| New Oxford Formation | |
|---|---|
| Stratigraphic range: Late Triassic, ~ | |
 Conglomerate of the New Oxford Formation from York County, Pennsylvania | |
| Type | sedimentary |
| Unit of | Newark Supergroup |
| Underlies | Gettysburg Formation |
| Thickness | 6900 feet[1] |
| Lithology | |
| Primary | shale, sandstone |
| Other | conglomerate |
| Location | |
| Extent | Pennsylvania, Maryland |
| Type section | |
| Named by | Stose and Bascom, 1929[1] |
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,[1] and over the following decade was mapped in adjacent York County, Pennsylvania[2] and Frederick County, Maryland.[3] 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 George Willis Stose, Anna Isabel Jonas, and Florence Bascom.
- ^ a b c Stose, G.W., and Bascom, Florence, 1929, Description of the Fairfield and Gettysburg quadrangles [Pennsylvania]: U.S. Geological Survey Geologic Atlas of the United States, Fairfield-Gettysburg folio, no. 225, 22 p.
- ^ 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.
- ^ 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