Figure F14. Photographs and sketch of cataclastic zone from Subunit 4A composed of subangular pieces of fine-grained host rock fractured in situ (interval 327-U1362A-9R-2 [Piece 10, 74–82 cm]). A. External view of full cataclastic zone and associated halo on whole-round piece. B. Cut section through cataclastic zone. C. Sketch illustrating orientation of subangular breccia fragments and distribution of alteration halos.
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