Coastal & Estuarine Geology Program Navigation buttonsGeologic Maps of Maryland
Carroll County (1968)

Caution: These images were scanned from a paper copy of the out-of-print and outdated 1968 Geologic Map of Maryland. Due to the age of this map, these images do not necessarily represent an accurate interpretation of currently accepted geologic theory. Because the projection of the original map was distorted during reproduction, and the paper medium is not stable, these images do not meet any cartographic standards. Therefore geographic or Cartesian coordinates cannot be applied to these images, and georeferencing is not possible.

These images are for illustration purposes only. Do not use these documents for GIS, navigation, legal purposes, surveying, or anything else other than document illustrations. They were created only to illustrate our publications and are not accurate enough to be used for any other purposes. You may use them as illustrations only, and you must give proper credit to Maryland Geological Survey when using these maps.

A newer topographic map (1990) of Carroll County is available through our List of Publications.

     Click on a tile to display information about the associated rock types or formations.
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Carroll County Geologic Map (1968)
Wissahickon Formation (Late Precambrian ?) Sams Creek Metabasalt (Late Precambrian ?)
Upper Pelitic Schist  (Late Precambrian ?) Wakefield Marble (Late Precambrian ?)
Metagraywacke (Late Precambrian ?) Silver Run Limestone (Late Precambrian ?)
Metaconglomerate  (Late Precambrian ?) Ijamville Formation (Late Precambrian ?)
Boulder Gneiss (Late Precambrian ?) Marburg Schist (Late Precambrian ?)
Lower Pelitic Schist  (Late Precambrian ?) Ijamville Formation / Marburg Schist (Late Precambrian ?)
Cockeysville Marble (Late Precambrian ?) Antietam Formation (Cambrian)
Setters Formation (Late Precambrian ?) Harpers Formation  (Cambrian)
Ultramafic Rocks (Early Paleozoic- Late Precambrian ?) Diabase Sills and Dikes (Triassic)
Baltimore Gabbro Complex  (Early Paleozoic- Late Precambrian ?) Gettysburg Shale (Triassic)
Baltimore Gneiss  (Precambrian) New Oxford Formation (Triassic)
Libertytown Metarhyolite (Late Precambrian ?) Pegmatite Dikes (Paleozoic)

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Updated 4/10/08

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