Setters Formation
The Setters Formation is a geological formation in Maryland, Pennsylvania, and Delaware. The formation is metamorphic and consists of a complex suite of schist, gneiss, and quartzite.[1]
Closeup of an example of the Setters Formation showing schist with tourmaline or hornblende crystals on the foliation plane. Width is about 0.5 m.
| Setters Formation | |
|---|---|
| Stratigraphic range: late Precambrian | |
 Outcrop of Setters Formation along Marriottsville Road, Baltimore County | |
| Type | metamorphic |
| Unit of | Glenarm Group |
| Underlies | Cockeysville Marble |
| Overlies | Baltimore Gneiss |
| Lithology | |
| Primary | Mica-schist |
| Other | Muscovite-gneiss and quartzite |
| Location | |
| Region | Piedmont of eastern North America |
| Country |  United States |
| Extent | Maryland, Pennsylvania, Delaware |
References
- Crowley, William P.; Cleaves, Emery T. (1974). Geologic map of the Towson Quadrangle, Maryland (Map). 1:24000. Maryland Geological Survey.
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