Tests of Rock Cores, Plattsburgh Study Area, New York.
Abstract
Laboratory tests were conducted on representative rock core specimens received from six core holes located in Clinton, Essex, Franklin, and Warren Counties near Plattsburgh Air Force Base, New York. The results of these tests were used to gage the quality and uniformity of the rock to depths of 200 feet below ground surface. The core was petrographically identified as predominately quartz sandstone and granite gneiss with relatively small amounts of amphibolite and mica schist. Schmidt hardness, specific gravities, compressional wave velocities, and ultimate uniaxial compressive strengths varied considerably throughout the area, depending primarily on rock type, bedding, and nature and degree of fracturing and/or banding present, if any. A hole-to-hole evaluation of the area, based on physical properties exhibited, indicates that the sandstone yielded by Holes P-CR-64 and P-CR-72 was generally competent rock, provided anisotropy is not a disqualifying quality. The granite gneisses tested from Holes P-CR-22 and P-CR-81 would also, in spite of the presence of some material of marginal quality, appear to be relatively competent rock. The gneiss received from Holes P-CR-8 and P-CR-46 contained significant amounts of incompetent material. More extensive investigations will be required in order to accurately assess the areas under consideration. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1970
- Accession Number
- ADA035372
Entities
People
- Robert W. Crisp