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Johnson Vein, Scott Co., Kentucky, USA

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Latitude & Longitude (WGS84): 38° 15' 0'' North , 84° 36' 59'' West
Latitude & Longitude (decimal): 38.25006,-84.61659
Köppen climate type:Cfa : Humid subtropical climate


No description has been added for this locality. Can you add one?

Mineral List


4 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Late Ordovician - Middle Ordovician
443.8 - 470 Ma



ID: 1859654
Clays Ferry Formation

Age: Ordovician (443.8 - 470 Ma)

Description: Main unit Limestone and shale, interbedded: Limestone is micrograined, fossiliferous with micrograined calcite matrix, and fine-grained bioclastic. Shale, probably about half of unit, weathers to yellowish-gray clayey soil. Poorly exposed. \nArgillaceous limestone and shale below the upper tongue of Millersburg Member: Limestone and shale, interbedded: Limestone (50 percent of unit) is argillaceous, medium gray, micrograined, unfossiliferous; in smooth-surfaced even to lenticular beds. Shale weathers to yellowish-gray clayey soil. In southernmost part of quadrangle, where poorly exposed, mapped with underlying unit. May be a tongue of Clays Ferry Formation.

Comments: Ocf; Georgetown Quadrangle (GQ-605) | http://kgs.uky.edu/kgsweb/PubsSearching/MoreInfo.asp?titleInput=774 | Map description and column: http://kgs.uky.edu/kgsmap/kgsgeoserver/geolDescID.asp?idType=pointID&fmcode=361CLFR&gq_num=605&map_level=24K

Lithology: Limestone | shale | interbedded

Reference: KGS Databases, Maps, and Publications. Kentucky 1:24,000 Geologic Map. Kentucky Geological Survey. [22]

Middle Ordovician
458.4 - 470 Ma



ID: 3008059
Lexington Limestone

Age: Middle Ordovician (458.4 - 470 Ma)

Stratigraphic Name: Lexington Limestone

Comments: in west-central Kentucky, the thickness is 60-110 m; in north-central Kentucky the thickness is 15-60+ m; in northeastern Kentucky, the thickness is at least 45+ m; in east-central Kentucky, the thickness is 55-95 m; Middle Ordovician age

Lithology: Major:{limestone}, Minor:{shale}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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