Английская Википедия:Angwa Sandstone

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Infobox rockunit The Angwa Sandstone is a geological formation of the mid-Triassic Cabora Bassa Basin [1]and Mana Pools Basin [2]of southern Africa, consisting mainly of sandstone.[3]

Description

Stratigraphy

The Angwa Sandstone is the lowest formation in the Upper Karoo Group of the Karoo Supergroup, underlying the Pebbly Arkose Formation and overlying the Lower Karoo Group.[4] The formation is divided into two members: the Alternations Member and the Massive Sandstone (Chirambakadoma) Member.[1]

The Angwa Sandstone has been correlated to the Molteno Formation of the Great Karoo Basin, South Africa,[5][1] and to the Escarpment Grit of the Mid-Zambezi Basin.[6]

Lithology

The formation is a sedimentary unit, consisting mainly of fluvial sands and silts.[1]

It has been dated as covering rocks from much of the Triassic, with pollen and flora identified from the Induan, and Ladinian to Norian.[5][7]

Occurrence

The Angwa Sandstone Formation is found in Mozambique, Zambia, Zimbabwe, in the Mana Pools and Cabora Bassa Basins.

Fossil Content

Pinales of the Angwa Sandstone
Genus Presence Notes Images
Dadoxylon Mbire District and Chirundu, Zimbabwe Шаблон:Center
Callistophytaceae (Pteridospermopsida) of the Angwa Sandstone
Genus Presence Notes Images
Lepidopteris Manyima River, Mbire District, Zimbabwe Шаблон:Center
Dicroidium Manyima River, Mbire District, Zimbabwe Шаблон:Center
Ginkgoales of the Angwa Sandstone
Genus Presence Notes Images
Sphenobaiera Manyima River, Mbire District, Zimbabwe Шаблон:Center

References

Шаблон:Reflist

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