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New Oxford Formation
The New Oxford Formation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales.
The New Oxford Formation was first described in Adams County, Pennsylvania in 1929,〔 and over the following decade was mapped in adjacent York County, Pennsylvania〔Stose, G.W., and Jonas, A.I., 1939, Geology and mineral resources of York County, Pennsylvania: Pennsylvania Geological Survey County Report, 4th series, no. 67, 199 p.〕 and Frederick County, Maryland.〔Jonas, A.I., and Stose, G.W., 1938, Geologic map of Frederick County and adjacent parts of Washington and Carroll Counties (Maryland): Maryland Geological Survey County Geologic Map, 1 sheet, scale 1:62,500〕 It was described as "red shale and sandstone with beds of micaceous sandstone, arkose, and conglomerate." The majority of this early mapping was done by G. W. Stose, A. I. Jonas, and Florence Bascom.
==Depositional Environment==
The New Oxford Formation and other formations of the Newark Supergroup were deposited in the Gettysburg Basin, just one of many Triassic rift basins existing on the east coast of North and South America, which formed as plate tectonics pulled apart Pangaea into the continents we see today.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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