pumicite


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pumicite

[′pəm·ə‚sīt]
(geology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

pumicite

Naturally occurring, finely divided pumice.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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in this case there is considerable demand for the building material which is scarce and critical in Alaska, and as it happens the removal of the pumicite will not permanently mar the scenic qualities because the pumicite is readily available on the beach, can be taken on a barge, and the rains, snow, ice, and other weathering obliterates almost overnight the effect of the removal.
53 (authorizing "the removal of deposits of siliceous volcanic ash, commonly known as pumicite, from such areas as [the Secretary of Interior] may designate along the shores of Selikof Strait in Katmai National Monument, Alaska").