West of Quincy, there are big gravel dunes deposited subaqueously by the Glacial Lake Missoula outburst floods.
Tombolo connecting "Mainland" Shetland to St. Ninian's Isle, Shetland Islands, Scotland.
Potential record of "Snowball Earth" glaciations.
Proterozoic dike with biiiiiiiiiiiiiiiiig feldspars (and flow structures, in this case). Want to see the other side of this sample? Try this: gigapan.com/gigapans/187738
Spot the basking grey seals.
Permian-aged volcanic vent complex, preserved as a sea stack at Kinkell Ness, east of St. Andrews, Scotland
Mylonitized Moine schist above, broken up Durness limestone below.
Germany Valley, West Virginia. Ordovician carbonates with fossils.
An outcrop north of Loch Assynt showing the basal Pipe Rock (Cambrian quartz arenite).
Mahantango Formation, Trinity Church site, Fort Valley, Virginia.
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