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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Lower Eocene calcareous nannofossil biostratigraphy beneath the Atlantic slope and upper rise off New Jersey: new zonation based on Deep Sea Drilling Project sites 612 and 613 Lower Eocene calcareous nannofossil biostratigraphy beneath the Atlantic slope and upper rise off New Jersey: new zonation based on Deep Sea Drilling Project sites 612 and 613
No abstract available.
Authors
Page C. Valentine
Lower Paleozoic carbonate rocks of the Baird Mountains quadrangle, western Brooks Range, Alaska Lower Paleozoic carbonate rocks of the Baird Mountains quadrangle, western Brooks Range, Alaska
Lower Paleozoic carbonate rocks in the Baird Mountains quadrangle form a relatively thin, chiefly shallow-water succession that has been thrust-faulted and metamorphosed to blueschist and greenschist facies. Although this succession was thought to be mostly Devonian until recently, a large part of it is in fact pre-Silurian in age. Middle and Upper Cambrian rocks - the first confirmed in...
Authors
Julie A. Dumoulin, Anita G. Harris
Owl telemetry techniques Owl telemetry techniques
No abstract available.
Authors
T.H. Nicholls, M.R. Fuller
Pelecaniform feeding ecology Pelecaniform feeding ecology
No abstract available.
Authors
R.W. Schreiber, R. B. Clapp
Population models and crocodile management Population models and crocodile management
No abstract available.
Authors
J.D. Nichols
Raptor survey techniques Raptor survey techniques
No abstract available.
Authors
M.R. Fuller, J. A. Mosher
Regional unconformities cored on the New Jersey continental slope Regional unconformities cored on the New Jersey continental slope
No abstract available.
Authors
C. Wylie Poag, Doris Low
Relationships between nesting populations of wading birds and habitat features along the Atlantic Coast Relationships between nesting populations of wading birds and habitat features along the Atlantic Coast
Using previously published atlas data for 122 mixed-species wading bird colonies on islands along the Atlantic coast (Maine to Florida, 1976-77), we examined relationships between population sizes of 11 species of egrets, herons, ibises, and wood storks (Mycteria americana) and nine habitat variables. On nautical charts, we measured four island characteristics (area, length, width, shape...
Authors
R.M. Erwin, J. A. Spendelow, P.H. Geissler, B. Kenneth Williams
Resource assessments, geologic deposit models, and offshore minerals with an example of heavy-mineral sands Resource assessments, geologic deposit models, and offshore minerals with an example of heavy-mineral sands
A resource assessment method for offshore minerals based on descriptive and grade-tonnage models is proposed. Historical development and applications of this method are summarized. Based on this approach, descriptive and quantitative deposit models for strand-line titanium placer deposits have been developed. Descriptive statistics were also computed using the worldwide deposit data set...
Authors
Emil D. Attanasi, J. H. DeYoung, E. R. Force, Andrew Grosz
Resurrection Peninsula and Knight Island ophiolites and recent faulting on Montague Island, southern Alaska Resurrection Peninsula and Knight Island ophiolites and recent faulting on Montague Island, southern Alaska
The Resurrection Peninsula forms the east side of Resurrection Bay (Fig. 1). The city of Seward is located at the head of the bay and can be reached from Anchorage by highway (127 mi;204 km). Relief ranges from 1,434 ft (437 m) at the southern end of the peninsula to more than 4,800 ft (1,463 m) 17 mi (28 km) to the north. All rock units composing the informally named Resurrection...
Authors
Steven W. Nelson, Marti L. Miller, Julie A. Dumoulin
Seasonal metabolic and reproductive cycles in wolves Seasonal metabolic and reproductive cycles in wolves
No abstract available.
Authors
U.S. Seal, E.D. Plotka, L.D. Mech, J.M. Packard