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Scientist examines volcanic deposits formed by explosive eruptions...

1991 (approx.)

Detailed Description

These layers of tephra were exposed in a trench dug in Pumice Valley, located about 3 km (1.8 mi) south-southwest from the South Deadman flow. From bottom to top the layers record explosive eruptions from the Deadman and Glass Creek vents and the Inyo Craters.


Public Domain.

unknown USGS source