← Search
Sample LS-2
NavDat sample number 4976 · ANDESITE
Sample
| Sample ID | LS-2 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | Samples LS-1 and LS-2 were collected at different localities from a polymict volcanic breccia. Most of the volcanic breccias in this part of the Sierra Nevada have a variety of lithologies in the clasts. Probably the youngest of a group of ages from several clasts at any given locality would be the closest one to the age of eruption due to the possibility of including older material during the eruption or transportation processes. Since only two samples were dated at this locality, the age should be considered a maximum. |
|---|
Location
| Latitude | 38.657 |
|---|
| Longitude | -119.599 |
|---|
| Location | Alpine County |
|---|
| State / province | California |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 15 |
|
14.5 |
15.5 |
|
M.L. Silberman, U.S. Geological Survey |
Analyses
No chemical analyses are stored for this sample.
References
- Morton, Janet L. and Silberman, Miles L. of the U.S. Geological Survey, Menlo Park; Bonham, H.F. and Garside, Larry J. of the Nevada Bureau of Mines and Geology, Reno; and Noble, Donald C. of the Michigan Technological University, Houghton (1977) K-AR AGES OF VOLCANIC ROCKS, PLUTONIC ROCKS, AND ORE DEPOSITS IN NEVADA AND EASTERN CALIFORNIA - DETERMINATIONS RUN UNDER THE USGS-NBMG COOPERATIVE PROGRAM.
