Geology Chester County, SC

Geology Chester County, SC

geologic map at a scale 1:250,000 and depicts my synthesis of the detailed data presented on open file 1:2400 maps

THE GEOLOGY OF CHESTER COUNTY, SC.
The area has a long history of sedimentation, tectonism and erosion.
The earliest Proterozoic host amphibolites, gneiss and quartzites are
cut by metagranites (Great Falls), gabbro (Chester), granite.(Lowery)
This synthesis come from study of apx 125 samples 172 thin sections.The 7.5 minute quadrangles with the number of collected samples are: Lockhart -1, Leeds - 2, Carslile 2, Carslile SE- 9, Baton Rouge - 3, Chester- 19, Blackstock- 6, Richburg- 11, Stover 11 Catawba 1, Fort Lawn 9,Grea t Falls - 24, Flint Hill 6, Lancaster - 4 Lancaster SE 10

Metagranites and Metadiorites

Older metadiorite intrudded by metagranite.

Completely saprolotized metadiorites (red orange) and metagranite.

Mafic and felsic saprolite

Metadiorite xenoliths

618 26

Metagranite/Metadiorite complexoff St. Hwy. 97

Metagranite/Metadiorite complex
off St. Hwy. 97

Metagranite/Metadiorite complex off St. Hwy. 97

Lockhart metadiorite.Medium- to coarse-grained, relatively uniform biotite-hornblende metadiorite, that locally grades into metagabbro and metatonalite. Part of a large pluton that lies mainly in Union County, South Carolina, in the vicinity of the city of Lockhart.

Gabbro

Great Falls Metagranite

QUARTZITE

Quartzite thin sectionNo.119

Fold in quartz mica scist

Orbicular Diorite

Folds and faults

Shear Zones

Bibliography