Setters Formation
Geological formation in the northeastern U.S.
From Wikipedia, the free encyclopedia
The Setters Formation is a geological formation that is located in Maryland, Pennsylvania, and Delaware in the United States. The formation is metamorphic and consists of a complex suite of schist, gneiss, and quartzite.[1]
| 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 |
It is the lowest unit of the Glenarm Group (or Supergroup).[2] The overlying formations of the group are the Cockeysville Marble and the Wissahickon Formation.
Outcrops
Gallery
Setters Formation showing schist with tourmaline or hornblende crystals on the foliation plane
