Geology of Chester County,S. C.
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Transcript of Geology of Chester County,S. C.
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