Outcrop or artificial surface exposure, Gneiss
| Geographic location |
-82.095556, 36.109167
82°
5'
44"
W,
36°
6'
33"
N
Carter county,
TN
White Rocks Mountain
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
ROAN MOUNTAIN (NOT A TOWN--COMPILER), 1.3 MILES NORTH OF TENN.-N.C. LINE ON ROUTE 143
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Gneiss |
| Description | CRANBERRY GNEISS, A MEDIUM-TO FINE-GRAINED GNEISS COMPOSED OF QUARTZ, PLAGIOCLASE, BIOTITE, GARNET, AND ACCESSORY ALLANITE AND EPIDOTE |
| Laboratories | Lamont (Columbia University) |
| Compiler name | Godoy, M.M. |
| Date compiled | 1979 03 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Location comment | ROAN MOUNTAIN (NOT A TOWN--COMPILER), 1.3 MILES NORTH OF TENN.-N.C. LINE ON ROUTE 143 |
| Bibliographic reference | Long, L.E., Kulp, L.J., and Eckelmann, F.D., 1959, Chronology of major metamorphic events in the southeastern United States: American Journal of Science, v. 257, p. 585-603 |
| (click for info) | |
| Geologic map unit | -82.095556, 36.109167 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 363.38 ± 13Ma initial age disturbed by later metamorphism
|
|---|---|
| Type of analysis | conventional K-Ar |
| Rock or mineral analyzed | biotite |
| Analytical details | |
| Lab sample ID | L-146B |
| Decay constants | 4.72E-04, 0.583E-04* |
| K2O concentration | 9.54 % |
| Radiogenic 40Ar concentration | 55.29 |
| Radiogenic Ar | 94 % |