Geology of Kapingamarangi Atoll, Caroline Islands
Edwin D. McKee
1958, GSA Bulletin (69) 241-278
Kapingamarangi Atoll of the Caroline Islands consists of a peripheral reef, 1000-4000 feet across, surrounding a nearly circular lagoon which is 5 by 6 nautical miles in area and about 240 feet at maximum depth. Thirty-three islands, most of which are less than half a mile in length, are scattered...
Flowtill in Southeastern Massachusetts
J. H. Hartshorn
1958, GSA Bulletin (69) 477-482
No abstract available....
Geology of the north half of the Mt. Abbot quadrangle, Sierra Nevada, California
D. G. Sherlock, Warren Hamilton
1958, GSA Bulletin (69) 1245-1268
The north half of the 15-minute Mt. Abbot quadrangle lies across the crest of the Sierra Nevada. The Cretaceous granitic rocks that underlie most of the area form eight large discordant plutons that range from quartz diorite to alaskite; the largest pluton is coarse prophyritic quartz monzonite. Pre-batholithic metasedimentary and...
Recent underwater surveys using low-frequency sound to locate shallow bedrock
W. O. Smith
1958, GSA Bulletin (69) 69-98
Underwater investigations at Lake Mead, Chicago, Passamaquoddy Bay, and on Long Island established the characteristics of sound waves that can be used in shallow geophysical exploration by the sonar method.At Lake Mead the sediments were for the most part clay of high water content which was easily penetrated by low-power...
The relation of phosphorites to ground water in Beaufort County, North Carolina
P.M. Brown
1958, Economic Geology (53) 85-101
Recent ground-water studies undertaken by the U.S. Geological Survey in cooperation with the North Carolina Division of Mineral Resources have delineated phosphorite deposits, tentatively regarded as being of middle Miocene age, in Beaufort County. These deposits lie unconforma-bly on limestone of Eocene age and are unconformably overlain by late Miocene...
Minerals of the cassiterite-bearing veins at Irish Creek, Virginia, and their paragenetic relations
Jewell J. Glass, A. H. Koschmann, John Stewart Vhay
1958, Economic Geology (53) 65-84
Major rock types of the Irish Creek district are gneisses and schists, intruded by granodiorite. All these rocks are believed to be Precambrian. The ore deposits are fissure veins consisting largely of quartz veins bordered by greisen, and enriched by recurrent deposition. From field and microscopic evidence six stages of...
Uranium deposits under conglomeratic sandstone of the Morrison Formation, Colorado and Utah
D. A. Phoenix
1958, GSA Bulletin (69) 403-418
In southwestern Colorado and southeastern Utah, strata of conglomeratic sandstone are localized at the base of the Brushy Basin Member of the Morrison Formation of Jurassic age. These discrete lithologic units contain sedimentary structures oriented in a prevailing easterly direction. They are believed to cover about one-third of the underlying...
Stratigraphy of Upper Pennsylvanian and lower Permian rocks in the Sand Canyon area, Otero County, New Mexico
George O. Bachman, Philip T. Hayes
1958, GSA Bulletin (69) 689-700
The Magdalena Group of Pennsylvanian age and, in ascending order, the lower tongue of the Abo Sandstone (herein named the Danley Ranch Tongue), the Hueco Limestone, the upper tongue of the Abo Sandstone (herein named the Lee Ranch Tongue), and the Yeso Formation of Permian age are well displayed in...
Contact metamorphism adjacent to a teschenite intrusion
Howard G. Wilshire
1958, Journal of the Geological Society of Australia (6) 11-20
Shale adjacent to the upper contact of an annular teschenite intrusion was converted to andalusite hornfels in an aureole 2–4 feet wide. At some points along the contact there is no evidence of anhydrous recrystallization. Rarely, magmatic reaction with small shale xenoliths resulted in formation of cordierite‐sillimanite (?) hornfelses, and...
Radiotracer experiments in the Mohawk River, New York, to study sewage path and dilution
Eugene S. Simpson, W. Arthur Beetem, F. H. Ruggles
1958, Eos, Transactions, American Geophysical Union (39) 427-433
Sewage from the Knolls Atomic Power Laboratory near Schenectady, N. Y., was dosed with 4.53 curies of P prior to discharge into the Mohawk River. Its pattern of diffusion was measured in the river with immersible GM‐tubes and by sampling. The initial path of sewage was strongly influenced by differences...
Application of statistical methods to the analysis of ground‐water levels
Irwin Remson, J.R. Randolph
1958, Eos, Transactions, American Geophysical Union (39) 75-83
Valuable hydrologic information can be obtained from statistical analysis of water‐level trends. The time‐series and the functional‐equation approaches are applied to New Jersey well records representing different hydrologic conditions. The results are valuable as concise summaries of the records, for extrapolating observed data, for interpolating between measurements, and for estimating...
