Английская Википедия:Blakely Sandstone

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Шаблон:Infobox rockunit

The Blakely Sandstone is a Middle Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892,[1] this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas. Purdue had initially named this unit the Caddo Shale at a 1907 Geological Society of America meeting,[2] but later redefined and renamed the unit as the Ouachita Shale.[3] He again renamed the unit to the Blakely Sandstone in a letter to Edward Oscar Ulrich, to which Ulrich used in a 1911 publication, becoming the first reference using this name.[4] Ulrich assigned the Blakely Mountain in Garland 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

Conodonts

C. horridus[5]
H. holodentata[5]
L. quadratus[5]
P. costatus[5]
P. aculeatus[5]

Graptolites

D. euodes[6]
D. manus[6]
D. spinosus[6]
G. echinatus[6]
G. horridus[6]

See also

Шаблон:Portal

References

Шаблон:Reflist


Шаблон:US-geologic-formation-stub

  1. Шаблон:Cite journal
  2. Шаблон:Cite journal
  3. Шаблон:Cite book
  4. Ошибка цитирования Неверный тег <ref>; для сносок Ulrich не указан текст
  5. 5,0 5,1 5,2 5,3 5,4 5,5 Шаблон:Cite book
  6. 6,0 6,1 6,2 6,3 6,4 6,5 6,6 6,7 Шаблон:Cite journal