Middle Cambrian fossils collected near Wolf Creek in the Wiseman quadrangle, northern Alaska, include trilobites and paraconodonts. Trilobites date the strata as early Middle Cambrian, correlative with the Amgan Stage of Siberia. The assemblage includes: Kootenia cf. K. anabarensis Lermontova, cf. 'Parehmania' lata Chernysheva and Pagetia sp. Specimens of the paracondont genus Westergaardodina, from the same sample as the megafossils, record the earliest known occurrence of this taxon. These fossils, the first to establish an age for part of the sedimentary sequence in the Doonerak Anticlinorium, are the oldest fossils yet taken from the central and western Brooks Range.
","language":"English","publisher":"Paleontology Society","issn":"00223360","usgsCitation":"Dutro, J., Palmer, A.R., Repetski, J., and Brosge, W., 1984, Middle Cambrian fossils from the Doonerak anticlinorium, central Brooks Range, Alaska: Journal of Paleontology, v. 58, no. 6, p. 1364-1371.","productDescription":"8 p.","startPage":"1364","endPage":"1371","numberOfPages":"8","costCenters":[],"links":[{"id":225870,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"58","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a56cce4b0c8380cd6d824","contributors":{"authors":[{"text":"Dutro, J.T. Jr.","contributorId":8432,"corporation":false,"usgs":true,"family":"Dutro","given":"J.T.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":367540,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Palmer, A. R.","contributorId":41819,"corporation":false,"usgs":true,"family":"Palmer","given":"A.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367542,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Repetski, J.E.","contributorId":38579,"corporation":false,"usgs":true,"family":"Repetski","given":"J.E.","affiliations":[],"preferred":false,"id":367541,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brosge, W. P.","contributorId":58248,"corporation":false,"usgs":true,"family":"Brosge","given":"W. P.","affiliations":[],"preferred":false,"id":367543,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70013208,"text":"70013208 - 1984 - Heavy minerals in surficial sediments from lower Cook Inlet, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:18:39","indexId":"70013208","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Heavy minerals in surficial sediments from lower Cook Inlet, Alaska","docAbstract":"Amphiboles, orthopyroxenes, and clinopyroxenes dominate the heavy mineral suite of surficial sediments in lower Cook Inlet, Alaska. Sources for these sediments include the igneous arc terrane of the northeast Alaska Range, reworked intrabasinal sediments, and local drainages in lower Cook Inlet. The distribution of these deposits is a reflection of both the tidal currents and the prevailing southerly net movement from the head of Cook Inlet. The heavy mineral studies concur with similar findings from gravel analyses, clay mineral investigations, and quartz microtexture observations. ?? 1984 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geo-Marine Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02237970","issn":"02760460","usgsCitation":"Wong, F.L., 1984, Heavy minerals in surficial sediments from lower Cook Inlet, Alaska: Geo-Marine Letters, v. 4, no. 1, p. 25-30, https://doi.org/10.1007/BF02237970.","startPage":"25","endPage":"30","numberOfPages":"6","costCenters":[],"links":[{"id":204987,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02237970"},{"id":219902,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a301ee4b0c8380cd5d3a2","contributors":{"authors":[{"text":"Wong, F. L.","contributorId":87515,"corporation":false,"usgs":true,"family":"Wong","given":"F.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":365549,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":20922,"text":"ofr83170E - 1984 - Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska","interactions":[],"lastModifiedDate":"2023-08-24T20:19:08.896426","indexId":"ofr83170E","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"83-170","chapter":"E","title":"Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska","docAbstract":"A remote sensing study using Landsat images was undertaken as part of the Alaska Mineral Resource Assessment Program (AMRAP). Geomorphic domains A and B, identified on enhanced Landsat images, divide Circle quadrangle south of Tintina fault zone into two regional areas having major differences in surface characteristics. Domain A is a roughly rectangular, northeast-trending area of relatively low relief and simple, widely spaced drainages, except where igneous rocks are exposed. In contrast, domain B, which bounds two sides of domain A, is more intricately dissected showing abrupt changes in slope and relatively high relief. The northwestern part of geomorphic domain A includes a previously mapped tectonostratigraphic terrane. The southeastern boundary of domain A occurs entirely within the adjoining tectonostratigraphic terrane. The sharp geomorphic contrast along the southeastern boundary of domain A and the existence of known faults along this boundary suggest that the southeastern part of domain A may be a subdivision of the adjoining terrane. Detailed field studies would be necessary to determine the characteristics of the subdivision. \r\n\r\nDomain B appears to be divisible into large areas of different geomorphic terrains by east-northeast-trending curvilinear lines drawn on Landsat images. Segments of two of these lines correlate with parts of boundaries of mapped tectonostratigraphic terranes. On Landsat images prominent north-trending lineaments together with the curvilinear lines form a large-scale regional pattern that is transected by mapped north-northeast-trending high-angle faults. The lineaments indicate possible lithlogic variations and/or structural boundaries. \r\n\r\nA statistical strike-frequency analysis of the linear features data for Circle quadrangle shows that northeast-trending linear features predominate throughout, and that most northwest-trending linear features are found south of Tintina fault zone. A major trend interval of N.64-72E. in the linear feature data, corresponds to the strike of foliations in metamorphic rocks and magnetic anomalies reflecting compositional variations suggesting that most linear features in the southern part of the quadrangle probably are related to lithologic variations brought about by folding and foliation of metamorphic rocks. A second important trend interval, N.14-35E., may be related to thrusting south of the Tintina fault zone, as high concentrations of linear features within this interval are found in areas of mapped thrusts. Low concentrations of linear features are found in areas of most igneous intrusives. High concentrations of linear features do not correspond to areas of mineralization in any consistent or significant way that would allow concentration patterns to be easily used as an aid in locating areas of mineralization. \r\n\r\nThe results of this remote sensing study indicate that there are several possibly important areas where further detailed studies are warranted.