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Not all publications have extents, not all extents are completely accurate
Petrography and stratigraphy of glacial drift, Mesabi-Vermilion Iron Range area, northeastern Minnesota
Thomas C. Winter, R. D. Cotter, H. L. Young
1973, Bulletin 1331-C
Glacial deposits in the Mesabi-Vermilion Iron Range area consist of four major till units and associated glaciofluvial sediments. Particle-size data and pebble, heavy-mineral, clay-mineral, and percentage-soluble content were used in addition to field description of color and texture to describe and correlate the drift units. The lowermost till unit, basal till,...
The role of the Bureau of Sport Fisheries and Wildlife in the Great Lakes
F. Eugene Hester
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Ecological blunders of man, such as timber exploitation, draining of wetlands, construction of canals and dams, and pollution have been mainly responsible for serious environmental degradation and catastrophic losses of fish and wildlife values in the Great Lakes Basin. Consequently, the major emphasis of the Bureau of Sport Fisheries and...
Federal Great Lakes fishery research objectives, priorities, and projects
Howard D. Tait
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Fishery productivity of the Great Lakes has declined drastically since settlement of the area. Premium quality fishes of the Great Lakes such as whitefish, lake trout, and walleyes have been replaced by less desired species. This change is attributed to selective overfishing, pollution, and the extreme instability of fish populations....
Selected hydrologic data, lower Bear River drainage basin, Box Elder County, Utah
L.J. Bjorklund, L. J. McGreevy
1973, Utah Basic-Data Release 23
This report presents selected basic data from a study of the ground- water resources of the lower Bear River drainage basin, Box Elder County, Utah. The study was made during 1970-72 by the U.S. Geological Survey in cooperation with the Utah Department of Natural Resources, Division of Water Rights. Incorporated...
Drought displaced movement of North American pintails into Siberia
Charles J. Henny
1973, Journal of Wildlife Management (37) 23-29
During the years 1954-70, 230 pintails (Anas acuta) banded in North America were reported from eastern Asia, primarily Siberia. Most of the birds were shot on the breeding grounds in May. The movement into eastern Asia of pintails banded in the interior of North America was directly correlated with the...
Permafrost
Water Resources Division, U.S. Geological Survey
1973, Report
Autographic theme extraction
D. Edson, Alden P. Colvocoresses
1973, Report
Remote-sensor images, including aerial and space photographs, are generally recorded on film, where the differences in density create the image of the scene. With panchromatic and multiband systems the density differences are recorded in shades of gray. On color or color infrared film, with the emulsion containing dyes sensitive to...
Tree rings : timekeepers of the past
Water Resources Division, U.S. Geological Survey
1973, Report
A casual look at the top of a tree stump reveals that it is composed of a series of concentric rings-tree rings -that become larger and larger in diameter outward from the center of the stump. Because a single tree ring is usually formed each year, the age of the...
Ferdinand Vandiveer Hayden and the founding of the Yellowstone National Park
Water Resources Division, U.S. Geological Survey
1973, Report
Following the Civil War, the United States intensified the exploration of her western frontiers to gain a measure of the vast lands and natural resources in the region now occupied by our Rocky Mountain States. As part of this effort, the U.S. Geological and Geographical Survey of the Territories was...
Snowy owl predation on lapland longspur nestlings recorded on film
T. W. Custer
1973, The Auk (90) 433-435
 During the summer of 1971 I investigated the breeding biology of the Lapland Longspur, Calcarius lapponicus, near Barrow, Alaska. To obtain data on incubation and feeding patterns of nesting longspurs, time-lapse cameras (Minolta Autopak-8 D6 super-8 movie cameras equipped with an Intervalometer-P time-lapse device) were positioned at several nests throughout...