Romeroville Sandstone facts for kids

Quick facts for kids Romeroville Sandstone Stratigraphic range: Cenomanian
Romeroville Sandstone beds resting on Pajarito Formation, I-25 road cut, Romeroville, New Mexico, USA
Type	Formation
Unit of	Dakota Group
Underlies	Graneros Shale
Overlies	Pajarito Formation
Thickness	up to 9 m (30 ft)
Lithology
Primary	Sandstone
Other	Siltstone
Location
Coordinates	35°31′33″N 105°14′17″W / 35.5258°N 105.2380°W / 35.5258; -105.2380
Region	New Mexico
Country	United States
Type section
Named for	Settlement of Romeroville, New Mexico
Named by	Kues and Lucas
Year defined	1987

The Romeroville Sandstone is a geologic formation in northeastern New Mexico. It likely was deposited in the Cenomanian Age of the Cretaceous Period.

Description

The formation consists of yellow-gray quartz sandstone with minor siltstone. The sandstone is planar crossbedded and bioturbated and locally pebbly. It overlies the Pajarito Formation and is in turn overlain by the Graneros Shale. Maximum thickness is 9 meters (30 ft).

The formation is interpreted as the onset of a marine transgression of the Greenhorn cycle.

History of investigation

The formation was first named by Kues and Lucas in 1987 for previously undivided Dakota Group beds at the Romeroville Gap. Kues and Lucas also identified it at Clayton Lake and in the valley of the Dry Cimarron.