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr83170E","usgsCitation":"Simpson, S.L., 1984, Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170, Report: iii, 31 p.; 1 Plate: 37.23 x 22.84 inches, https://doi.org/10.3133/ofr83170E.","productDescription":"Report: iii, 31 p.; 1 Plate: 37.23 x 22.84 inches","costCenters":[],"links":[{"id":50512,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0170e/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":50513,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0170e/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":153918,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0170e/report-thumb.jpg"},{"id":420135,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_13921.htm","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Alaska","otherGeospatial":"Circle quadrangle","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -147,\n 66\n ],\n [\n -147,\n 65\n ],\n [\n -144,\n 65\n ],\n [\n -144,\n 66\n ],\n [\n -147,\n 66\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67c553","contributors":{"authors":[{"text":"Simpson, S. L.","contributorId":46508,"corporation":false,"usgs":true,"family":"Simpson","given":"S.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":183505,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70180414,"text":"70180414 - 1984 - Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981","interactions":[{"subject":{"id":70180414,"text":"70180414 - 1984 - Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981","indexId":"70180414","publicationYear":"1984","noYear":false,"title":"Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981"},"predicate":"IS_PART_OF","object":{"id":38497,"text":"pp1375 - 1984 - Geological Survey research, fiscal year 1981","indexId":"pp1375","publicationYear":"1984","noYear":false,"title":"Geological Survey research, fiscal year 1981"},"id":1}],"isPartOf":{"id":38497,"text":"pp1375 - 1984 - Geological Survey research, fiscal year 1981","indexId":"pp1375","publicationYear":"1984","noYear":false,"title":"Geological Survey research, fiscal year 1981"},"lastModifiedDate":"2017-01-30T16:11:59","indexId":"70180414","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1375","title":"Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981","docAbstract":"Geologic mapping and potassium-argon dating by R. L. Detterman, F. H. Wilson, J. E. Case, and Nora Shew in the Ugashik and western part of the Karluk quadrangles have shown that the Eocene and Oligocene volcanic arc continues into these quadrangles from the south in the Chignik and Sutwik Island quadrangles. Surface exposures of the arc extend northward to approximately 57°30'N., or midway through the Ugashik quadrangle, but none are observed north of that point. Subsurface drill-hole data (Brockway and others, 1975) indicate continuation of the arc, possibly offset to the northwest of the northernmost known surface exposures.
In the extreme northern part of the Ugashik and Karluk quadrangles, volcanic rocks again become important. These volcanic rocks are as yet undated; however, they may be related to the Katmai late Tertiary volcanic centers.
Like the early Tertiary volcanic arc, the present-day Aleutian arc is also offset to the northwest in the northern part of the Ugashik and Karluk quadrangles. No major offset of the Mesozoic rocks is indicated through the offset zone; this fact suggests a change in the Tertiary tectonic regime in the area of the offset.
","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Geological Survey research, fiscal year 1981 (Professional Paper 1375)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","doi":"10.3133/70180414","usgsCitation":"U.S. Geological Survey, 1984, Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981: U.S. Geological Survey Professional Paper 1375, 1 p., https://doi.org/10.3133/70180414.","productDescription":"1 p.","startPage":"79","endPage":"79","numberOfPages":"1","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":334317,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":334316,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/1375/report.pdf#page=88","text":"Start page in larger work"}],"country":"United States","state":"Alaska","otherGeospatial":"Alaska Peninsula, Karluk quadrangle, Ugashik quadrangle","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58905f07e4b072a7ac0cadc3","contributors":{"authors":[{"text":"U.S. Geological Survey","contributorId":128037,"corporation":true,"usgs":false,"organization":"U.S. Geological Survey","id":661614,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70012665,"text":"70012665 - 1984 - U. S. GEOLOGICAL SURVEY ALASKAN GOLD PROJECT.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:06","indexId":"70012665","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"U. S. GEOLOGICAL SURVEY ALASKAN GOLD PROJECT.","docAbstract":"The United States Geological Survey has begun a state-wide study of Alaskan gold deposits. The immediate goals are to determine the relationship of gold in placer deposits to possible primary sources, to determine how nuggets form, to contribute to existing knowledge of principles for prospecting for placer deposits, and determine if minerals associated with placer deposits might suggest important deposits of other metals. The project started in 1982 with a study of placer mines in the Brooks Range.","largerWorkTitle":"University of Alaska, Mineral Industry Research Laboratory, MIRL Report","conferenceTitle":"Sixth Annual Conference on Alaskan Placer Mining.","conferenceLocation":"Fairbanks, AK, USA","language":"English","publisher":"Univ of Alaska","publisherLocation":"Fairbanks, AK, USA","issn":"00655961","usgsCitation":"Antweiler, J.C., Cathrall, J., and Tripp, R., 1984, U. S. GEOLOGICAL SURVEY ALASKAN GOLD PROJECT., in University of Alaska, Mineral Industry Research Laboratory, MIRL Report, no. 69, Fairbanks, AK, USA, p. 69-72.","startPage":"69","endPage":"72","numberOfPages":"4","costCenters":[],"links":[{"id":222216,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"69","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb9e6e4b08c986b327ebe","contributors":{"authors":[{"text":"Antweiler, John C.","contributorId":9661,"corporation":false,"usgs":true,"family":"Antweiler","given":"John","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":364172,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cathrall, John","contributorId":36292,"corporation":false,"usgs":true,"family":"Cathrall","given":"John","affiliations":[],"preferred":false,"id":364173,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tripp, Richard","contributorId":44914,"corporation":false,"usgs":true,"family":"Tripp","given":"Richard","affiliations":[],"preferred":false,"id":364174,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013330,"text":"70013330 - 1984 - Regional variations in the fluvial Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate, Brooks Range, Alaska","interactions":[],"lastModifiedDate":"2018-05-29T10:40:49","indexId":"70013330","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3368,"text":"Sedimentary Geology","active":true,"publicationSubtype":{"id":10}},"title":"Regional variations in the fluvial Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate, Brooks Range, Alaska","docAbstract":"The wholly allochthonous Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate is one of the most extensive fluvial deposits in North America. It crops out for 950 km along the