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Page 5158, results 128926 - 128950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Phosphatic Permian rocks of the Adobe Range, Nevada, and their environment of deposition
Keith Brindley Ketner
1979, Open-File Report 79-239
Permian sedimentary rocks in the Adobe range, northern Nevada, are phosphatic, and although the particles of phosphate are relatively more disseminated, they closely resemble the rocks of the Phosphoria Formation. In the northern Adobe Range, where the entire Permian sequence is approximately correlative with the Phosphoria Formation, it is 200...
Upper Cenozoic deposits of the central Delmarva Peninsula, Maryland and Delaware
James Patrick Owens, Charles Storrow Denny
1979, Professional Paper 1067-A
The surface and shallow subsurface sediments of the lower Delmarva Peninsula include beds ranging in age from Miocene to Holocene. The oldest beds appear to be typical shelf deposits of the Chesapeake Group (Calvert-Choptank age). These marine units are overlain by deltaic deposits, which range from fluviatile facies in the...
Key to the common marine molluscs of Texas
Gary W. Hill
1979, Open-File Report 79-969
A dichotomous key is developed which provides the investigator a means for identifying the common marine molluscs on the Texas coast. The key is written as to allow the user to stop or begin at any desired taxonomic level (class, order, superfamily, family, genus, species) depending on prior knowledge or...
1978 annual index of current earthquake literature
M. L. Prepared by Gunn, L. Addis, W.H.K. Lee
1979, Open-File Report 79-396
In the past several years, earthquake research has been greatly accelerated in China, Japan, USSR, and the United States. Presently, about 2,500 earthquake-related publications (including meeting abstracts) are produced yearly. In order to keep up with this current literature, a computer based bibliographic system was implemented as part of a...
Magnitudes, nature, and effects of point and nonpoint discharges in the Chattahoochee River Basin, Atlanta to West Point Dam, Georgia
J. K. Stamer, Rodney N. Cherry, R.E. Faye, R.L. Kleckner
1979, Water Supply Paper 2059
During the period April 1975 to June 1978, the U.S. Geological Survey conducted a river-quality assessment of the Upper Chattahoochee River basin in Georgia. One objective of the study was to assess the magnitudes, nature, and effects of point and non-point discharges in the Chattahoochee River basin from Atlanta to...
The Parsonsburg Sand in the central Delmarva Peninsula, Maryland and Delaware
Charles Storrow Denny, J. P. Owens, L.A. Sirkin, Meyer Rubin
1979, Professional Paper 1067-B
The Parsonsburg Sand, a surface sand largely of Wisconsin age, caps terraces east of some of the major streams and mantles broad areas on the uplands of the central Delmarva Peninsula, Maryland and Delaware. The main body of the formation east and south of Salisbury, Md., ranges from 1.25 to...
Detection and mapping of hydrothermally altered rocks in the vicinity of the Comstock Lode, Virginia Range, Nevada, using enhanced Landsat images
Roger P. Ashley, Alexander F.H. Goetz, L. C. Rowan, M. J. Abrams
1979, Open-File Report 79-960
The Virginia Range, immediately southeast of Reno, Nev., consists mainly of flows, breccias, and turfs of Miocene age. Most of these volcanic rocks are of intermediate composition; rhyodacite is the most common rock type. Basalt, rhyolite and rhyolite tuff, and tuffaceous sedimentary rocks of Miocene and Pliocene age also cover...
Surveying Antarctica: from dogsled to satellite
Richard S. Williams Jr.
1979, Air and Space (3) 3-4
Base maps of Antarctica are needed at scales of 1:250,000 to plot scientific data, yet after 20 years of a major mapping effort, only about 20 percent of the continent has been accurately mapped using aerial photographs and ground surveys. Encompassing nearly 14.3 million square kilometers (5.5 million square miles),...
Satellite-aided evaluation of population exposure to air pollution
William J. Todd, Anthony J. George Jr., Nevin A. Bryant
1979, Environmental Science & Technology (13) 970-974
The Clean Air Act Amendments of 1977 set schedules for states to implement regional, spatial assessments of air quality impacts. Accordingly, the U.S. Environmental Protection Agency recently published guidelines for quantifying population exposure to adverse air quality impact by using air quality and population data by census tracts. Our research...
Satellites monitor Atlanta regional development
William J. Todd, C.C. Blackmon, R.G. Rudasill Jr.
1979, Practicing Planner (9) 6-10
Since the adoption of a Regional Development Plan in 1975, the Atlanta Regional Commission has investigated methods for monitoring regional development patterns in a periodic, efficient manner. A promising approach appears to be the use of Landsat satellite data. In cooperation with the Earth Resources Observation Systems (EROS) Data Center,...
Inventory and mapping of flood inundation using interactive digital image analysis techniques
Wayne G. Rohde, Charles A. Nelson, J. V. Taranik
1979, Canadian Journal of Remote Sensing (5) 43-52
LANDSAT digital data and color infra-red photographs were used in a multiphase sampling scheme to estimate the area of agricultural land affected by a flood. The LANDSAT data were classified with a maximum likelihood algorithm. Stratification of the LANDSAT data, prior to classification, greatly reduced misclassification errors. The classification results...