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From Wikipedia, the free encyclopedia
The Port Deposit Gneiss is a Paleozoic gneiss formation in Cecil County, Maryland. It is described as a "Moderately to strongly deformed intrusive complex, chiefly composed of quartz diorite gneiss. Rock types include gneissic biotite-quartz diorite, hornblende-biotite-quartz diorite, and biotite granodiorite, with minor amounts of quartz monzonite and hornblende-quartz diorite. Moderate protoclastic foliation grades into strong cataclastic shearing."[1] It intrudes into the Volcanic Complex of Cecil County.
Port Deposit Gneiss | |
---|---|
Stratigraphic range: Paleozoic | |
Type | metamorphic |
Lithology | |
Primary | gneiss |
Location | |
Region | Piedmont of Maryland |
Extent | eastern Maryland |
Type section | |
Named for | Port Deposit, Maryland |
The Port Deposit Gneiss has been quarried along the east as well as the west bank of the Susquehanna River for over 100 years.
Port Deposit Gneiss was used in:[2]
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