crest of the Brooks Range in a series of thrust plates and is as thick as 2615 m. The Kanayut forms the fluvial part of a large, coarse-grained delta. The lower part of the Kanayut (the Ear Peak Member) overlies marginal-marine and prodelta turbidite deposits and consists of fining-upward meandering-stream-channel cycles of conglomerate and sandstone within black to maroon floodplain shale deposits. The middle part of the Kanayut (the Shainin Lake Member) lacks shale and consists of fining-upward couplets of channelized conglomerate and parallel- to cross-stratified sandstone interpreted as braidplain deposits. These deposits contain the largest clasts (23 cm) and were deposited during maximum progradation of the fluvial sequence. The upper part of the Kanayut (the Stuver Member), which consists of fining-upward meandering stream cycles similar to those of the lower part, grades upward into overlying Lower Mississippian tidal and marginal-marine deposits. Paleocurrent data and distribution of largest clasts indicate that the Kanayut was deposited by southwest-flowing streams fed by at least two major trunk streams that drained a mountainous region to the north and east. Comparison of stratigraphic and sedimentologic data collected at three selected locations representative of proximal, intermediate and distal parts of the Kanayut basin reveal regional variations in its fluvial character. These include a decrease in total thickness of fluvial strata, an increase in total thickness of associated marine sandstone, the pinch-out of the coarse-grained middle part of the Kanayut and decreases in the conglomerate/sandstone and sandstone/shale ratios from proximal to distal areas of the basin. The coarse-grained parts of the fluvial cycles decrease in thickness and lateral extent from proximal to distal areas of the basin. In more distal areas of sedimentation, the middle parts of some fluvial cycles consist of calcareous and bioturbated marine sandstone. Although thinner than in more proximal areas, the associated fine-grained upper parts of some cycles also contain marine features and suggest that these strata represent the deposits of interdistributary bays. These features are interpreted to indicate that the proximal deposits of the Kanayut Conglomerate were deposited by large, stable fine-grained meandering rivers (the Ear Peak and Stuver Members) and gravelly braided rivers (Shainin Lake Member) on the upper delta plain of the Kanayut delta. Sedimentation in more distal locations, interpreted to represent lower delta plain deposits, was by smaller distributary rivers with characteristics of both braided and meandering streams. Near their interface with marginal marine deposits the fluvial deposits were locally strongly influenced by tidal or estuarine conditions. ?? 1984.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sedimentary Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/0037-0738(84)90090-3","issn":"00370738","usgsCitation":"Moore, T., and Nilsen, T.H., 1984, Regional variations in the fluvial Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate, Brooks Range, Alaska: Sedimentary Geology, v. 38, no. 1-4, p. 465-497, https://doi.org/10.1016/0037-0738(84)90090-3.","startPage":"465","endPage":"497","numberOfPages":"33","costCenters":[],"links":[{"id":219793,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a598e4b0e8fec6cdbe8d","contributors":{"authors":[{"text":"Moore, Thomas E. 0000-0002-0878-0457","orcid":"https://orcid.org/0000-0002-0878-0457","contributorId":85592,"corporation":false,"usgs":true,"family":"Moore","given":"Thomas E.","affiliations":[],"preferred":false,"id":365824,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nilsen, T. H.","contributorId":93057,"corporation":false,"usgs":true,"family":"Nilsen","given":"T.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":365825,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013945,"text":"70013945 - 1984 - BOWIEITE: A NEW RHODIUM-IRIDIUM-PLATINUM SULFIDE IN PLATINUM-ALLOY NUGGETS, GOODNEWS BAY, ALASKA.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:35","indexId":"70013945","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1177,"text":"Canadian Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"BOWIEITE: A NEW RHODIUM-IRIDIUM-PLATINUM SULFIDE IN PLATINUM-ALLOY NUGGETS, GOODNEWS BAY, ALASKA.","docAbstract":"Bowieite (Rh,Ir,Pt)//2S//3, a new mineral species, is found in three nuggets of platinum from Goodnews Bay, Alaska. In linearly polarized reflected light, and compared to the host, higher reflecting white platinum-iridium alloy, bowieite is pale gray to pale gray-brown; neither bireflectance nor reflectance pleochroism is apparent. With polars crossed, its anisotropic rotation tints vary from gray to dark brown. Luminance values (relative to the CIE illuminant C) for R//1 and R//2, computed from full spectral data for the most bireflectant grain, are 45. 8% and 48. 2% in air, and 30. 5% and 33. 0% in oil, respectively. VHN//1//0//0 1288 (858 to 1635). Bowieite is orthorhombic, space group Pnca, with a 8. 454(7) -8. 473(8), b 5. 995(1)-6. 002(7), c 6. 143(1)-6. 121(8) A, Z equals 4. Some grains that are 2. 6 to 3. 8 atomic % metal-deficient occur as an optically coherent rim on bowieite; the rim and the bowieite grain are not optically continuous.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Mineralogist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00084476","usgsCitation":"Desborough, G.A., and Criddle, A.J., 1984, BOWIEITE: A NEW RHODIUM-IRIDIUM-PLATINUM SULFIDE IN PLATINUM-ALLOY NUGGETS, GOODNEWS BAY, ALASKA.: Canadian Mineralogist, v. 22, no. pt 4, p. 543-552.","startPage":"543","endPage":"552","numberOfPages":"10","costCenters":[],"links":[{"id":225741,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"pt 4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ef86e4b0c8380cd4a2cc","contributors":{"authors":[{"text":"Desborough, George A.","contributorId":101661,"corporation":false,"usgs":true,"family":"Desborough","given":"George","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":367218,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Criddle, Alan J.","contributorId":23696,"corporation":false,"usgs":true,"family":"Criddle","given":"Alan","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":367217,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013165,"text":"70013165 - 1984 - Magmatic epidote and its petrologic significance","interactions":[],"lastModifiedDate":"2024-01-31T01:23:45.218936","indexId":"70013165","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Magmatic epidote and its petrologic significance","docAbstract":"Epidote is a major magmatic mineral in tonalite and granodiorite in a belt coextensive with the Mesozoic accreted terranes between northern California and southeastern Alaska. Textural and chemical evidence indicates that epidote crystallized as a relatively late but magmatic mineral that formed through reaction with hornblende in the presence of a melt phase. The observed relations concur with experimental data on crystallization of epidote from synthetic granodiorite at 8 kbar total pressure. Plutonic rocks bearing magmatic epidote must have formed under moderately high pressures, corresponding to lower crustal depths, under fairly oxidizing conditions.
