pahoehoe blister

USGS PHOTO GLOSSARY OF VOLCANIC TERMS
Blisters are thin-walled basaltic-glass bubbles formed by the release of volcanic gas from the surface of a pahoehoe flow. Like a glass blower that blows air into molten glass to create a goblet or vase, gas released from lava may force the thin glassy crust of a lava flow to form a large bubble or blister. They are found on all types of pahoehoe flows.
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Photograph by J.D. Griggs on 21 August 1990
Blister on the surface of a pahoehoe flow, Kilauea Volcano, Hawai`i. Note U.S. quarter for scale.
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Other pahoehoe textures

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

Look at other dictionaries:

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  • cave — cavelike, adj. /kayv/, n., v., caved, caving. n. 1. a hollow in the earth, esp. one opening more or less horizontally into a hill, mountain, etc. 2. a storage cellar, esp. for wine. 3. Eng. Hist. a secession, or a group of seceders, from a… …   Universalium

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