Figure F11. Photomicrographs of a vein formed of aggregates of small calcite grains (thin section TS 71–78, open nicols). A, B. Details of right and left rectangles in Figure F10, respectively. C. Sigmoidal shape of calcite grain aggregates (detail of A). D. Vein cut by conjugated normal microfaults (detail of B). White arrow = movement along microfaults, black arrow = direction of core top.
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