The Border Ranges fault separates structurally complex accreted Cretaceous rocks from less deformed middle or late Paleozoic and younger rocks in the Cook-Shelikof basin. Of the five types of geophysical data used to investigate this fault, gravity data give the clearest indication of its presence and crustal structure. For at least 400 km along the fault, gravity anomalies include a +20 to +30 mGal peak along the fault's upper plate and a −40 mGal trough along the lower plate. The paired anomaly can be modeled satisfactorily by a simple step, in a deep dense layer, that lies within 3 km of the projected offshore location of the fault. Relatively low-density rocks lie along the fault's lower plate to a depth of about 10 km, and the upper part of the fault dips within 20° of vertical. Satellite altimetry data show that two circular geoid lows lie along the Border Ranges fault and coincide with lows in free air gravity data. Seismic refraction and seismic reflection data suggest that the large-scale density anomalies that cause both types of lows must lie at depths greater than about 1 km within the margin. Three regional magnetic anomalies (Knik Arm, Seldovia, and Shelikof) terminate at the Border Ranges fault, suggesting that the fault truncates obliquely rocks that lie along its northwest side. Six seismic reflection lines cross the Border Ranges fault, but none of them shows reflections from it. The absence of such reflections probably results from the fault's steep dip and from the presence of strong water bottom multiples in the data. From the Late Jurassic until the early Late Cretaceous, the magmatic arc near the Cook-Shelikof basin was inactive, and we infer that the predominant motion along the Border Ranges fault was strike slip. Resurgent Late Cretaceous magmatism was contemporaneous with uplift of rocks along the northwest side of the Border Ranges fault and with deformation of turbidite sequences in the fault's lower plate. We propose that during the Late Cretaceous, motion along the Border Ranges changed from strike slip to reverse. Cenozoic rocks near the fault show no evidence for post-Cretaceous fault movement.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB089iB13p11333","issn":"01480227","usgsCitation":"Fisher, M.A., and von Huene, R.E., 1984, Geophysical investigation of a Suture Zone: The Border Ranges Fault of southern Alaska: Journal of Geophysical Research Solid Earth, v. 89, no. B13, p. 11333-11351, https://doi.org/10.1029/JB089iB13p11333.","productDescription":"19 p.","startPage":"11333","endPage":"11351","numberOfPages":"19","costCenters":[],"links":[{"id":220044,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"89","issue":"B13","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a2828e4b0c8380cd59ea8","contributors":{"authors":[{"text":"Fisher, M. A.","contributorId":69972,"corporation":false,"usgs":true,"family":"Fisher","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":366309,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"von Huene, Roland E. 0000-0003-1301-3866 rvonhuene@usgs.gov","orcid":"https://orcid.org/0000-0003-1301-3866","contributorId":191070,"corporation":false,"usgs":true,"family":"von Huene","given":"Roland","email":"rvonhuene@usgs.gov","middleInitial":"E.","affiliations":[{"id":7065,"text":"USGS emeritus","active":true,"usgs":false},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":false,"id":366310,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70194901,"text":"70194901 - 1984 - Social organization of sea otters in Prince William Sound, Alaska","interactions":[],"lastModifiedDate":"2018-01-26T17:33:24","indexId":"70194901","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1176,"text":"Canadian Journal of Zoology","active":true,"publicationSubtype":{"id":10}},"title":"Social organization of sea otters in Prince William Sound, Alaska","docAbstract":"Sea otters in Prince William Sound. Alaska, were spatially segregated into predominantly (97%) male areas at the front of the expanding population and breeding areas with fewer (up to 33%) males. From 1975 to 1984 we captured and marked 267 otters with tags and (or) radio transmitters and investigated their reproductive strategies, social relationships, and patterns of sexual segregation. Mating occurred year-round, but peaked in September and October. Females first bred at 4 years of age and were capable of pupping annually; they generally separated from their pup before mating. Males established breeding territories that enabled prolonged precopulatory interactions that may have prompted female–pup separation and post-copulatory interactions that precluded females from mating with other males. Male mating success was related to age, weight, territory quality, and the length of time they maintained their territory. After the breeding season, territorial males returned to male areas where food was more abundant. Young, dispersing males also entered male areas and remained there until attaining breeding age. In male areas, otters commonly rested in groups of >50 individuals. Gregariousness promoted social interactions and likely enhanced food finding and (historically) predator protection. As food diminished, males moved into adjacent, unoccupied regions; females then occupied former male areas.
","language":"English","publisher":"NRC Research Press","doi":"10.1139/z84-385","usgsCitation":"Garshelis, D., Johnson, A.M., and Garshelis, J.A., 1984, Social organization of sea otters in Prince William Sound, Alaska: Canadian Journal of Zoology, v. 62, no. 12, p. 2648-2658, https://doi.org/10.1139/z84-385.","productDescription":"11 p.","startPage":"2648","endPage":"2658","costCenters":[],"links":[{"id":350732,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Prince William Sound","volume":"62","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5a6c4ca1e4b06e28e9cabb46","contributors":{"authors":[{"text":"Garshelis, David L.","contributorId":89457,"corporation":false,"usgs":true,"family":"Garshelis","given":"David L.","affiliations":[],"preferred":false,"id":726046,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, Ancel M.","contributorId":91543,"corporation":false,"usgs":false,"family":"Johnson","given":"Ancel","email":"","middleInitial":"M.","affiliations":[{"id":6987,"text":"U.S. Fish and Wildlife Sevice","active":true,"usgs":false}],"preferred":false,"id":726047,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Garshelis, Judith A.","contributorId":76386,"corporation":false,"usgs":false,"family":"Garshelis","given":"Judith","email":"","middleInitial":"A.","affiliations":[{"id":12644,"text":"University of Minnesota, St. Paul","active":true,"usgs":false}],"preferred":false,"id":726048,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70185099,"text":"70185099 - 1984 - Dietary changes and poor reproductive performance in Glaucous-winged Gulls","interactions":[],"lastModifiedDate":"2017-05-13T13:05:23","indexId":"70185099","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Dietary changes and poor reproductive performance in Glaucous-winged Gulls","docAbstract":"The breeding phenology of Glaucous-winged Gulls (Larus glaucescens) on Squab Island, Aialik Bay, Alaska in 1979 was identical to that in 1980, but clutch sizes and later reproductive performance differed markedly. In 1979, clutch sizes were small, but chick growth rates and survivorship were high. In contrast, clutch sizes were large in 1980, but chick growth rates were slow, and chick survivorship was extremely low. The different patterns of reproductive success appear to be related primarily to annual differences in foods utilized by adults. When adults fed primarily on blue mussels (Mytilus edulis), reproductive performance suffered, i.e. at the time of egg laying in 1979 and during the chick period in 1980. A switch to mussels from other prey types thus probably indicates a lack of availability of more suitable or preferred foods. Reproductive success at this colony appears to be strongly food limited; the timing of such limitation is not confined to a particular stage of reproduction.
