1995-03-17_GENERAL DOCUMENTS - M1973021

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J RALEY&ALDRICH BORING NO. CH-CR4 PAGE4 OF 5 INCORPORATED CORE BORING REPORT PREPARED BY:A.L.HOWARD/P.GANSE Depth Drill Core Recovery in Rate No. ROD FIELD CLASSIFICAT16NANDREMARKS Feet Min Per 1SepfF Ft. % Foot Range 7 NOTE: Dark gray diorite gneiss layer from 70.0 to 71.7 ft ------------------------- 7 71.7 Very hard to hard,fresh to slightly weathered, light gray and pinkish-gray,fine- grained GRANITE GNEISS;very close to close,rough,planar joints dipping 30-400 7 parallel to foliation, iron staining on joint surfaces, some steeply dipping, almost 4.7 100 1.8' vertical joints 7 C16 (380/6) -Dark gray to dark greenish gray diorite gneiss layer from 73.0 to 73.7 ft 7 75 7 7 76.4 Same as above 3.9 C17 4.8 100 (62%) -Dark greenish gray and pink diorite gneiss layer from 79.5 ft to 81.7 ft 80 81.2 81.2 Same as above except quartz and potassium feldspar rich zones at approximately 83 C17 4.9 100 3.3' ft, some chlorite on joint surfaces (67%) 85 86.1 86.1 Same as above except reddish brown and gray C18 4.7 100 0.8' NOTE: Quartz and feldspar rich from approximately 83 to 88 ft (17%) 90 90.8 90.8 Very hard to hard fresh to slightly weathered,gray,fine grained GRANITE GNEISS; very close to close,rough planar joints dipping 40°, steep,nearly vertical joints; iron C19 4.8 100 1.4' staining on joint surfaces;healed joints oriented nearly horizontal to 45°,filled with (29'/0) quartz 95 95.6 FIELD HARDNESS BEDDING DISCONTINUITIES WEATHERING V.HARD-KNIFE CANT SCRATCH V. THIN < 2" V.CLOSE < 2" FRESH MODSEVERE HARD-SCRATCHES DIFFICULT THIN 2" - 12" CLOSE 2" - 12" V.SLIGHT SEVERE MOD.HARD-SCRATCHES EASILY MEDIUM 12" - 36" MOD.CLOSE 12" - 36" SLIGHT V.SEVERE SOFT-GROOVES THICK 36" - 120" WIDE 36" - 120" MODERATE COMPLETE V.SOFT-CARVES V.THICK > 120" V.WIDE > 120" BORINGNO. CH�CR4