Figure F61. Close-up photograph of glassy margin of thin sheet flow (Unit 1256D-2) (interval 206-1256D-13R-3, 25-33 cm). Note the horizontal, planar shape to glassy margin and parallel vesicle horizon just below the margin.

Figure F61. Close-up photograph of glassy margin of thin sheet flow (Unit 1256D-2) (interval 206-1256D-13R-3, 25-33 cm). Note the horizontal, planar shape to glassy margin and parallel vesicle horizon just below the margin.