","language":"English","publisher":"American Ornithological Society","usgsCitation":"Murphy, E., Day, R.H., Oakley, K.L., and Hoover, A.A., 1984, Dietary changes and poor reproductive performance in Glaucous-winged Gulls: The Auk, v. 101, no. 3, p. 532-541.","productDescription":"10 p.","startPage":"532","endPage":"541","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":337564,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":337563,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.jstor.org/stable/4086606"}],"country":"United States","state":"Alaska","otherGeospatial":"Aialik Bay, Squab Island ","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -150.11444091796875,\n 59.57467857518734\n ],\n [\n -149.25750732421875,\n 59.57467857518734\n ],\n [\n -149.25750732421875,\n 60.22617509945598\n ],\n [\n -150.11444091796875,\n 60.22617509945598\n ],\n [\n -150.11444091796875,\n 59.57467857518734\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"101","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58c90130e4b0849ce97abd6b","contributors":{"authors":[{"text":"Murphy, Edward C.","contributorId":8826,"corporation":false,"usgs":true,"family":"Murphy","given":"Edward C.","affiliations":[],"preferred":false,"id":684348,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day, Robert H.","contributorId":74446,"corporation":false,"usgs":false,"family":"Day","given":"Robert","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":684349,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oakley, Karen L. koakley@usgs.gov","contributorId":747,"corporation":false,"usgs":true,"family":"Oakley","given":"Karen","email":"koakley@usgs.gov","middleInitial":"L.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":684350,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hoover, A. Anne","contributorId":189276,"corporation":false,"usgs":false,"family":"Hoover","given":"A.","email":"","middleInitial":"Anne","affiliations":[],"preferred":false,"id":684351,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70184275,"text":"70184275 - 1984 - Breeding biology of Pacific white-fronted geese","interactions":[],"lastModifiedDate":"2017-03-06T16:12:05","indexId":"70184275","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Breeding biology of Pacific white-fronted geese","docAbstract":"Nesting ecology of Pacific white-fronted geese (Anser albifrons frontalis) was studied on a 9.9-km2 area on the Yukon-Kuskokwim (Y-K) Delta, Alaska, during 1977-79. Availability of nesting habitat varied considerably among years because of differences in time of snow- and icemelt. Mean clutch size was 3.7 eggs in the late spring thaw year and 5.2 and 5.7 eggs in early snowmelt years. Peak (and duration) of nest initiation was 1-2 June (16 days) in the late spring and 15-18 May (20-21 days) during early springs. When nest sites were available early, the time interval between arrival and date of nest initiation closely approximated the time required for rapid yolk development. This suggests that whitefronts may be physiologically prevented from nesting earlier in such years. The duration of nest initiation was comparable to that of other goose species nesting on the Y-K Delta, but longer than for goose populations of several species nesting farther north or in the midcontinent. Overall, 68% of whitefront nests were in lowland habitat, 23% in intermediate habitat, and 10% in upland habitat, but habitat use varied significantly between early and late years. Whitefronts most commonly nested on slough banks (55%), lake shores (23%), and grass-sedge meadows (11%). A quantitative description of vegetation associated with nest sites is given. Major causes of nest destruction were flooding (28%) and predation (9%). Nesting success over the 3-year period averaged 62%.
","language":"English","publisher":"Wiley","doi":"10.2307/3801429","usgsCitation":"Ely, C.R., and Raveling, D.G., 1984, Breeding biology of Pacific white-fronted geese: Journal of Wildlife Management, v. 48, no. 3, p. 823-837, https://doi.org/10.2307/3801429.","startPage":"823","endPage":"837","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":336892,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon-Kuskokwim Delta","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -166.05972290039062,\n 61.05030961670573\n ],\n [\n -165.26458740234375,\n 61.05030961670573\n ],\n [\n -165.26458740234375,\n 61.497802593442294\n ],\n [\n -166.05972290039062,\n 61.497802593442294\n ],\n [\n -166.05972290039062,\n 61.05030961670573\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"48","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58be8350e4b014cc3a3a9a4f","contributors":{"authors":[{"text":"Ely, Craig R. 0000-0003-4262-0892 cely@usgs.gov","orcid":"https://orcid.org/0000-0003-4262-0892","contributorId":3214,"corporation":false,"usgs":true,"family":"Ely","given":"Craig","email":"cely@usgs.gov","middleInitial":"R.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":680836,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raveling, Dennis G.","contributorId":89443,"corporation":false,"usgs":true,"family":"Raveling","given":"Dennis","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":680837,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70045311,"text":"70045311 - 1984 - Notes on sedimentation activities calendar year 1983","interactions":[],"lastModifiedDate":"2013-05-23T11:23:09","indexId":"70045311","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"Notes on sedimentation activities calendar year 1983","docAbstract":"This report is a digest of information furnished by those Federal agencies conducting sedimentation investigations. It includes descriptions of work in progress or planned, important findings, new methods, new publications, laboratory and other research activities, and other pertinent information. The material has been organized by major drainage regions in the conterminous United States, Alaska, Hawaii, Puerto Rico, and foreign. There is also a section on Research and Other Activities.","language":"English","publisher":"U.S. Geological Survey, Office of Water Data Coordination","publisherLocation":"Reston, VA","usgsCitation":"U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation, 1984, Notes on sedimentation activities calendar year 1983, xxi, 188.","productDescription":"xxi, 188","numberOfPages":"212","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":270687,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/unnumbered/70045311/report-thumb.jpg"},{"id":272710,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/unnumbered/70045311/report.