Figure F9. A. Close-up photograph of the volcanic glass-rich sand layers associated with Horizon A in lithostratigraphic Subunit IIIA (interval 204-1248C-14H-3, 112-118 cm). B. Photomicrograph of the volcanic ash layer (Sample 204-1248C-14H-3, 116 cm).

Figure F9. A. Close-up photograph of the volcanic glass-rich sand layers associated with Horizon A in lithostratigraphic Subunit IIIA (interval 204-1248C-14H-3, 112-118 cm). B. Photomicrograph of the volcanic ash layer (Sample 204-1248C-14H-3, 116 cm).