Reconnaissance study of erosion and deposition produced by the flood of August 1955 in Connecticut
M. Gordon Wolman, J.P. Eiler
1958, Eos, Transactions, American Geophysical Union (39) 1-14
A large area in the valley bottoms in Connecticut was inundated by the flood of August 1955. Relative to the total area flooded that part permanently modified by the flow was surprisingly small. Although great in some places, the distribution of these permanent modifications of channel and flood plain was...
Lower ordovician section near Chambersburg, Pennsylvania
William Jasper Sando
1958, GSA Bulletin (69) 837-854
The Lower Ordovician series (Beekmantown group) is at least 3500 feet thick near Chambersburg, Pennsylvania, approximately 1200 feet thicker than was earlier estimated. Reverse faulting in the upper part of the section may have obscured the youngest Early Ordovician and oldest Middle Ordovician beds in the area, so that the...
Technique for the extraction and partial chemical analysis of fluid-filled inclusions from minerals
Edwin Roedder
1958, Economic Geology (53) 235-269
A method has been developed for the extraction and limited chemical analysis of the materials in solution in the fluid from the very minute fluid-filled inclusions such as commonly occur in whitish or milky quartz. The method may also be applied, with some reservations, to a variety of other minerals....
Design of simple punched card systems with reference to geochemical problems
Irving A. Breger
1958, Economic Geology (53) 325-338
A number of critical factors should be considered in the design of files using marginally punched cards. These factors are discussed in general terms and exemplified by reference to a system developed for use in geo-chemical studies....
Limestone aquifers of Maryland
Edmond G. Otton, Claire A. Richardson
1958, Economic Geology (53) 722-736
Limestone rocks are an important source of ground water in the Piedmont and Appalachian areas of Maryland. The major limestone aquifers are the Cockeysville and Wakefield marbles and the Silver Run, Tomstown, Frederick, Grove, Waynesboro, Elbrook, Conococheague, Beekmantown, Stones River, Tonoloway, Helderberg and Greenbrier formations. Drilled and dug wells and...
Titaniferous sedimentary rocks in the Cuyuna district, central Minnesot
R. G. Schmidt
1958, Economic Geology (53) 708-721
The ore-yielding main iron-formation of the Cuyuna district is strati-graphically overlain by approximately 300 feet of titaniferous sedimentary rocks, and a field test for titahia has been an effective supplement to customary stratigraphic studies. The titanium is in leucoxene. The sedimentary rocks of the district are highly folded, and the...
Correlation of ground-water levels and air temperatures in the winter and spring in Minnesota
Robert Schneider
1958, Technical Paper 1
No abstract available....
Mass control of insects: The effects on fish and wildlife
Oliver B. Cope, Paul F. Springer
1958, Bulletin of the Entomological Society of America (4) 52-56
The mass control of insects carried on during the past ten years has made possible the economical suppression and, in a few instances, the near eradication of pest insect populations over widespread areas. These large operations, usually featuring the use of the airplane for applying insecticides quickly and cheaply, have...
The thermal regime of an Arctic lake
Max C. Brewer
1958, Eos, Transactions, American Geophysical Union (39) 278-284
Much of the Arctic coastal plain in Alaska is covered by shallow lakes. Those in the Barrow area, which are believed to be representative of most of the lakes in the coastal plain, are generally either two to three feet or six to nine feet deep. The shallow lakes can...
Operator's manual on the visual-accumulation tube method for sedimentation analysis of sands
V.C. Colby, F.W. Witzgman
1958, Report
The visual-tube method for sedimentation analysis of sands was developed as a part of the general investigation titled "A Study of Methods Used in Measurement and Analysis of Sediment Loads in Streams." The method is one answer to the need for a simple, rapid, and inexpensive means of determining the sedimentation-size...
Nickel-gold ore of the mackinaw mine, Snohomish County, Washington
C. Milton, D.J. Milton
1958, Economic Geology (53) 426-447
The Mackinaw mine ore is of an unusual or unique type, consisting chiefly of niccolite, maucherite, pentlandite, chalcopyrite, cubanite, and magnetite in an altered peridotite. Valleriite, gold and sphalerite are minor primary minerals; chalcocite and violarite or bravoite are supergene minerals. Pyrrhotite and pyrite are absent. From the textural relations...
An epizootic among eider ducks involving an acanthocephalid worm
G. M. Clark, D. O’Meara, J.W. VanWeelden
1958, Journal of Wildlife Management (22) 204-205
No abstract available. ...
Preliminary geologic map of the Clay Hills 2 SW Quadrangle, San Juan County, Utah
Thomas E. Mullens
1958, Trace Elements Memorandum 1092
No abstract available...
Photogeologic map of the Coach Creek SE Quadrangle, Grand County, Utah, and Mesa County, Colorado
R.J. Hackman
1958, Trace Elements Memorandum 1077
No abstract available...
