A selection of cobbles at the beaches around Dunbar: Old Red Sandstone is the most common lithology.
Primary sedimentary structures are visible. Interpret the environment of deposition. Interpret the geologic history subsequent to deposition.
with pebbles and cross-beds.
Flip side of the sample here: www.gigapan.com/gigapans/188209
Table Mountain Sandstone from Table Mountain. A quartz arenite with variable levels of hematite staining.
Exact provenance unknown
Silurian quartz arenite with nice cross-bedding.
44 31 59 N 107 58 15 W - 360*
44 36 8 N 108 8 27 W - Facing West
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