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Water resources data for Louisiana, water year 1980: Volume 2. Southern Louisiana
Water Resources Division, U.S. Geological Survey
1980, Water Data Report LA-80-2
Water resources data for the 1980 water year for Louisiana consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground water. This report, in three volumes, contains records for water discharge at...
Geophysical-geological analysis of Fairfax County, Virginia
David L. Daniels
1980, Open-File Report 80-1165
Aeromagnetic, aeroradioactivity, and gravity surveys of Fairfax County, Virginia, are interpreted with the aid of existing geologic data and local geophysical measurements. Highly magnetic metasedimentary rocks of the Peters Creek Schist and Sykesville Formation produce most of the magnetic anomalies of Fairfax County. In contrast, the granitoid rocks of the...
Ordovician and Silurian Phi Kappa and Trail Creek formations, Pioneer Mountains, central Idaho: Stratigraphic and structural revisions, and new data on graptolite faunas
James H. Dover, William B. N. Berry, Reuben James Ross Jr.
1980, Professional Paper 1090
Recent geologic mapping in the northern Pioneer Mountains combined with the identification of graptolites from 116 new collections indicate that the Ordovician and Silurian Phi Kappa and Trail Creek Formations occur in a series of thrust-bounded slices within a broad zone of imbricate thrust faulting. Though confirming a deformational style...
Ground-water levels in selected well fields and in west-central Florida, September 1980
D. K. Yobbi, L. R. Mills, W. M. Woodham
1980, Open-File Report 81-77
The water table in the surficial aquifer and the potentiometric surface of the Floridan aquifer in a 1,200-square-mile area in west-central Florida are mapped semiannually by the U.S. Geological Survey. Maps are based on water levels measured in wells each May to coincide with seasonal low levels and each September...
Geology of the middle Tertiary formations of Puerto Rico
Watson Hiner Monroe
1980, Professional Paper 953
Rocks of Oligocene and Miocene age crop out in both N and S Puerto Rico. They rest with angular unconformity on volcanic and related sedimentary and intrusive rocks that range in age from Early Cretaceous to M. Eocene. The older rocks crop out on the upland that extends E-W through...