Blaylock Sandstone

Blaylock Sandstone
Stratigraphic range: Silurian
Type Formation
Unit of none
Sub-units none
Underlies Missouri Mountain Shale
Overlies Polk Creek Shale
Thickness up to 1200 feet[1]
Lithology
Primary Sandstone
Location
Region Arkansas, Oklahoma
Country United States
Type section
Named for Blaylock Mountain, Montgomery County, Arkansas
Named by Albert Homer Purdue[2][3]

The Blaylock Sandstone is a Silurian geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892,[4] this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas.[2][3] Purdue assigned the Blaylock Mountain in Montgomery County, Arkansas as the type locality, but did not designate a stratotype. As of 2017, a reference section for this unit has yet to be designated.

Paleofauna

Graptolites

D. decussatus[5]
  • Gladiograptus
G. perlatus[5]
M. argutus[5]
M. distans[5]
M. gregarius[5]

See also

References

  1. ↑ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 20–21.
  2. 1 2 Purdue, A.H. (1909). Slates of Arkansas. Geological Survey of Arkansas. p. 30, 35.
  3. 1 2 Purdue, A.H. (1909). "Structure and stratigraphy of the Ouachita Ordovician area, Arkansas (abstract)". Bulletin of the Geological Society of America. 19: 556–557.
  4. ↑ Griswold, L.S. (1892). "Whetstones and the novaculites". Annual Report of the Geological Survey of Arkansas for 1890. 3.
  5. 1 2 3 4 5 6 Miser, Hugh D.; Purdue, A.H. (1929). "Geology of the De Queen and Caddo Gap quadrangles, Arkansas". U.S. Geological Survey Bulletin. 808: 45.
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