| Basis for focus area |
Mapped extent of Catoctin metavolcanic rocks in Maryland. Pillow structures reported within correlative units in Virginia (for example, see Espenshade (1986); Spencer, Bowring, and Bell (1989); Kline and others (1990)), although no evidence for submarine deposition in Maryland. |
| Identified resources |
Unknown. |
| Production |
Unknown. |
| Status |
Unknown. |
| Estimated resources |
Unknown. |
| Geologic maps |
Horton and others (2017), scale 1:500,000; Fauth (1977), scale 1:24,000; Brezinski (2004a, b, c, 2009), scale 1:24,000; Brezinski and Fauth (2005, 2009), scale 1:24,000; Southworth and others (2002), scale 1:100,000. |
| Geophysical data |
Inadequate Rank 3 to 4 aeromagnetic and Rank 4 aeroradiometric coverage. |
| Favorable rocks and structures |
Thick-bedded metabasalt; interbedded tuffaceous phyllite, amygdaloidal meta-andesite of the Catoctin Formation. |
| Deposits |
None. |
| Evidence from mineral occurrences |
Potential from mineral system/deposit type. |
| Geochemical evidence |
Favorable rock types. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Volcanogenic seafloor deposits known in correlative units in Virginia. |
| Cover thickness and description |
Variable cover and saprolite, some urban areas. |
| Authors |
William Junkin, Rebecca Kavage Adams, David K. Brezinski. |
| New data needs |
Geophysical data, geologic mapping, and geochemical analyses; lidar. |
| Geologic mapping and modeling needs |
Some 1:24,000 scale mapping exists, but incomplete. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar inadequate. |
