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A rounded cobble collected from a beach near Brora, Scotland contains angular, brecciated sandstone clasts cemented together by crude oil. No oil occurs within the tight, dolomite-cemented clasts, except along fractures. Provenance of the cobble is uncertain, however, the lithology and shape of the clasts suggests that they are fault gouge breccia composed of Old Red Sandstone from the nearby Helmsdale...
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