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Page 5366, results 134126 - 134150

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Map accuracy
U.S. Geological Survey
1981, Report
An inaccurate map is not a reliable map. "X" may mark the spot where the treasure is buried, but unless the seeker can locate "X" in relation to known landmarks or positions, the map is not very useful....
APSRS state-base graphics
Water Resources Division, U.S. Geological Survey
1981, Report
The National Cartographic Information Center (NCIC) is the information branch of the U.S. Geological Survey's National Mapping Division. In order to organize and distribute information about U.S. aerial photography coverage and to help eliminate aerial mapping duplication by tracking individual aerial projects, NCIC developed the Aerial Photography Summary Record System...
Canyon Creek: A late Pleistocene vertebrate locality in interior Alaska
F. R. Weber, T. D. Hamilton, D.M. Hopkins, C.A. Repenning, H. Haas
1981, Quaternary Research (16) 167-180
The Canyon Creek vertebrate-fossil locality is an extensive road cut near Fairbanks that exposes sediments that range in age from early Wisconsin to late Holocene. Tanana River gravel at the base of the section evidently formed during the Delta Glaciation of the north-central Alaska Range. Younger layers and lenses of...
Dated wood from Alaska and the Yukon: Implications for forest refugia in Beringia
D.M. Hopkins, P.A. Smith, J.V. Matthews Jr.
1981, Quaternary Research (15) 217-249
Postulations on the existence of forest refugia in parts of Beringia during the last glacial have been, in large part, based on ambiguous evidence. Existing data on radiocarbon-dated and identified fossil wood and macrofossils from Alaska and northwest Canada are synthesized here and are augmented by results of palynological studies...
Rock-weathering rates as functions of time
Steven M. Colman
1981, Quaternary Research (15) 250-264
The scarcity of documented numerical relations between rock weathering and time has led to a common assumption that rates of weathering are linear. This assumption has been strengthened by studies that have calculated long-term average rates. However, little theoretical or empirical evidence exists to support linear rates for most chemical-weathering...
Obsidian hydration dating of volcanic events
I. Friedman, J. Obradovich
1981, Quaternary Research (16) 37-47
Obsidian hydration dating of volcanic events had been compared with ages of the same events determined by the 14C and K-Ar methods at several localities. The localities, ranging in age from 1200 to over 1 million yr, include Newberry Craters, Oregon; Coso Hot Springs, California; Salton Sea, California; Yellowstone National...
The sedimentary framework of the southern basin of Lake George, New York
D. R. Hutchinson, W.M. Ferrebee, H.J. Knebel, R. J. Wold, Y.W. Isachsen
1981, Quaternary Research (15) 44-61
Information from 240 km of high-resolution seismic reflection profiles has been analyzed to show the bathymetric and subsurface configuration of southern Lake George in the southeastern corner of the Adirondack Mountains, New York. Three units have been identified and sampled in 13 piston cores as long as 7 m and...
Geologic evidence for age of deposits at Hueyatlaco archeological site, Vasequillo, Mexico
V. Steen-McIntyre, R. Fryxell, H.E. Malde
1981, Quaternary Research (16) 1-17
Direct tracing of beds during excavation in May 1973, confirmed that the artifact-bearing layers at Hueyatlaco underlie 10 m of fine-grained, water-laid deposits that constitute part of the wide-spread Valsequillo gravels. Dissection of these deposits by the adjacent Río Atoyac has reached a depth of 50 m. The stratigraphic section...
The terminal Eocene event and the Polish connection
J. A. Van Couvering, M.-P. Aubry, W.A. Berggren, J.P. Bujak, C. W. Naeser, T. Wieser
1981, Palaeogeography, Palaeoclimatology, Palaeoecology (36) 321-362
The Eocene/Oligocene boundary in Europe is marked by major discontinuities in all environments: the “Grande Coupure” in continental mammals; the elimination of semitropical elements from high-latitude floras; the virtually complete replacement of the shallow-marine malacofauna; and an extraordinary downslope excursion of carbonate deposition in deep-ocean basins (drop in the CCD)....
Aftershocks of the June 20, 1978, Greece earthquake: A multimode faulting sequence
David Carver, G. A. Bollinger
1981, Tectonophysics (73) 343-363
A 10-station portable seismograph network was deployed in northern Greece to study aftershocks of the magnitude (mb) 6.4 earthquake of June 20, 1978. The main shock occurred (in a graben) about 25 km northeast of the city of Thessaloniki and caused an east-west zone of surface rupturing 14 km long...
Monoclinal bending of strata over laccolithic intrusions
F.G. Koch, A. M. Johnson, D. D. Pollard
1981, Tectonophysics (74) T21-T31
Sedimentary strata on top of some laccolithic intrusions are nearly horizontal and little deformed, but are bent into steeply dipping monoclinal flexures over the peripheries of these intrusions. This form of bending is not explained by previous theories of laccolithic intrusion, which predict either horizontal undeformed strata over the center...
Gravitational potential as a source of earthquake energy
L. Barrows, C.J. Langer
1981, Tectonophysics (76) 237-255
Some degree of tectonic stress within the earth originates from gravity acting upon density structures. The work performed by this "gravitational tectonics stress" must have formerly existed as gravitational potential energy contained in the stress-causing density structure. According to the elastic rebound theory (Reid, 1910), the energy of earthquakes comes...
Contemporary doming of the Adirondack Mountains: Further evidence from releveling
Y.W. Isachsen
1981, Tectonophysics (71) 95-96
The Adirondack Mountains constitute an anomalously large, domical uplift on the Appalachian foreland. The dome has a NNE—SSW axis about 190 km long, and an east—west dimension of about 140 km. It has a structural relief of at least 1600 m, and a local topographic relief of up to 1200...