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Hanson Aggregates Flemingsburg quarry, Flemingsburg, Fleming Co., Kentucky, USA

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Latitude & Longitude (WGS84): 38° 22' 47'' North , 83° 44' 24'' West
Latitude & Longitude (decimal): 38.37972,-83.74000

A limestone aggregate quarry in the Ordovician rock. On KY 11, 2.4 miles S of KY32. Abundant vugs in fossil stromatoporoids contain calcite, barite, etc.

Ref: Mineral News: 15: 1-6,7.

Mineral List

6 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

443.8 - 485.4 Ma
Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided

Age: Ordovician (443.8 - 485.4 Ma)

Stratigraphic Name: Ashlock Formation; Grant Lake Limestone; Calloway Creek Limestone; Fairview Formation

Comments: in west-central Kentucky, collectively the thickness ranges from 65-225 m; in north-central Kentucky, collectively the thickness ranges from 21-45 m; in northeastern Kentucky, collectively the thickness ranges from 45-75 m; and in east-central Kentucky, collectively the thickness ranges from 30-90 m

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

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]

Late Ordovician
443.8 - 458.4 Ma
Grant Lake Limestone

Age: Late Ordovician (443.8 - 458.4 Ma)

Description: Limestone, rubbly appearing, mottled medium light gray, light olive gray, and bluish gray; thin bedded, very irregular to nodular bedded; consists of unsorted whole fossils and fossil fragments of various sizes in a micrograined to fine-grained argillaceous limestone matrix; very irregular gray calcareous shale partings and seams. Contains a few medium to thick, more or less tabular beds of fine- to very coarse grained, well-sorted, sparry, fossil-fragmental limestone. Very fossiliferous, mostly brachiopods and bryozoans; Platystrophia and Hebertella abundant and characteristic. Forms moderate to steep slopes. Gradational with overlying units; base not exposed. Formation 110 to 140 feet thick in adjacent quadrangles.

Comments: Ogl; Flemingsburg Quadrangle (GQ-837) | | Map description and column:

Lithology: Limestone

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

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

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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