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Contour map of the bedrock surface, Ludlow Quadrangle, Massachusetts
Clark J. Londquist
1973, Miscellaneous Field Studies Map 503-A
Contours show the altitude of the bedrock surface.  The position of the contours is based largely on data from wells and test holes supplemented by knowledge of the geologic history of the region.The map show the configuration of the bedrock surface if all unconsolidated earth materials were removed....
Erosional and Depositional Aspects of Hurricane Camille in Virginia, 1969
Garnett P. Williams, Harold P. Guy
1973, Professional Paper 804
Probably the worst natural disaster in central Virginia's recorded history was the flood resuiting from an 8-hour deluge of about 28 inches (710 mm) of rain on the night of August 19-20, 1969. This study examines some of the intensive sediment erosion and deposition that resulted from the storm and...
Ground-water hydrology of northern Napa Valley, California
Robert E. Faye
1973, Water-Resources Investigations Report 73-13
The alluvium of northern Napa Valley is the principal aquifer of the area and is capable of yielding as much as 3,000 gallons per minute to wells. Generally the larger-yielding wells are along the Napa River where the alluvium is thickest and most permeable. Recharge to the alluvium is chiefly...