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At least 1,747 records · Page 97Linked to original sources
USGS1973

The benthic fauna of the Northern Bering Sea

The shelled benthic fauna of the northern Bering Sea has been extensively sampled and the taxonomy, distribution and functional role of 105 species of mollusks, two species of barnacles, two species of echinoids and one species of brachiopod havet4pen examined: The major benthic communities were evaluated by cluster analysis. They are: the Balanus rostratus alaskensis community which inhabits cobble or gravel substrates; the Tellina lutea alternidentata community which is limited to areas of clean sand; the Clinocardium ciliatum community which is found on silty-sand substrates; and the Macoma balthica community which inhabits the brackish coastal lagoons. These associations were compared with the classic boreal benthic communities of Peterson & Thorson. Although the Bering Sea fauna is compositionally similar to the Scandinavian, the species associations differ markedly. These differences are believed to be due to substrate differences. The Bering Sea sediments are more poorly sorted and patchily distributed than those of Scandinavian waters.

Open-File Report↗
USGS1969

Sediment Transport in Streams in the Umpqua River Basin, Oregon

This report presents tables of suspended-sediment data collected from 1956 to 1967 at 10 sites in the Umpqua River basin. Computations based on these data indicate that average annual suspended-sediment yields at these sites range from 137 to 822 tons per square mile. Because available data for the Umpqua River basin are generally inadequate for accurate determinations of sediment yield and for the definition of characteristics of fluvial sediments, recommendations are made for the collection and analysis of additional sediment data.

Oregon↗
USGS1984

The study of buried drift aquifers in Minnesota by seismic geophysical methods

Buried-drift aquifers are stratified sand and (or) gravel aquifers in glacial deposits that cannot be seen or inferred at the land surface. During the Pleistocene Epoch, four continental glaciations advanced and retreated across Minnesota, blanketing the bedrock surface with drift as much as 700 feet thick (fig. 1). Most of the drift consists of till, an unsorted, un-stratified mixture of clay silt, sand, and gravel that usually is not considered to be an aquifer. Permeable, stratified sand and gravel, deposited as outwash, alluvium, and (or) ice-contact deposits usually during an earlier glacial episode and subsequently covered (buried) with till, form the buried-drift aquifers.

Minnesota↗
USGS1974

Hydrologic data for Little Elm Creek, Trinity River Basin, Texas, 1972

The U.S. Soil Conservation Service is actively engaged in the installation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found a total of approximately 3,500 floodwater-retarding structures to be physically and economically feasible in Texas. As of. September 30, 1972, 1,551 of these structures had been built.

Texas↗
USGS1974

Hydrologic data for Pin Oak Creek, Trinity River Basin, Texas, 1972

The U.S. Soil Conservation Service is actively engaged in the installation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found a total of approximately 3,500 floodwater-retarding structures to be physically and economically feasible in Texas. As of September 30, 1972, 1,551 of these structures had been built.

Texas↗