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Voca Frac Sand District

Producer in McCulloch county in Texas, United States with commodities Sand and Gravel, Industrial/Frac Sand, Sand and Gravel, Industrial
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Host and associated rocks
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Ownership information
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10401034
Record type District
Current site name Voca Frac Sand District

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -99.17341, 30.98513 (WGS84)
Location accuracy 10(meters)
Relative position Ore body is exposed at the surface and clearly visible on satellite imagery for nearly 10 km stretching NE to SW along Tiger Creek, south of the San Saba River. Each of the 4 company properties is distinct on the satellite imagery. Coordinates given are approximate centroid of the deposit.

Site location context

Political divisions (FIPS codes)

McCulloch(county)

Texas(state)

United States(country)

USGS map quadrangles

Spice Rock(quadrangle 1:24,000 scale)

Mason(quadrangle 1:100,000 scale)

Llano(quadrangle 1:250,000 scale)

Geographic areas

Country State County
United States Texas McCulloch

Commodities

Commodity Importance
Sand and Gravel, Industrial/Frac Sand Primary
Sand and Gravel, Industrial Primary

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock type qualifier fine to coarse grained sandstone and conglomerate: exceptionally well-rounded grains, hematite-cemented, max thickness 800 ft
    Rock unit name The Hickory Sandstone Member is basal member of Riley Formation of the Moore Hollow Group
    Stratigraphic age (youngest) Middle Cambrian

Nearby scientific data

Ore Body (1) -99.17341, 30.98513
ListMap

Economic information

Comments on the geologic information

  • The Hickory Sandstone Member is basal member of Riley Formation (of the Moore Hollow Group of middle(?) to late Cambrian age. Riley Formation in Llano uplift (in Moore Hollow area of Riley Mtns., central Texas) is about 600 to nearly 800 ft thck; thickest in southeast Llano Co., thinnest in northwest corner of uplift. The Riley ovelries precambrian rocks and underlies Wilberns Fm. The Hickory, in NW part of Llano area is described on the Llano Sheet (Geologic Atlas of Texas, 1981) as follows, Upper part--medium to coarse-grained sandstone, exceptionally well-rounded grains, hematite-cemented, iron content averages about 10 percent, dusky-red; a scarp slopes down to a cultivated bench that centers on the contact between the red and the silty parts of the unit; thickness about 90 ft. Middle part--mostly fine to medium-grained ss., argillaceous, silty, commonly thinly bedded and micaceous; forms a low hilly scarp, thickness about 270 ft. Lower part--mostly fine- to coarse-grained ss, poorly sorted grains rounded to subrd., light-yellowish-gray; granitic (and quartz) (Mutis-Duplat, 1982) pebble conglomerate locally as much as 75 ft thick at base (Paige, 1912); forms gently rolling land, mostly irrigated using water from this unit, thickness 100 +-ft, varies owing to relief on the surface on which the lower part was deposited. All the upper and most of the middle units grade laterally southeast to Cap Mountain Limestone. Thickness of Hickory Ss. Mbr. 275-470 ft, locally missing where monadnocks on underlying Precambrian rock are present.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic

Mining district

District name Voca Frac Sand District

Ownership information

  • Type Owner
    Owner Proppant Specialists
    Year 2014
  • Type Owner
    Owner Carmeuse Industrial Sands
    Year 2014
  • Type Owner
    Owner Unimin
    Year 2014
  • Type Owner
    Owner Cadre Proppants
    Year 2014

Reference information

Bibliographic references

  • Deposit

    Kyle, J.R., and McBride, E.F., 2012, Geology of the Voca Frac Sand District, western llano Uplift, Texas: Proceedings of the 48th Annual Forum on the Geology of Industrial Minerals, Arizona Geological Survey Special Paper 9, Ch. 2, 13 p.

General comments

Subject category Comment text
General Probably also includes 3 old MRDS records for the San Saba Quarry (10130177), Voca Pit & Plant (10162919), and Texas Mining Corp. Sand Pit (10129865).

Reporter information

Type Date Name Affiliation Comment
Reporter 2014-03-14 Wilson, Anna B. U.S. Geological Survey
Updater 2014-07-22 Heran, William D U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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