Figure F140. Folds related to the flow of lava. A. Microfold with vertical axial plane (Thin Section 1; Sample 309-1256D-75R-1 [Piece 8, 46–52 cm]) (field of view [FOV] = 10 mm; plane-polarized light, blue filter). B. Folded plagiocase layer (Thin Section 33; Sample 309-1256D-89R-1 [Piece 13, 64–67 cm]) (FOV = 1.25 mm; plane-polarized light, blue filter).
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