Missouri Mountain Shale

Missouri Mountain Shale
Stratigraphic range: Silurian
Type Formation
Unit of none
Sub-units none
Underlies Arkansas Novaculite
Overlies Blaylock Sandstone
Thickness up to 300 feet[1]
Lithology
Primary Shale
Location
Region Arkansas, Oklahoma
Country United States
Type section
Named for Missouri Mountains, Polk County and Montgomery County, Arkansas
Named by Albert Homer Purdue[2][3]

The Missouri Mountain Shale 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 Missouri Mountains in Polk and Montgomery counties, 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.

See also

References

  1. ↑ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 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.
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