ISSN (print) 0868-8540, (online) 2413-5984
  • 3 of 6
Algologia 2021, 31(2): 141–149
Fossil Algae

Upper pliocene diatom complexes and its significfnce to establish lower boundary of quarter (South of the Far East)

Pushkar V.S.

An analysis of the evolutionary distribution of diatoms in the outcrops of the Late Cenozoic shows that, upon reaching the level of the Annensky Horizon (Gelazian stage), the extinct species disappear almost completely. A predominance of the alluvial type of sedimentogenesis and reduction in the lake basins areas are clearly registered for deposits of the diatom zone Aulacoseira praegranulata var. praeislandica f. praeislandica. A cooling in the Late Pliocene with the pronounced temperature minimum at the level about 2,58 million years is fairly bright reflected in the ecological structures of diatomic associations (upper complex): the benthic arcto- and north-boreal flora predominates. Of that time, a total absence of the pollen of the broad-leaved species is also characteristic and paleo-landscapes become close to the Eopleistocene ones. From this moment on, the coexistence and expansion of the polar ice sheets begin (transition of planet from the “Green house” mode to the “Ice house” mode) which determine the formation of the modern climatic system of the Earth which emphasizes the globality of the palaeoclimatic event. From the lithological point of view, the bottom of the red rocks strata of the Annensky Horizon corresponding to the Gelazian stage bottom (2,58 million years) coincides with this boundary in the southern Primorye. The age changes of the Quarter boundary to this chronostratigrahic level is well founded.

Keywords: Quarter, Pliocene, Gelazian stage, Shufansky horizon, paleoclimate, Primorye

Full text: PDF (Rus) 456K

  1. Alekseev M.N. 1978. Anthropogene of the Eat Asia. Moscow: Nauka. 2008. 108 p. [Алексеев М.Н. 1978. Антропоген Восточной Азии. М.: Наука. 208 с.]
  2. Decisions of the 4th Interdepartmental Stratigraphic Meeting on Precambrian and the Phanerozoic of the South of the Far East and Eastern Transbaikalia. 1994. Khabarovsk. 124 p. [Решения 4-го Межведомственного стратиграфического совещания по докембрию и фанерозою юга Дальнего Востока и Восточного Забайкалья. 1994. Ред. М.Т. Турбин. Хабаровск. 124 с.].
  3. Denisov E.P. 1960. To the question of the stratigraphy of the Upper Cenozoic formations of the Southwestern Primorye. Rep. Far Eastern Branch Sib. Branch USSR Acad. Sci. 12: 19–23. [Денисов Е.П. 1960. К вопросу о стратиграфии верхнекайнозойских образований Юго-Западного Приморья. Сообщ. ДВФ СО АН СССР. 12: 19-23].
  4. Kovalenko S.V. 1989. In: The Cenozoic of the Far East. Vladivostok: FEB RAS. Pp. 64–72. [Коваленко С.В. 1989. В кн.: Кайнозой Дальнего Востока. Владивосток: ДВО АН СССР. С. 64-72].
  5. Modern problems of the Neogene and Quaternary stratigraphy of Russia. 2011. Ed. Yu.B. Gladenkov. Moscow: GEOS. 108 p. [Современные проблемы стратиграфии неогена и квартера России. 2011. Ред. Ю.Б. Гладенков. М.: ГЕОС. 108 с.].
  6. Ogg J., Pillans B. 2008. Establishing quaternary as a formal international period / System. Episodes. 31(2): 230–233.
  7. Pavliutkin B.I., Petrenko T.I. 2010. Stratigraphy of Paleogene-Neogene deposits of the Primorye. Vladivostok: Dalnauka Press. 164 p. [Павлюткин Б.И., Петренко Т.И. 2010. Стратиграфия палеоген-неогеновых отложений Приморья. Владивосток: Дальнаука. 164 с.]
  8. Pillans B., Gibbard P. 2012. In: The geological time scale. Amsterdam: Elsevier. Pp. 979–1010.
  9. Pushkar V.S., Likhacheva O.Yu., Usoltseva M.V. 2019. Zonal Diatom Scale of the Continental Neogene in Primorye (Most Southern Territory of the Russian Far East). Int. J. Algae. 22(3): 163–176.
  10. Svitoch A.A. 2016. Position of lower boundaries of the international stratigraphic scale stages of upper Pliocene and Quaternary in succession of Great Caspian Sea and paleogeographical events. Bull. Mosc. Soc. Nat. 91(2-3): 63–73. [Свиточ А.А. 2016. Положение в разрезах Большого Каспия нижних границ ярусов верхнего плиоцена и квартера Международной стратиграфической шкалы и палеогеографические события. Бюл. Моск. общ-ва испыт. природы. 91(2-3): 63-73].
  11. Wang Pinxian, Zhao Quanhong, Jian Zhimin, Cheng Xinrong, Huang Wei, Tian Jun, Wang Jiliang, Li Qianyu, Li Baohua, Su Xin. 2003. Thirty million year deep-sea records in the South China Sea. Chin. Sci. Bull. 48(23): 2524–2535.