Figure F298. Uppermost contact between the sheeted dike complex and the Gabbro 1 unit, Gabbro 1 and the dike screen, and the occurrence of xenoliths of the sheeted dike complex in gabbros. A. Sheeted dike/gabbro contact (Section 312-1256D-213R-1 [Pieces 12 and 13, 44–61 cm]). B. Contact showing alteration zone developed in fine-grained basalt (Section 312-1256D-213R-1 [Piece 13, 53–61 cm]). C. Grain size in gabbros decreases away from the contact (Thin Section 59; Sample 312-1256D-213R-1 [Piece 13, 51–54 cm]). D. Contact in A (cross-polarized light; field of view [FOV] = 2 mm). E. Recrystallized and altered pseudocataclasite in A (plane-polarized light; FOV = 2.25 mm). F. Interstitial material of E consists mainly of aggregation of chlorite crystals in A (cross-polarized light; FOV = 1.13 mm). (Continued on next two pages.)
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