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5409 images found

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Potomac River. Virginia (L)- Maryland (R) (Vertical)

Great Falls of the Potomac River. Virginia (L)- Maryland (R) at Great Falls Park. Bedrock is metagraywacke and schist of the Proterozoic-Cambrian Mather Gorge Formation. (220909-67)

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Great Falls of the Potomac River. (vertical)

Great Falls of the Potomac River. Virginia (L)- Maryland (R) at Great Falls Park. Bedrock is mostly metagraywacke of the Proterozoic-Cambrian Mather Gorge Formation. (220909-62)

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Great Falls of the Potomac River. Virginia (L)- Maryland (R)

Great Falls of the Potomac River. Virginia (L)- Maryland (R) at Great Falls Park. Bedrock is mostly metagraywacke and schist of the Proterozoic-Cambrian Mather Gorge Formation. (220909-57)

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Ordovician Perry Hall Gneiss, Baltimore, Maryland

Ordovician Perry Hall Gneiss, a felsic part of the Baltimore Mafic Complex, Maryland (220909-56)

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Salem River Estuary, New Jersey (Pan)

Panorama of the Salem River Estuary, New Jersey (220909-52)

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Salem River Estuary, New Jersey (Vertical)

Grasses along the Salem River Estuary, New Jersey (220909-48)

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Salem River Estuary, New Jersey (Vertical)

Grasses along the Salem River Estuary, New Jersey (220909-47)

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Salem River Estuary, New Jersey (Vertical)

Wetlands of the Salem River Estuary, New Jersey (220909-45)

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Folded pelitic schist, Delaware

Folded foliation in Proterozoic-Cambrian pelitic schist of the Wissahickon Formation, Delaware (220909-42)

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Folded pelitic schist, Delaware (vertical)

Folded foliation in Proterozoic-Cambrian pelitic schist of the Wissahickon Formation, Delaware (220909-35)

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Banded gneiss, Delaware

Near-vertical foliation in Pelitic gneiss of the Proterozoic-Cambrian Wissahickon Formation, Delaware. (220909-25)

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Groundwater seeping from cracks in gneiss, DE (vertical)

Groundwater seeping from cracks in Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware. Note the inclined foliation (220909-20)

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Brandywine Blue Gneiss, Delaware (vertical)

Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware (220909-15)

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Brandywine Blue Gneiss, Delaware (vertical)

Close-up of foliation in Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware (220909-6)

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Brandywine Blue Gneiss, Delaware (vertical)

Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware (220909-1)

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Syncline at Sideling Hill, Maryland

Mississippian clastic rocks of the Rockwell and overlying Purslane Formations, folded into a near-upright syncline at the Sideling Hill roadcut on I-68 in Maryland (220908-112)

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Syncline at Sideling Hill, Maryland

Mississippian clastic rocks of the Rockwell and overlying Purslane Formations, folded into a near-upright syncline at the Sideling Hill roadcut on I-68 in Maryland (220908-110)

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