Tests of Rock Cores, Pease Study Area, New Hampshire.
Abstract
Laboratory tests were conducted on rock core samples received from six core holes in the Pease study area of Belknap, Cheshire, Grafton, and Merrimack Counties in New Hampshire. Results were used to determine the quality and uniformity of the rock to depths of 200 feet below ground surface. The rock core was petrographically identified as predominately mica gneiss, mica schist, dacite, granite gneiss, and muscovite granodiorite, with relatively minor quantities of tonalite, granodiorite gneiss, and basaltic material. Evaluation of the Pease study area core on a hole-to-hole basis indicates the moderately fractured and intact dacite removed from Hole PZ-CR-36 to be very competent rock. The Highly fractured core, removed at depths of 40 feet or less below ground surface, was marginal in quality. Generally, this hole yielded material representative of competent, hard rock media. The remainder of the holes from this area, i.e., PZ-CR-2, -11, -23, -25, and -34, generally yielded rock core exhibiting physical properties characteristic of marginal to barely competent material. The above evaluations and conclusions have been based on somewhat limited data; therefore, more extensive investigation will be required in order to accurately assess the individual areas under consideration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1970
- Accession Number
- ADA035374
Entities
People
- Robert W. Crisp