Figure F86. Miarolitic cavity filled with nontronite and celadonite (lining walls), with successive fillings of goethite, calcite, and, possibly, blue chalcedony (center) in Sample 192-1183A-66R-2 (Piece 4B, 60-64 cm) (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1183A

Figure F86. Miarolitic cavity filled with nontronite and celadonite (lining walls), with successive fillings of goethite, calcite, and, possibly, blue chalcedony (center) in Sample 192-1183A-66R-2 (Piece 4B, 60-64 cm) (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1183A_026).