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Tuff

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A pyroclastic rock where the average size of more than 75% of the pyroclastic fragments is less than 64mm and less than 25% of the fragments are lapilli. A general term for all consolidated pyroclastic rocks. Not to be confused with tufa. Adj: tuffaceous.




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Classification of TuffHide

64mm)' b='Lapilli (64-2mm)' c='Ash (<2mm)' actions='fill #cccccc 100,0,0 to 75,25,0 to 75,0,25;fill #cccccc 75,25,0 to 75,0,25 to 25,0,75 to 25,75,0;fill #cccccc 0,100,0 to 25,75,0 to 0,75,25;fill #ffcc00 0,0,100 to 25,0,75 to 0,25,75;fill #cccccc 25,0,75 to 0,25,75 to 0,75,25 to 25,75,0;text dark 12 70,18 pyroclastic breccia;text dark 12 70,21.5 agglomerate;line dark 69,19 to 87.5,6.25,6.25;text dark 13 42,28,28 tuff breccia;text dark 13 12,44,44 lapilli tuff;text dark 12 2,70 lapillistone;text dark 12 85,70 tuff/ash tuff;line dark 6.25,87.5,6.25 to 9,71;line dark 6.25,6.25,87.5 to 92,71;'>Classification of polymodal pyroclastic rocks (after Fisher, 1966)

Sub-divisions of TuffHide

Synonyms of TuffHide

References for TuffHide

Reference List:
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Duff, M. C., M. Newville, D. B. Hunter, P. M. Bertsch, S. R. Sutton, I. R. Triay, D. T. Vaniman, P. Eng, M. L. Rivers (1999) Micro-xas studies with sorbed plutonium on tuff. – J. Synchrotron Rad., 6 (3), 350-352.

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