The Khatyspyt Formation is a

Neoproterozoic The Neoproterozoic Era is the unit of geologic time from 1 billion to 538.8 million years ago. It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran periods. It is ...

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 ...

exposed in the

Olenëk Uplift The Olenyok (russian: Оленёк, sometimes spelled ''Оленек'', ''Olenek''; sah, Өлөөн, Ölöön) is a major river in northern Siberian Russia, west of the lower Lena and east of the Anabar. It is long, of which around is navigable. ...

of north central

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part o ...

, which contains the only known instance of the

Ediacara biota The Ediacaran (; formerly Vendian) biota is a taxonomic period classification that consists of all life forms that were present on Earth during the Ediacaran Period (). These were composed of enigmatic tubular and frond-shaped, mostly sessil ...

preserved in a limestone bed. The Khatyspyt Formation forms one of the major parts of the

Khorbusuonka Group The Khorbusuonka (russian: Хорбусуонка) is a river in Yakutia (Sakha Republic), Russia. It is a tributary of the Olenyok with a length of and a drainage basin area of . The river flows north of the Arctic Circle across a lonely, des ...

; underlying the Khatyspyt are

dolomite Dolomite may refer to: *Dolomite (mineral), a carbonate mineral *Dolomite (rock), also known as dolostone, a sedimentary carbonate rock *Dolomite, Alabama, United States, an unincorporated community *Dolomite, California, United States, an unincor ...

s of the

Mastakh Formation Mastakh (russian: Мастах; sah, Мастаах, ''Mastaax'') is a rural locality (a '' selo'') and the administrative center of Lyuchcheginsky 2-y Rural Okrug of Kobyaysky District in the Sakha Republic, Russia, located from Sangar, the a ...

and their overlying

red bed Red beds (or redbeds) are sedimentary rocks, typically consisting of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of ferric oxides. Frequently, these red-colored sedimentary strata locally contain th ...

s; the Turkut Formation overlies the Khatyspyt. The Khatyspyt and part of the overlying Turkut comprise a major shallowing upward marine carbonate sequence. ''

Khatyspytia ''Khatyspytia'' is a frondose Frondosity (from Latin ''frondōsus'' meaning 'leafy') is the property of an organism that normally flourishes with fronds or leaf-like structures. Many frondose organisms are thalloid and lack the organizatio ...

'' is named after this formation.

References

{{reflist Geologic formations of Russia Geology of Siberia Ediacaran Asia