Figure F16. Close-up photograph showing unaltered glassy margins of three adjoining lobes and glass fragments between lobes, which are enclosed in a calcite matrix (Unit 20; interval 197-1203A-44R-1, 46-65 cm).

Figure F16. Close-up photograph showing unaltered glassy margins of three adjoining lobes and glass fragments between lobes, which are enclosed in a calcite matrix (Unit 20; interval 197-1203A-44R-1, 46-65 cm).