Book Chapters
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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.
Filter Total Items: 6173
Models of grades and tonnages of some lode tin deposits Models of grades and tonnages of some lode tin deposits
Descriptive and grade/tonnage models have recently been built for many types of deposits. Such models consist of descriptions of mineralogy, host rocks, ore textures, controls, alteration, geochemical signatures, age, and tectonic settings, together with statistical models of grades, tonnages, and contained metal of deposits of each type. The models are used to identify areas that may...
Authors
W. D. Menzie, B.L. Reed, Donald A. Singer
Movements of translocated wolves in Minnesota Movements of translocated wolves in Minnesota
No abstract available.
Authors
S. H. Fritts, W.J. Paul, L.D. Mech
Oil and gas potential of island arcs in the Southwest Pacific: a new frontier Oil and gas potential of island arcs in the Southwest Pacific: a new frontier
No abstract available
Authors
H. G. Greene, D.W. Scholl, J. G. Vedder, F. L. Wong
Organochlorine pollutants in plasma of spring migrant peregrine falcons from coastal Texas, 1984 Organochlorine pollutants in plasma of spring migrant peregrine falcons from coastal Texas, 1984
No abstract available.
Authors
Charles J. Henny, K.E. Riddle, C.S. Hulse
Organochlorines in Alaskan peregrine falcon eggs and their current impact on productivity Organochlorines in Alaskan peregrine falcon eggs and their current impact on productivity
No abstract available.
Authors
Robert E. Ambrose, Charles J. Henny, R. E. Hunter, J.A. Crawford
Ornitologia. Preliminary Field Report Ornitologia. Preliminary Field Report
No abstract available.
Authors
M.S. Foster
Overview of nongame bird survey techniques Overview of nongame bird survey techniques
No abstract available.
Authors
C.S. Robbins
Peregrine falcon Peregrine falcon
Since 1975, 101 peregrine falcon breeding sites have been documented in Arizona, New Mexico and western Texas. Eyries were found in either riverine or montane canyons, habitats which supported dense and diverse avian prey and provided structural characteristics that may increase prey vulnerability. Approximately 85% of the sites visited each year were occupied. Egg-laying (mid-February...
Authors
R.W. Skaggs, D. H. Ellis, W.G. Hunt, T.H. Johnson
Persistent toxic substances and the health of fish communities in the Great Lakes Persistent toxic substances and the health of fish communities in the Great Lakes
The role, if any, of toxic substances in bringing about changes in the productivity and status of fishery resources, is not well understood. At the 'Workshops on Persistent Toxic Substances and the Health of the Aquatic Community,' the Fish Biota Discussion Subgroup considered the issue of toxic substances by responding to the three questions addressed to it by the Workshop Organizing...
Authors
Wayne A. Willford