Catoctin Formation metavolcanics in Maryland

Region East, Northeast
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

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.