A series of roadcuts through Ordovician shales and limestones to the east and west of White Oak Creek, WNW of the city of Georgetown.
Mineralization is heavily concentrated fossil materials with some mineralization.
Regions containing this locality
|North America Plate||Tectonic Plate|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
10 valid minerals.
Detailed Mineral List:
| ⓘ Baryte|
| ⓘ Dolomite var: Ferroan Dolomite|
| ⓘ Goethite|
| ⓘ Marcasite|
| ⓘ Pyrite|
| ⓘ Quartz|
| ⓘ Sphalerite|
| ⓘ Strontianite|
List of minerals arranged by Strunz 10th Edition classification
|Group 2 - Sulphides and Sulfosalts|
|Group 4 - Oxides and Hydroxides|
|Group 5 - Nitrates and Carbonates|
|ⓘ||var: Ferroan Dolomite||5.AB.10||Ca(Mg,Fe)(CO3)2|
|Group 7 - Sulphates, Chromates, Molybdates and Tungstates|
List of minerals arranged by Dana 8th Edition classification
|Group 2 - SULFIDES|
|AmXp, with m:p = 1:1|
|AmBnXp, with (m+n):p = 1:2|
|Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL|
|Group 14 - ANHYDROUS NORMAL CARBONATES|
|Group 28 - ANHYDROUS ACID AND NORMAL SULFATES|
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
|Unclassified Minerals, Mixtures, etc.|
var: Ferroan Dolomite
List of minerals for each chemical element
|C||ⓘ Dolomite (var: Ferroan Dolomite)||Ca(Mg,Fe)(CO3)2|
|O||ⓘ Dolomite (var: Ferroan Dolomite)||Ca(Mg,Fe)(CO3)2|
|Mg||ⓘ Dolomite (var: Ferroan Dolomite)||Ca(Mg,Fe)(CO3)2|
|Ca||ⓘ Dolomite (var: Ferroan Dolomite)||Ca(Mg,Fe)(CO3)2|
|Fe||ⓘ Dolomite (var: Ferroan Dolomite)||Ca(Mg,Fe)(CO3)2|
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
251.902 - 541 Ma
|Paleozoic sedimentary rocks|
Age: Phanerozoic (251.902 - 541 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Hirnantian - Sandbian|
443.8 - 458.4 Ma
|Grant Lake Limestone and Fairview Formation, Undivided|
Age: Late Ordovician (443.8 - 458.4 Ma)
Stratigraphic Name: Grant Lake Formation; Fairview Formation
Description: Limestone and shale, interbedded; gray to bluish-gray weathers light gray to yellowish-gray; planar to lenticular, thin to medium bedded in lower half; wavy to irregular to nodular, thin to thick bedded in upper half; fossiliferous.
Comments: Secondary unit descriptions from USGS Lexicon website (ref. OH017) and OH012, OH013: Grant Lake Limestone and Grant Lake Formation are adopted by the Ohio Geological Survey for southwestern OH. The shale content of the Grant Lake Limestone progressively increases between Maysville, KY, and Cincinnati, OH. The term Grant Lake Formation is used where the unit becomes predominantly shale (50 to 60%). The Grant Lake Formation is divided into (ascending) Bellevue, Corryville, and Mount Auburn Members. Name is applied in Butler, Hamilton, and Warren Cos. and in portions of Brown, Clermont, and Clinton Cos. Type section is designated as the composite section exposed along Stonelick Creek in Clermont Co., OH (Ohio Geological Survey measured sections 16831, 16836, 16837, and 16852). Ohio Geological Survey cores 868, 2537, 2620, 2627, 2981, and 2982 are designated as principal reference sections. The Grant Lake Limestone is redefined to include those stratigraphic sequences that contain less than a mean value of 50% calcareous, fossiliferous shale. Road cuts created for KY Rte 11, near Maysville, are designated as principal reference sections. Unit is divided into the Bellevue, Corryville, and Straight Creek (new name) Members. Name is applied in Adams and Highland Cos. and in portions of Brown, Clermont and Clinton Cos. The Grant Lake overlies the Miamitown Shale or Fairview Formation and underlies the informal Arnheim formation, all of the informal Cincinnati group (Schumacher and others, 1991). Fairview Formation: The Kope-Fairview-Bellevue succession is the first of three major progradational units that compose the Cincinnatian Series in the Cincinnati, OH, area. Each succession is interpreted as a mixed siliciclastic-carbonate ramp. The Kope Formation is the most distal facies of the ramp complex. The Fairview Formation is the intermediate-depth lithofacies in the upward-shoaling succession. Unit is 20 to 35 m thick and is composed of subequal proportions of thin-bedded, fine to coarse skeletal limestone and gray, thin-bedded shales and minor siltstone. The North Bend Tongue is separated from the main body of the Fairview by the Wesselman Tongue of the Kope. The North Bend becomes indistinguishable 15 to 20 km northwest of Cincinnati. Faunal assemblages in the Fairview are marked by changes in type and morphologic character due to an increase in physical energy. Larger brachiopods and ramose trepostome bryozoans are common. Interfingers to the southeast with Calloway Creek Formation and to the northwest with the upper part of the Kope Formation. Age shown as largely Maysvillian; Edenian very locally south of the Ohio River (Jennette and Pryor, 1993). Original map source: Slucher, E.R., (principal compiler), Swinford, E.M., Larsen, G.E., and others, with GIS production and cartography by Powers, D.M., 2006, Bedrock geologic map of Ohio: Ohio Division of Geological Survey Map BG-1, version 6.0, scale 1:500,000.
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.