Port Deposit Gneiss
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." It intrudes into the Volcanic Complex of Cecil County.
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Port Deposit Gneiss
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." It intrudes into the Volcanic Complex of Cecil County.
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The Port Deposit Gneiss is a P ...... canic Complex of Cecil County.
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49,980,657
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983,403,827
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caption
Polished slab of the Port Deposit Gneiss, about 10.7 cm wide
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extent
eastern Maryland
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name
Port Deposit Gneiss
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namedfor
period
Paleozoic
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prilithology
region
Piedmont of Maryland
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type
metamorphic
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The Port Deposit Gneiss is a P ...... canic Complex of Cecil County.
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label
Port Deposit Gneiss
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