Surface of quarried block in the Catoctin Formation. Hammer is ~35 cm long.
This is going to be trouble…
Annotated view. g- greenstone (actinolite schist), m- marble, v- vein composed of carbonate minerals.
Boudins or Pillows?
August 14, 2016 by ·
A Resource for Information on the Commonwealth's Geology
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Cliffs of Westmoreland
The Cliffs of Westmoreland rise 30 to 45 meters (~100 to 150′) above the waters of the Potomac River. These bluffs expose Miocene to Pliocene sedimentary units, some which are quite fossiliferous. For more information on the geology of Westmoreland checkout the 2005 Virginia Geological Field Conference guidebook by Buck Ward and others. Note the […]
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At the Pluton’s Edge
When large quantities of magma intrude and solidify in the Earth’s crust they form bodies of intrusive igneous rock known as plutons. The featured image nicely illustrates the edge (geologic contact) of a granitic pluton in the Blue Ridge Mountains of central Virginia. The granite is part of the 706 ± 4 million year old […]