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5165386fe4b077fa94dadfe1","contributors":{"authors":[{"text":"U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation","contributorId":127893,"corporation":true,"usgs":false,"organization":"U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation","id":535469,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014034,"text":"70014034 - 1984 - Mass movement of fine-grained sediment to the basin floor, bering sea, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:19:34","indexId":"70014034","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Mass movement of fine-grained sediment to the basin floor, bering sea, Alaska","docAbstract":"Large volumes of fine-grained sediment have been transported to the deepbasin floor in the Bering Sea, especially during glacial low stands of sea level. Turbidity currents and several types of mass movement have been the chief transporting agents. ?? 1985 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geo-Marine Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02281710","issn":"02760460","usgsCitation":"Carlson, P., and Karl, H.A., 1984, Mass movement of fine-grained sediment to the basin floor, bering sea, Alaska: Geo-Marine Letters, v. 4, no. 3-4, p. 221-225, https://doi.org/10.1007/BF02281710.","startPage":"221","endPage":"225","numberOfPages":"5","costCenters":[],"links":[{"id":205671,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02281710"},{"id":225999,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5252e4b0c8380cd6c30c","contributors":{"authors":[{"text":"Carlson, P.R.","contributorId":97055,"corporation":false,"usgs":true,"family":"Carlson","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":367424,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Karl, Herman A.","contributorId":80649,"corporation":false,"usgs":true,"family":"Karl","given":"Herman","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":367423,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013869,"text":"70013869 - 1984 - Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska","interactions":[],"lastModifiedDate":"2023-09-25T19:03:27.398425","indexId":"70013869","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1168,"text":"Canadian Journal of Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska","docAbstract":"The rocks of southwestern Umnak Island (Nikolski area) consist mainly of a slightly deformed marine sedimentary sequence intruded by hypabyssal quartz diorite sills and small plutons. Laminated and thin-bedded argillaceous and tuffaceous mudstone and siltstone reflect volcanic arc sedimentation from late Eocene to early Oligocene time. Zeolite facies minerals formed during diagenesis include heulandite, analcime, quartz, chlorite, and smectite. Radiometric dates from sill rock and plutons yield apparent ages of about 30 Ma, i.e, middle Oligocene. Chemical data from igneous rocks exhibit calc-alkaline and tholeiitic volcanic arc differentiation trends. Dikes of pyroxene basalt yield K/Ar apparent ages as old at 17 Ma, and a columnar-jointed plug of pyroxene basalt is as young as 1 Ma. The fossil ages and radiometric dates from southwestern Umnak Island are similar to those reported from other central and eastern Aleutian islands, and indicate uniformity in the chronology and tectonic development of the archipelago during the Paleogene. Paleomagnetic data suggest possible northward movement but remain equivocal and more work is indicated.
","language":"English","publisher":"Canadian Science Publishing","doi":"10.1139/e84-018","issn":"00084077","usgsCitation":"McLean, H., and Hein, J., 1984, Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska: Canadian Journal of Earth Sciences, v. 21, no. 2, p. 171-180, https://doi.org/10.1139/e84-018.","productDescription":"10 p.","startPage":"171","endPage":"180","costCenters":[],"links":[{"id":220061,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Aleutian Islands, Umnak Island","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -168.3540069569559,\n 53.277232548936325\n ],\n [\n -168.34871152521723,\n 53.26377335774001\n ],\n [\n -168.36592167836776,\n 53.25427020096612\n ],\n [\n -168.3751886839104,\n 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]\n}","volume":"21","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a73eae4b0c8380cd77307","contributors":{"authors":[{"text":"McLean, H.","contributorId":11212,"corporation":false,"usgs":true,"family":"McLean","given":"H.","email":"","affiliations":[],"preferred":false,"id":367049,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hein, J.R. 0000-0002-5321-899X","orcid":"https://orcid.org/0000-0002-5321-899X","contributorId":61429,"corporation":false,"usgs":true,"family":"Hein","given":"J.R.","affiliations":[],"preferred":false,"id":367050,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013282,"text":"70013282 - 1984 - Bedding types in Holocene tidal channel sequences, Knik Arm, Upper Cook Inlet, Alaska","interactions":[],"lastModifiedDate":"2024-05-21T23:27:45.975971","indexId":"70013282","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Bedding types in Holocene tidal channel sequences, Knik Arm, Upper Cook Inlet, Alaska","docAbstract":"Uplifted convoluted and horizontal to subhorizontal beds of varying thickness in intertidal silt as old as 3,280 + or - 90 yr B.P. are exposed in the banks of tidal channels of unknown depth in the intertidal zone in Knik Arm of Upper Cook Inlet. Internal discordances may occur both within convoluted beds and between convoluted and horizontal to subhorizontal beds. At the base of many convoluted beds, there is a rapid gradation upward into laminae which are severely deformed; that is, in some places, the contortions appear to have originated along a single bedding plane. Where the convoluted sequences are truncated by nearly horizontal sequences, the distortion must have resulted from syndepositional or postdepositional events prior to their burial by the overlying beds. Various forms of gravitational and tidal processes caused the deformation of the Knik Arm deposits; events triggering the movement of the sediment include any or all of the following: (1) seismic activity, (2) sediment or ice loading, (3) wave-induced liquefaction, (4) pore-pressure changes brought on by changing levels of tidewater, (5) undercutting of sediments by channel migration, and (6) freezing and thawing.
No abstract available.
