Manassas Sandstone

Manassas Sandstone
Stratigraphic range:
Smithsonian Castle in Washington, D.C., built using red Triassic sandstone from Seneca Quarry
TypeGeological formation
Unit ofChatham Group
Sub-unitsReston Member, Rapidan Member, Tuscarora Creek Member, Poolesville Member
UnderliesBull Run Formation
Lithology
PrimarySandstone, shale
Location
Coordinates38°54′N 77°42′W / 38.9°N 77.7°W / 38.9; -77.7
Approximate paleocoordinates13°12′N 22°00′W / 13.2°N 22.0°W / 13.2; -22.0
RegionVirginia, Maryland
CountryUnited States
Type section
Named forManassas, Virginia
Manassas Sandstone (the United States)
Manassas Sandstone (Virginia)

The Manassas Sandstone is a Late Triassic geological unit in Virginia and Maryland, United States. Mostly consisting of coarse sediments such as sandstone and conglomerate, it contains the oldest exposed Triassic rocks in the Culpeper Basin. The Manassas Sandstone is sometimes regarded as its own formation, and other times regarded as a member of the Passaic Formation.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.