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: 6197
General philosophy 3: Concerning modeling General philosophy 3: Concerning modeling
The trend toward modeling is a healthy change from the days when “prospects” were located solely on the basis of closures on residual maps of mysterious and sometimes secret origin. Although residual maps are valuable for helping us notice unusual relationships, the business of exploration has become less tolerant of anything that raises more questions than it answers. A flurry of...
Authors
D. A. Chapin
General philosophy 4 General philosophy 4
I offer these statements about the interpretation process: A contractor's job often consists of enhancing potential-field data to make them as interpretable as possible (by either the contractor or the client). In getting data ready for interpretation, I like to confine the work to “atural processes” and avoid arbitrary processes. I see too many people abusing the facilities available in...
Authors
D. A. Chapin
Sources of magnetic anomalies over a sedimentary basin: preliminary results from the coastal plain of the Arctic National Wildlife Refuge, Alaska Sources of magnetic anomalies over a sedimentary basin: preliminary results from the coastal plain of the Arctic National Wildlife Refuge, Alaska
No abstract available.
Authors
J. D. Phillips, R. W. Saltus, R. L. Reynolds
The reproductive success of lake herring in habitats near shipping channels and ice-breaking operations in the St. Marys River, Michigan, USA The reproductive success of lake herring in habitats near shipping channels and ice-breaking operations in the St. Marys River, Michigan, USA
A study of the reproductive success of lake herring (Coregonus artedi) in the St. Marys River was conducted in the winters and springs of 1994, 1995, and 1996. The St. Marys River connects Lake Superior to the lower Great Lakes making it an important route for ship traffic. Recent pressure by commercial carriers to extend the shipping season by breaking ice earlier in spring, has raised...
Authors
Marc A. Blouin, M.M. Kostich, T. N. Todd, J.F. Savino
Biogeochemical cycles of nitrogen, phosphorus, and sulfur: Natural distributions and response to disturbance Biogeochemical cycles of nitrogen, phosphorus, and sulfur: Natural distributions and response to disturbance
No abstract available.
Authors
M.E. McClain, Richard E. Bilby, F.J. Triska
Sources and age of aquatic humus Sources and age of aquatic humus
As aquatic scientists have recognized the diversity of processes controlled by or dependent upon aquatic humus, it has become important to learn more about the genesis, chemical properties, and concentration of humic substances in aquatic ecosystems. There are three classes of aquatic humus (fulvic acids, humic acids, and humin), all of which share the characteristics of being...
Authors
Diane M. McKnight, George R. Aiken
Buoyancy characteristics of the bloater (Coregonus hoyi) in relation to patterns of vertical migration and acoustic backscattering Buoyancy characteristics of the bloater (Coregonus hoyi) in relation to patterns of vertical migration and acoustic backscattering
Acoustic studies in Lake Michigan found that bloaters (Coregonus hoyi) were less reflective per size than the other major pelagic species. This difference in in situ acoustic backscattering could indicate that the deep-water bloaters have compressed swimbladders for much of their vertical range with related implications on buoyancy. To test this hypothesis, the buoyancy characteristics...
Authors
Guy W. Fleischer, Leslie M. TeWinkel
The compilation and application of aeromagnetic data for hydrocarbon exploration in interior Alaska The compilation and application of aeromagnetic data for hydrocarbon exploration in interior Alaska
No abstract available.
Authors
J.F. Meyer, L.J. Racic, R. W. Saltus
Characterization of an old-growth bottomland hardwood wetland forest in Northeast Texas: Harrison Bayou Characterization of an old-growth bottomland hardwood wetland forest in Northeast Texas: Harrison Bayou
Most wetland losses in the southern region over the past 200 years have occurred in bottomland hardwood forests. By 1980 the original extent of palustrine bottomland in Texas had been reduced by 63%, from roughly 16 to 6 million acres. Additional losses have occurred during more recent years as a result of conversion to agriculture and timber harvests; these factors and the need to...
Authors
Laurence C. Walker, Thomas Brantley, Virginia Burkett
Tectonic geomorphology and paleoseismology of the Septentrional fault system, Dominican Republic Tectonic geomorphology and paleoseismology of the Septentrional fault system, Dominican Republic
No abstract available.
Authors
Paul Mann, Carol S. Prentice, G. Burr, Luis R. Pena, F. W. Taylor
Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. IV. Characterization of humic and fulvic acids extracted from senescent leaves Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. IV. Characterization of humic and fulvic acids extracted from senescent leaves
No abstract available.
Authors
Robert L. Wershaw, K. R. Kennedy
Regional characteristics, tilt domains, and extensional history of the later Cenozoic Basin and Range Province, western North America Regional characteristics, tilt domains, and extensional history of the later Cenozoic Basin and Range Province, western North America
No abstract available.
Authors
John H. Stewart