Tuesday, March 31, 2026
Appalachian Trail - type II fun
Shenandoah National Park
Excellent examples of columnar jointing are found in Shenandoah National Park in Precambrian (approximately 570 million year old) greenstones. Greenstones are lightly metamorphosed basalt. These lavas were erupted from rift zones formed during the breakup of the Rodinia supercontinent.
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I've been having some discomfort in the joints of my big toes when I'm hiking and especially after I'm done. To combat the issue...











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