Setters Formation
Setters Formation Stratigraphic range: late Precambrian | |
---|---|
![]() Outcrop of Setters Formation along Marriottsville Road, Baltimore County | |
Type | metamorphic |
Unit of | |
Underlies | Cockeysville Marble |
Overlies | Baltimore Gneiss |
Lithology | |
Primary | Mica-schist |
Other | Muscovite-gneiss and quartzite |
Location | |
Region | Piedmont of eastern North America |
Country | ![]() |
Extent | Maryland, Pennsylvania, Delaware |
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]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Setters_Formation_McKeldin_Area_Patapso_Valley_State_Park_20211231.jpg/240px-Setters_Formation_McKeldin_Area_Patapso_Valley_State_Park_20211231.jpg)
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.
References[]
- ^ Crowley, William P.; Cleaves, Emery T. (1974). Geologic map of the Towson Quadrangle, Maryland (Map). 1:24000. Maryland Geological Survey.
Categories:
- Geology of Maryland
- Maryland stubs