Yantarni 410000 yBP
Start: 410000 yBP ± 90000 Years [1]
Event Type: Effusive
- Lava flow [1]
Description: From Riehle and others (1987): "Another sample of a lava flow stratigraphically high in the cone-building deposits yielded an age of 0.41k[+/-]0.09 Ma (sample 19, table 3 [in original text]). The cone retains the outline of its original form (see frontispiece [in original text]) but is incised in all quadrants by glacially eroded valleys, and we infer that cone construction was largely completed before late Pleistocene glaciation. The inference is consistent with the youngest radiometric age of the sample that is stratigraphically high in the cone-building unit (0.41 Ma; sample 19)."
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 