Mazarn Shale

Mazarn Shale
Stratigraphic range: Ordovician
TypeFormation
Unit ofnone
Sub-unitsnone
UnderliesBlakely Sandstone
OverliesCrystal Mountain Sandstone
Thickness1000 to 2500+ feet
Lithology
PrimaryShale
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named forMazarn Creek, Montgomery County, Arkansas
Named byHugh Dinsmore Miser

The Mazarn Shale is an Early Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. This interval was first described in 1892, but remained unnamed until 1918 as part of a study by U.S. Geological Survey geologist Hugh Dinsmore Miser.

Paleofauna

Graptolites

C. wrighti
C. antennarius
D. caduceus
D. caduceus nana
D. extensus
D. filiformis
D. nitidus
D. similis
G. hystrix
P. typus
T. clarkei
T. fruticosus
T. quadribrachiatus
T. pendens
T. serra
T. similis

See also

References

  1. ↑ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 18. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-08.
  2. 1 2 Miser, H.D. (1918). "Manganese deposits of the Caddo Gap and De Queen quadrangles, Arkansas". U.S. Geological Survey Bulletin. 660-C: 68.
  3. ↑ Griswold, I.S. (1892). "Whetstones and the novaculites". Annual Report of the Geological Survey of Arkansas for 1890. 3.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Miser, Hugh D.; Purdue, A.H. (1929). "Geology of the De Queen and Caddo Gap quadrangles, Arkansas". U.S. Geological Survey Bulletin. 808: 27–28.
  5. 1 2 Pitt, William D.; Cohoon, Richard R.; Lee, Harry C.; Robb, Marion G; Watson, John (January 1961). "Ouachita Mountain core area, Montgomery County, Arkansas". Bulletin of the American Association of Petroleum Geologists. 45 (1): 79–80. Retrieved 8 January 2018.