| system | Department | tier | Age, million years ago | |
|---|---|---|---|---|
| a piece of chalk | Lower | Berriassky | less | |
| Yura | Top (malm) | Titan | 152.1-145.0 | |
| Kimmeridge | 157.3-152.1 | |||
| Oxford | 163.5-157.3 | |||
| Average (dogger) | Callovian | 166.1-163.5 | ||
| Batsky | 168.3-166.1 | |||
| Bayos | 170.3-168.3 | |||
| Aalen | 174.1-170.3 | |||
| Lower (lias) | Toarsky | 182.7-174.1 | ||
| Plinsbach | 190.8-182.7 | |||
| Sinemursky | 199.3-190.8 | |||
| Gettang | 201.3-199.3 | |||
| Triassic | Upper | Rhetic | more | |
| The division is given in accordance with the IUGS as of December 2016 | ||||
The Gettang tier ( gettang ) is a stratigraphic subsection, the lower tier of the lower section of the Jurassic system of the Mesozoic era. Covers the time from 201.3 Β± 0.2 million years ago to 199.3 Β± 0.3 million years ago.
Deposits of the Gettang tier are covered by rocks of the Reth tier of the Mesozoic Triassic period , overlain by sediments of the Sinimur tier of the Jurassic Mesozoic.
First identified by the Swiss geologist Eugene Renevier in 1864 . The name received from the city of Ottange-Gran in the canton of Catten France.
Notes
References and Sources
- Mining Encyclopedic Dictionary , vol. 3. / Ed. V.S. Beletsky . - Donetsk: East Publishing House, 2004. - 752 p. ISBN 966-7804-78-X (Ukrainian)