The Ayusokkan tier (Є 3 as) is the tier of the upper part of the Cambrian system of the General Stratigraphic Scale of Russia, the first from the bottom [1] . Corresponds to the upper part of the Guzhang tier of the International Stratigraphic Scale . It is named after the Ayusokkan tract (from Kazakh - “bear blow”) in the mountains of Maly Karatau ( Kazakhstan ), where there are characteristic trilobites in the rocks [2] .
Notes
- ↑ Stratigraphic Code of Russia. Edition 3 / rev. ed. A.I. Jamoyd. - M .: Interdepartmental Stratigraphic Committee of Russia; VSEGEI, 2006. - S. 65. - ISBN 593761075X .
- ↑ Ayusokkan tier . VSEGEI . Date accessed June 24, 2018. Archived June 25, 2018.