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Stoutameyer Branch (Stotameyer Creek), West Augusta, Augusta Co., Virginia, USA

This page kindly sponsored by Robert Rothenberg
Key
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Miarolitic cavities in nepheline syenite

Stoutameyer Branch, West Augusta, Augusta Co., Virginia, USA
View parallel to orientation planes of miarolitic cavities

Stoutameyer Branch, West Augusta, Augusta Co., Virginia, USA
Latitude & Longitude (WGS84): 38° 17' 4'' North , 79° 13' 39'' West
Latitude & Longitude (decimal): 38.28444,-79.22750
GeoHash:G#: dnz9v1kr1
Köppen climate type:Cfa : Humid subtropical climate


Wrike and Kearns (2007) reported that boulders and cobbles of miarolitic nepheline syenite occur in the bed of "Stotameyer Creek". On the USGS topographic map this drainage is called Stoutameyer Branch. Material was easily located in that part of the stream adjacent to Stover Shop road, just north of Route 250.

In this gray, dense brittle rock the cavities are highly flattened and occur in planar arrays. Wrike and Kearns (2007) note that the mineral assemblage in the miarolitic cavities is similar to that of the Buck Hill intrusion several miles to the northeast.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Warren Cummings
Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Reference: Warren Cummings
'Chlorite Group'
Reference: Warren Cummings
Fluorite
Formula: CaF2
Reference: Robert Rothenberg collection

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Arfvedsonite'9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Arfvedsonite-[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
OOxygen
O AlbiteNa(AlSi3O8)
O Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
FFluorine
F FluoriteCaF2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
SiSilicon
Si AlbiteNa(AlSi3O8)
Si Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
CaCalcium
Ca FluoriteCaF2
FeIron
Fe Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2

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

Paleozoic
251.902 - 541 Ma



ID: 3187973
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. [154]

Devonian
358.9 - 419.2 Ma



ID: 2744936
Chemung Formation (redefined as Foreknobs Formation)

Age: Devonian (358.9 - 419.2 Ma)

Stratigraphic Name: Foreknobs Formation

Description: Chemung Formation (Hall, 1839). Redefined as the Foreknobs Formation (Dennison, 1970). Sandstone and shale, dark-gray and greenish-gray, fine-grained, thin- to thick-bedded, lithic sandstone and interbedded greenish gray, fissile, clay shale. Minor quartz-pebble conglomerate, thin red sandstone, and locally, fossil shell beds. Very thin or absent in southwestern Virginia; thickens to about 2500 feet northeastward in Frederick County. Gradational contact with underlying Brallier Formation and equivalent to part of the Chattanooga Shale to the southwest. Redefined and described as part of the Greenland Gap Group by Dennison (1970).

Comments: Appalachian Plateaus and Valley and Ridge Original map source: Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.

Lithology: Major:{shale,sandstone}, Minor:{conglomerate}

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Wrike, C. and Kearns, L. (2007), A Study of Syenite Dikes Possibly Related to the Buck Hill Intrusion, Augusta County, Virginia, 2007 Student Research Symposium, The Department of Geology and Environmental Science, James Madison University.
Kearns, L. et. al. (2016) Mineralogic study of microminerals in miarolitic cavities in alkali dikes, Augusta County, Virginia: Rocks and Minerals: 91 (4): 369-370.


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