Yantarni 460000 yBP
Start: 460000 yBP ± 120000 Years [1]
Event Type: Effusive
- Cone [1]
Description: From Riehle and others (1987): "A sample of the basal cone deposits on the north side of the cone yielded a K-Ar age of 0.46k[+/-]0.12 Ma (sample 77, table 3 [in original text]), thus the onset of the cone- building phase of volcanism overlaps or closely succeeds the closing stages of early lava-flow activity."
References Cited
[1] Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska, 1987
Riehle, J. R., Yount, M. E., and Miller, T. P., 1987, Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska: U.S. Geological Survey Bulletin 1761, 27 p., 1 sheet, scale 1:63,360.
full-text PDF 2.2 MB
plate 1 PDF 429 KB Complete Eruption References
Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska, 1987
Riehle, J. R., Yount, M. E., and Miller, T. P., 1987, Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska: U.S. Geological Survey Bulletin 1761, 27 p., 1 sheet, scale 1:63,360.
full-text PDF 2.2 MB
plate 1 PDF 429 KB 