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Collecting, preparing, crossdating, and measuring tree increment cores
R.L. Phipps
1985, Water-Resources Investigations Report 85-4148
Techniques for collecting and handling increment tree cores are described. Procedures include those for cleaning and caring for increment borers, extracting the sample from a tree, core surfacing, crossdating, and measuring. (USGS)...
Aquifer tests in west-central Florida, 1952-76
R. M. Wolansky, M. A. Corral
1985, Water-Resources Investigations Report 84-4044
The ground-water system in west-central Florida is composed of, in descending order, the surficial (usually unconfined) aquifer, intermediate aquifer and confining beds, Floridan aquifer, and lower confining bed. Aquifer test data were analyzed to determine transmissivity, storage coefficient, leakance, and vertical hydraulic conductivity of the aquifers and confining beds. Transmissivities...
The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek blockage in the Mount St. Helens area, Washington
William Meyer, M. A. Sabol, H. X. Glicken, Barry Voight
1985, Professional Paper 1345
A slope stability analysis on the South Fork Castle Creek debris avalanche blockage, near Mount St. Helens, Washington, was conducted to determine the likelihood of mass failure of the blockage and resultant breakout of South Fork Castle Creek Lake. On the basis of material properties, groundwater levels, and seismic history...
Tectonic implications of the Indian Run Formation— A newly recognized sedimentary mélange in the northern Virginia Piedmont
Avery Ala Drake
1985, Professional Paper 1324
Sedimentary melange in the northeastern part of Fairfax County, Virginia, contains both mesoscopic and mappable fragments of Accotink Schist, Lake Barcroft Metasandstone, metagabbro, and ultramafic rocks as well as smaller fragments of other rock types. This melange was originally mapped as the Sykesville Formation, a major precursory sedimentary melange in...