","conferenceDate":"May 30-June 1, 1984","conferenceLocation":"Anchorage, AK","language":"English","publisher":"Alaska Geological Society","usgsCitation":"Winkler, G., Miller, M.L., Hoekzema, R., and Dumoulin, J.A., 1984, Guide to the Bedrock Geology of a traverse of the Chugach Mountains from Anchorage to Cape Resurrection, 40 p.","productDescription":"40 p.","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":335057,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":335055,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.alaskageology.org/pubfieldbooks.htm","text":"AGS Publications list: Item #FG12"},{"id":335056,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/alaska/data/008/008001/i_akgs008i.htm"}],"country":"United States","state":"Alaska","otherGeospatial":"Chugach Mountains","publicComments":"Prepared for a field trip in conjunction wit h the 80th annual meeting of the Cordilleran Section of the Geological Society of America, May 30 and 31, and June 1, 1984, in Anchorage , Alaska ","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"589c3c50e4b0efcedb741129","contributors":{"authors":[{"text":"Winkler, Gary R.","contributorId":75513,"corporation":false,"usgs":true,"family":"Winkler","given":"Gary R.","affiliations":[],"preferred":false,"id":662898,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, Marti L. 0000-0003-0285-4942 mlmiller@usgs.gov","orcid":"https://orcid.org/0000-0003-0285-4942","contributorId":561,"corporation":false,"usgs":true,"family":"Miller","given":"Marti","email":"mlmiller@usgs.gov","middleInitial":"L.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":662899,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hoekzema, R.B.","contributorId":29512,"corporation":false,"usgs":true,"family":"Hoekzema","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":662900,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dumoulin, Julie A. 0000-0003-1754-1287 dumoulin@usgs.gov","orcid":"https://orcid.org/0000-0003-1754-1287","contributorId":203209,"corporation":false,"usgs":true,"family":"Dumoulin","given":"Julie","email":"dumoulin@usgs.gov","middleInitial":"A.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":662901,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70180305,"text":"70180305 - 1984 - The Jeanie Point complex revisited","interactions":[{"subject":{"id":70180305,"text":"70180305 - 1984 - The Jeanie Point complex revisited","indexId":"70180305","publicationYear":"1984","noYear":false,"title":"The Jeanie Point complex revisited"},"predicate":"IS_PART_OF","object":{"id":4435,"text":"cir868 - 1984 - The United States Geological Survey in Alaska: Accomplishments during 1981","indexId":"cir868","publicationYear":"1984","noYear":false,"title":"The United States Geological Survey in Alaska: Accomplishments during 1981"},"id":1}],"isPartOf":{"id":4435,"text":"cir868 - 1984 - The United States Geological Survey in Alaska: Accomplishments during 1981","indexId":"cir868","publicationYear":"1984","noYear":false,"title":"The United States Geological Survey in Alaska: Accomplishments during 1981"},"lastModifiedDate":"2018-07-07T17:07:58","indexId":"70180305","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"868","title":"The Jeanie Point complex revisited","docAbstract":"The so-called Jeanie Point complex is a distinctive package of rocks within the Orca Group, a Tertiary turbidite sequence. The rocks crop out on the southeast coast of Montague Island, Prince William Sound, approximately 3 km northeast of Jeanie Point (loc. 7, fig. 44). These rocks consist dominantly of fine-grained limestone and lesser amounts of siliceous limestone, chert, tuff, mudstone, argillite, and sandstone (fig. 47). The Jeanie Point rocks also differ from those typical of the Orca Group in their fold style. Thus, the Orca Group of the area is isoclinally folded on a large scale (tens to hundreds of meters), whereas the Jeanie Point rocks are tightly folded on a 1- to 3- m-wavelength scale (differences in rock competency may be responsible for this variation in fold style).
","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"The United States Geological Survey in Alaska: Accomplishments during 1981 (Circular 868)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Alexandria, VA","doi":"10.3133/70180305","usgsCitation":"Dumoulin, J.A., and Miller, M.L., 1984, The Jeanie Point complex revisited: U.S. Geological Survey Circular 868, 3 p., https://doi.org/10.3133/70180305.","productDescription":"3 p.","startPage":"75","endPage":"77","numberOfPages":"3","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":334109,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":334108,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1984/0868/report.pdf#page=87","text":"Start page in larger work"}],"country":"United States","state":"Alaska","otherGeospatial":"The Jeanie Point complex","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"588b198be4b0ad67323f9870","contributors":{"authors":[{"text":"Dumoulin, Julie A. 0000-0003-1754-1287 dumoulin@usgs.gov","orcid":"https://orcid.org/0000-0003-1754-1287","contributorId":203209,"corporation":false,"usgs":true,"family":"Dumoulin","given":"Julie","email":"dumoulin@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":661132,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, Marti L. 0000-0003-0285-4942 mlmiller@usgs.gov","orcid":"https://orcid.org/0000-0003-0285-4942","contributorId":561,"corporation":false,"usgs":true,"family":"Miller","given":"Marti","email":"mlmiller@usgs.gov","middleInitial":"L.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":661133,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013700,"text":"70013700 - 1984 - The Kingak shale of northern Alaska—regional variations in organic geochemical properties and petroleum source rock quality","interactions":[],"lastModifiedDate":"2025-03-17T16:44:43.862263","indexId":"70013700","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"The Kingak shale of northern Alaska—regional variations in organic geochemical properties and petroleum source rock quality","docAbstract":"The Kingak Shale, a thick widespread rock unit in northern Alaska that ranges in age from Early Jurassic through Early Cretaceous, has adequate to good oil source rock potential. This lenticular-shaped rock unit is as much as 1200 m thick near the Jurassic shelf edge, where its present-day burial depth is about 5000 m. Kingak sediment, transported in a southerly direction, was deposited on the then marine continental shelf. The rock unit is predominantly dark gray Shale with some interbeds of thick sandstone and siltstone.
The thermal maturity of organic matter in the Kingak Shale ranges from immature (<0.6%R0) on the Barrow arch to postmature (>2.0%R0) in the Colville basin toward the south. Its organic carbon and hydrogen contents are highest in the eastern part of northern Alaska south of and around the Kuparuk and Prudhoe Bay oil fields. Carbon isotope data of oils and rock extracts indicate that the Kingak Shale is a source of some North Slope oil, but is probably not the major source.
