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Geology of the Bir Nifazi Quadrangle, Kingdom of Saudi Arabia
James E. Quick, Paul S. Bosch
1990, Open-File Report 90-301
The Bi'r Nifazi quadrangle is located in the north-central part of the Precambrian shield of Saudi Arabia between lat 24° 45' and 25° 00' N. and long 41° 15' and 41° 30' E. Approximately 75 percent of the area is underlain by large plutons that range in composition from gabbro...
Tectonic history of the northern Nabitah fault zone, Arabian Shield, Kingdom of Saudi Arabia
J. E. Quick, Paul S. Bosch
1990, Open-File Report 90-316
Geologic mapping combined with structural, petrographic, and geochemical investigations were used to evaluate the motion and paleogeographic setting of the northern Nabitah fault zone. The orientation and asymmetry of small structures in three areas along the fault zone suggest that motion was primarily left-lateral strike slip. East of the fault...
Large springs in the Valley and Ridge physiographic province of Pennsylvania
D. A. Saad, D. J. Hippe
1990, Open-File Report 90-164
In the Valley and Ridge physiographic province of Pennsylvania, 137 springs have a single or median discharge value equal to or greater than 100 gallons per minute. Information for these large springs has been tabulated to summarize the data useful to the U.S. Geological Survey's Appalachian Valleys--Piedmont Regional Aquifer-System Analysis...