hyaloclastite

GLOSSARY OF VOLCANIC TERMS
A deposit comprising small, angular glass fragments formed by nonexplosive shattering of lava or magma flowing into water, ice, or water-saturated sediment (Batiza and White, 2000, p. 361: Schmidt and Schmincke, 2000, p. 383).

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • Hyaloclastite — is a hydrated tuff like breccia rich in black volcanic glass, formed during volcanic eruptions under water or under ice. It has the appearance of angular flat fragments sized between a millimeter to few centimeters. The fragmentation occurs by… …   Wikipedia

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  • Brown Bluff — is a tuya located at the northern tip of the Antarctic Peninsula, Antarctica. It formed in the past 1 million years, which erupted subglacially within an englacial lake. The volcano s original diameter is thought to have been about 12 15… …   Wikipedia

  • Obsidian — For other uses, see Obsidian (disambiguation). Obsidian Obsidian from Lake Cou …   Wikipedia

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