Sample: 81-ASj-76
Sample ID: | 81-ASj-76 [1] |
Station ID: | 81-ASj-76 |
AT Num: | |
Volcano: | Tanada Peak |
Possible source: | |
Eruption: | |
Collector: | Unknown, Unknown |
Date sampled: | 1981-00-00 |
Sample type 1: | Lava |
Color: | |
Final unit: | |
Text Description: | Wrangell Lava. Source and age mostly unknown. Olivine basalts. Thick (greater than 5 m), medium-gray to medium-dark-gray, sparsely porphyritic flows containing phenocrysts of fresh olivine (trace to 5%, 0.5-2 mm) in an intergranular to intersertal groundmass of plagioclase, olivine, clinopyroxene, and locally glass. * * * Source for northernmost flows is apparently a small eroded shield volcano 2-3 km north in Nabesna C-6 quadrangle. |
Sample Location: |