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

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  • 1. Geology Chester County, SC
  • 2. geologic map at a scale 1:250,000 and depicts my synthesis of the detailed data presented on open file 1:2400 maps
  • 3. 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
  • 4. Metagranites and Metadiorites
  • 5. Older metadiorite intrudded by metagranite.
  • 6. Completely saprolotized metadiorites (red orange) and metagranite.
  • 7. Mafic and felsic saprolite
  • 8. Metadiorite xenoliths
  • 9. 618 26
  • 10. Metagranite/Metadiorite complexoff St. Hwy. 97
  • 11. Metagranite/Metadiorite complex off St. Hwy. 97
  • 12. Metagranite/Metadiorite complex off St. Hwy. 97
  • 13. 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.
  • 14. Gabbro
  • 15. Great Falls Metagranite
  • 16. QUARTZITE
  • 17. Quartzite thin sectionNo.119
  • 18. Fold in quartz mica scist
  • 19. Orbicular Diorite
  • 20. 1/13/2006 303 9/11/2003 133 Geologic map of the Metagranite Generalized geologic map of the Great Falls metagranite and surrounding rocks. Explanation: MGR- Great Falls metagranite, GN -gneiss complex, GB -gabbro, ƒ- sheared rocks, dd -diabase dikes, M -mafic dike concentration, z -zeolite mineralization, s - skarn. From Privett, 1984.
  • 21. Folds and faults
  • 22. Shear Zones
  • 23. Northsouthstrikingverticalmaficdike. Maficdikecuttingmassivemetagranite. North-southmaficdikeoffsetbynearlyeastwestdike. Close-up. GreatFallsoftheCatawba.GeneralAerialView ThisspillwaydamwasbuiltatoptheGreatFallsoftheCatawba. Eastsideoftheriver,priortodiversiontheriverhadcutdeeplyinto unjointedmetagranite.Polishedmetagraniteatbaseofthefalls.Pothole inpolishedmetagranite.
  • 24. Bibliography