Outcrop or artificial surface exposure, Vitrophyre
| Geographic location |
-116.711111, 36.295833
116°
42'
40"
W,
36°
17'
45"
N
Inyo county,
CA
Ryan
1:62,500 scale map quadrangle
Accurate to within 1 minute (~1 mile)
SW OF RYAN, EAST SIDE OF BLACK MOUNTAINS
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Vitrophyre |
| Description | GREENWATER VOLCANICS |
| Laboratories | USGS Menlo Park |
| Compiler name | Hansen, J.K. |
| Date compiled | 1985 07 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Location comment | SW OF RYAN, EAST SIDE OF BLACK MOUNTAINS |
| Bibliographic reference | Mcallister, J.K., 1973, Geologic Map and Sections Of The Amargosa Valley Borate Area--Southeast Continuation Of The Furnace Creek Area--Inyo County, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-782. |
| (click for info) | |
| Geologic map unit | -116.711111, 36.295833 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 5.18 ± 0.15Ma age of volcanism
|
|---|---|
| Type of analysis | conventional K-Ar (ANALYTICAL DATA IS FROM UNPUBLISHED SOURCES--COMPILER)
|
| Rock or mineral analyzed | biotite |
| Analytical details | |
| Lab sample ID | 2 (JFM67-4-18D) |
| Decay constants | 4.72E-04, 0.585E-04, 1.19E-04 |
| Radiogenic 40Ar concentration | 0.6432 |
| Radiogenic Ar | 41 % |