Figure F299. Chilled margins in the sheeted dike complex. A. Banding across chilled margins is a combined effect of the chilled margin texture and alteration (Section 312-1256D-175R-1 [Piece 11, 44–48 cm]). B. Banding across chilled margin is repeated with dark, altered glassy material intruding into the margin (Section 312-1256D-179R-1 [Piece 2, 3–10 cm]). C. Simple chilled margin with banding of baked and spherulitic zone (Thin Section 7; Sample 312-1256D-175R-1, 43–46 cm) (plane-polarized light; field of view [FOV] = 4.5 mm). (Continued on next page.)
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