Outcrop or artificial surface exposure, Gneiss
Geographic location |
-81.972222, 36.138889
81°
58'
20"
W,
36°
8'
20"
N
Avery county,
NC
Elk Park
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
NORTH CAROLINA COORDINATES: 882900N, 1122300E; CRANBERRY MINE AREA
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Source of sample | Outcrop or artificial surface exposure |
Rock name | Gneiss |
Description | USUALLY HIGHLY-DEFORMED, COARSE-GRAINED GNEISS (FELDSPAR, QUARTZ, BIOTITE, SPHENE) WITH LAYERS OF FINER-GRAINED, MORE MAFIC MATERIAL; CRANBERRY GNEISS |
Laboratories | University of North Carolina |
Compiler name | Marvin, R.F. |
Date compiled | 1984 08 |
Precision of location | Accurate to within 1 minute (~1 mile) |
Location comment | NORTH CAROLINA COORDINATES: 882900N, 1122300E; CRANBERRY MINE AREA |
Bibliographic reference | Fullager, P.D., and Bartholomew, M.J., 1983, Rubidium-Strontium Ages Of The Watauga River, Cranberry, and Crossing Knob Gneisses, Northwestern North Carolina ""In"" Lewis, S.E., ed., Geological Investigations In The Blue Ridge Of Northwestern North Carolina: 1983 Guidebook For The Carolina Geological Society, North Carolina Division Of Land Resources, Article 2, 29p In Lewis, S.E., Ed., Geological Investigations In The Blue Ridge Of Northwestern North Carolina: 1983 Guidebook For The Carolina Geological Society, North Carolina Division Of Land Resources, Article 2, 29p. |
(click for info) | |
Geologic map unit | -81.972222, 36.138889 |
Nearby scientific data | Find additional scientific data near this location |
Age estimate | (no age estimate specified) |
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Rock or mineral analyzed | whole rock |
Analytical details | |
Lab sample ID | 1968 |
Decay constants | 1.42E-05 |
Rubidium concentration | 20.64 ppm |
Strontium concentration | 160.6 ppm |
Ratio 87Rb/86Sr | 0.372 |
Ratio 87Sr/86Sr | 0.70929 |
Normal? | T |