The Pebbly Arkose Formation is a

Late Triassic The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch a ...

geologic

formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondary ...

found in southern Africa.

Geology

Description

The formation comprises mainly coarse, arkosic

sandstone Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...

Extent

The Pebbly Arkose Formation is found in

Botswana Botswana, officially the Republic of Botswana, is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory part of the Kalahari Desert. It is bordered by South Africa to the sou ...

Zambia Zambia, officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa. It is typically referred to being in South-Central Africa or Southern Africa. It is bor ...

and

Zimbabwe file:Zimbabwe, relief map.jpg, upright=1.22, Zimbabwe, relief map Zimbabwe, officially the Republic of Zimbabwe, is a landlocked country in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Bots ...

, in the Mid-Zambezi, Mana Pools, Cabora Bassa and Limpopo basins.

Stratigraphy

The Pebbly Arkose Formation is part of the

Upper Karoo Group The Upper Karoo Group is a sequence of Triassic to Early Jurassic sedimentary and volcanic rocks found in Botswana, Zambia, and Zimbabwe. It comprises the Escarpment Grit (in the Mid-Zambezi and Limpopo basins) and the Angwa Sandstone (in the Ma ...

, overlies the Escarpment formation (in the Mid-Zambezi and Limpopo basins) and the Angwa Sandstone Formation (in the Mana Pools and Cabora Bassa Basins) and underlies the

Forest Sandstone Formation The Forest Sandstone is a geological formation in southern Africa, dating to roughly between 200 and 190 million years ago and covering the Hettangian to Sinemurian stages of the Jurassic Period in the Mesozoic Era. As its name suggests, it cons ...

. The Pebbly Arkose has been correlated to the

Elliot Formation The Elliot Formation is a geological formation and forms part of the Stormberg Group, the uppermost geological group that comprises the greater Karoo Supergroup. Outcrops of the Elliot Formation have been found in the northern Eastern Cape, so ...

of the Great Karroo Basin, South Africa and the Mpandi Formation of the Thuli Basin in Botswana and Zimbabwe.

Fossil content

Flora

Vertebrate fauna

= Archosaur

= Reptiles

= Synapsids

= Fish

References

Bibliography

* {{cite book , editor-last=Weishampel , editor-first=David B. , editor-link=David B. Weishampel , editor-last2=Dodson , editor-first2=Peter , editor-link2=Peter Dodson , editor-last3=Osmólska , editor-first3=Halszka , editor-link3=Halszka Osmólska , year=2004 , title=The Dinosauria , edition=2nd , url=https://books.google.com/books?id=vtZFDb_iw40C , publisher=Berkeley: University of California Press , pages=1–880 , access-date=2019-02-21 , isbn=0-520-24209-2 Geologic formations of Botswana Geologic formations of Zambia Triassic Zimbabwe Triassic System of Africa Carnian Stage Sandstone formations Alluvial deposits Paleontology in Zimbabwe