Sample courtesy of Ken Rasmussen and his colleague, the Baltimore-based archaeologist Henry Ward.
See if you can find the ammonite fossils in this hornfels ("basalt" according to the Neptunists).
Just keeping track of changes to my land over the years.
Inside a narrow rift along the western margin of the Þingvellir Vallley. North American Plate to the left; Eurasian Plate to the right.
Columnar basalt at a seaside location in County Antrim.
Some basalt showing a well-developed weathering rind and columnar jointing.
Found cropping out along the beach at Barns Ness, east of Dunbar, Scotland.
Ultramafic rocks have experienced faulting at this southernmost spot where geologists are in the Idahoan part of the Pacific Time Zone.
Dike that cross-cuts schist, north side of the beach.
Folded turbidites of the Smaull Greywacke at Saligo Bay, Islay, Scotland.
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