View across the central Barberton Greenstone Belt toward Barite Valley.
Tombolo connecting "Mainland" Shetland to St. Ninian's Isle, Shetland Islands, Scotland.
Looking at the blunt, trailing edge of the North American Plate from the rift valley at Thingvellir, Iceland.
with stylolites and primary sedimentary features
It looks like it's the same thing as the lower unit (below the unconformity) at Siccar Point - a graywacke.
Fossil cone from Wise County, VA.
Lewisian gneiss exposed near Durness, Scotland. Oldest rock in the North West Highlands.
Archean "crinklies" viewed in cross-section, coating a cross-bedded channel sandstone.
Sandstone at the top of the Graafwater Formation, Cape Supergroup.
Table Mountain Sandstone from Table Mountain. A quartz arenite with variable levels of hematite staining.
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