","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(84)90076-7","usgsCitation":"Magoon, L.B., and Claypool, G., 1984, The Kingak shale of northern Alaska—regional variations in organic geochemical properties and petroleum source rock quality: Organic Geochemistry, v. 6, p. 533-542, https://doi.org/10.1016/0146-6380(84)90076-7.","productDescription":"10 p.","startPage":"533","endPage":"542","costCenters":[],"links":[{"id":220497,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"northern Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -163.98696842826936,\n 69.94847907298609\n ],\n [\n -166.6492872958367,\n 68.77233325870091\n ],\n [\n -145.71248264033215,\n 69.39962318192082\n ],\n [\n -141.04972996145256,\n 69.28061812453656\n ],\n [\n -141.3420843077143,\n 69.91408668992455\n ],\n [\n -156.4977076439097,\n 71.42955836169733\n ],\n [\n -160.29783311683522,\n 70.7955991556672\n ],\n [\n -163.98696842826936,\n 69.94847907298609\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba79de4b08c986b3216aa","contributors":{"authors":[{"text":"Magoon, Leslie B. lmagoon@usgs.gov","contributorId":2383,"corporation":false,"usgs":true,"family":"Magoon","given":"Leslie","email":"lmagoon@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":true,"id":366669,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Claypool, George E.","contributorId":8475,"corporation":false,"usgs":true,"family":"Claypool","given":"George E.","affiliations":[],"preferred":false,"id":366668,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013318,"text":"70013318 - 1984 - Gold in natural water: A method of determination by solvent extraction and electrothermal atomization","interactions":[],"lastModifiedDate":"2025-03-07T16:33:30.72093","indexId":"70013318","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Gold in natural water: A method of determination by solvent extraction and electrothermal atomization","docAbstract":"A method has been developed using electrothermal atomization to effectively determine the amount of gold in natural water within the nanogram range. The method has four basic steps: (1) evaporating a 1-L sample; (2) putting it in hydrobromic acid-bromine solution; (3) extracting the sample with methyl-isobutyl-ketone; and (4) determining the amount of gold using an atomic absorption spectrophotometer. The limit of detection is 0.001 μg gold per liter. Results from three studies indicate, respectively, that the method is precise, effective, and free of interference. Specifically, a precision study indicates that the method has a relative standard deviation of 16–18%; a recovery study indicates that the method recovers gold at an average of 93%; and an interference study indicates that the interference effects are eliminated with solvent extraction and background correction techniques. Application of the method to water samples collected from 41 sites throughout the Western United States and Alaska shows a gold concentration range of < 0.001 to 0.036 μg gold per liter, with an average of 0.005 μg/L.
","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(84)90072-4","issn":"03756742","usgsCitation":"McHugh, J.B., 1984, Gold in natural water: A method of determination by solvent extraction and electrothermal atomization: Journal of Geochemical Exploration, v. 20, no. 3, p. 303-310, https://doi.org/10.1016/0375-6742(84)90072-4.","productDescription":"8 p.","startPage":"303","endPage":"310","numberOfPages":"8","costCenters":[],"links":[{"id":220527,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a298ce4b0c8380cd5aa3d","contributors":{"authors":[{"text":"McHugh, J. B.","contributorId":79462,"corporation":false,"usgs":true,"family":"McHugh","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":365808,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013512,"text":"70013512 - 1984 - Macrotidal subarctic environment of Turnagain and Knik Arms, Upper Cook Inlet, Alaska: sedimentology of the intertidal zone","interactions":[],"lastModifiedDate":"2024-05-21T23:25:21.913787","indexId":"70013512","displayToPublicDate":"1984-01-01T00:00:00","publicationYear":"1984","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Macrotidal subarctic environment of Turnagain and Knik Arms, Upper Cook Inlet, Alaska: sedimentology of the intertidal zone","docAbstract":"An extensive sheet of silty sand crossed by tidal channels is exposed at low tide in Turnagain and Knik Arms, Alaska. Transportation and deposition of sediment composing this sheet is the result of strong tidal currents due to the maximum spring tidal range of approximately 11.4 m. In Turnagain and Knik Arms, the initiation of the floodtide is accompanied by the occurrence of a tidal bore that travels at a speed of 4 m/sec or more up the tidal channels. In intertidal environments in many parts of the world, physical processes of sedimentation are typically influenced by surface fauna; sedimentary structures in some zones are altered or obliterated by the activities of the infauna. However, in Turnagain and Knik Arms, virtually no macrofauna exist, and so the area provides an opportunity to study depositional processes and sedimentary structures without the masking effects of bioturbation. Suspended-sediment values for Turnagain and Knik Arms are greatest in the summer months and nearest low-tide stages. Ice floes form during winter months and, in combination with the freezing of intertidal sediment to several meters of depth, have a significant effect on sediment dispersal and on the deepening and increased stability of the tidal channels. The intertidal sediment is mainly very well sorted, medium to very fine sand and coarse silt, with a notable paucity of gravel, coarse sand, and clay. Sediment accumulates in sandbars oriented parallel to the axis of the estuary. Textural and facies patterns reflect decreasing current energy, first, as a function of distance from the mouth of the estuary and, second, as a function of topographic elevation on the sandbars. The intertidal deposits in Turnagain Arm contain a transitional upward-fining sequence which is analogous to point-bar and channel-bar successions described by other workers. The base of the sequence contains parallel-laminated sand that is overlain by mixed parallel- and cross-laminated silty sand overlain by cross-laminated silty sand. At the top of the sequence is a unit of organically rich parallel-laminated silt and sandy silt. This suite of sedimentary features and textures indicates changing current velocities and directions as bars emerge or are modified during ebb tide, and the vertical sequences could potentially be used to record intertidal bar erosion and aggradation by point- and channel-bar migration, a process carried out primarily by bed-load currents.
Seismic monitoring in Alaska by the U.S Geological Survey consists of a network of 46 stations focused on the following four areas:
\nThere were three major earthquakes (7.0-7.9) during this reporting period, but all were in sparsely populated areas. The first occurred on July 11 in the South Shetland Islands, the second in the Aegean Sea on August 6, and the third on August 17 in Kamchatka. Earthquake-related deaths from other quakes were reported from Costa Rica, Iran, Japan, Turkey, the Philippine Islands, and Sicily.
\nIn the United States, aftershocks continued in the Coalinga, California, area; the largest was a magnitude (M) 6.0 on July 21. A magntidue 6.3 earthquake occurred in southern Alaska on July 12.
","language":"English","publisher":"U.S Geological Survey","usgsCitation":"Person, W., 1984, Earthquakes, July-August 1983: Earthquake Information Bulletin (USGS), v. 16, no. 1, p. 34-39.","productDescription":"6 p.","startPage":"34","endPage":"39","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":318603,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56dabfc6e4b015c306f84c4a","contributors":{"authors":[{"text":"Person, W. J.","contributorId":91472,"corporation":false,"usgs":true,"family":"Person","given":"W. J.","affiliations":[],"preferred":false,"id":621989,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}