The Neoproterozoic Lynchburg Group is a thick sequence of metasedimentary rocks exposed in the eastern Blue Ridge from northern to south-central Virginia. These deposits range from coarse-grained conglomerate to fine-grained mudstone.
A Resource for Information on the Commonwealth's Geology
The Neoproterozoic Lynchburg Group is a thick sequence of metasedimentary rocks exposed in the eastern Blue Ridge from northern to south-central Virginia. These deposits range from coarse-grained conglomerate to fine-grained mudstone.
Photomicrograph of fault breccia in the Cambrian Antietam Formation, Blue Ridge province. Breccias form when rocks are extensively fractured in fault zones and are cemented together when minerals precipitate in the cracks and fractures. Note the angular fragments (fr) of quartz sandstone in a matrix of fine-grained iron oxide cement (ic). Field of view 4 […]
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 […]
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