pillow breccia

GLOSSARY OF VOLCANIC TERMS
A mixture of coarse, typically glassy fragments and broken to whole pieces of pillow lava formed from the shattering of pillow lava crusts (Batiza and White, 2000, p. 361). Pillow breccias commonly form in areas where pillow lavas are not strong enough to maintain their competence along steep submarine slopes or scarps.

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

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