The biostratigraphic and palaeoenvironmental significance of Lower Cambrian (Botomian) trilobites from the Ak-Kaya section of the Altai Mountains (southern Siberia, Russia)

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Авторы: Korovnikov I.   (ИНГГ СО РАН)   Sennikov N.   (ИНГГ СО РАН)   Danelian T.     Obut O.   (ИНГГ СО РАН)   Pouille L.    
дата публикации: 2013
The presence of one of the oldest records of polycystine Radiolaria in the Lower Cambrian sedimentary sequence of the Ak-Kaya section (Gorny Altai) requires a biostratigraphic dating. The trilobites found recently a few tens of meters below the radiolarian-bearing level belong to Calodiscus resimus Repina, Serrodiscus fossuliferus Repina and Alacephalus aff. contortus Repina; they suggest that this part of the Shashkunar Formation can be correlated with the lower part of the Botomian stage. The absence of eyes in the two former species suggests a mode of life buried in the fine pelagic sediments. Indications of the presence of a strongly developed musculature on the third species point to a palaeoenvironment characterized by a relatively high hydrodynamic regime
первоисточник: Annales de Paleontologie
том: 1
страницы: 79-89
внешние ссылки:
WoS   WoS (цитирование)






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