Sinemurian
Geologic period
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In the geologic timescale, the Sinemurian is an age and stage in the Early or Lower Jurassic Epoch or Series. It spans the time between 199.5 ±0.3 Ma and 192.9 ±0.3 Ma. The Sinemurian is preceded by the Hettangian and is followed by the... Wikipedia
Occurred: 199.3 (+/- 0.3) million years ago - 190.8 (+/- 1) million years ago
Epoch: Early Jurassic
Lower boundary GSSP: East Quantoxhead, West Somerset, England, UK; 51°11′27″N 3°14′11″W / 51.1909°N 3.2364°W
Lower GSSP ratified: 2000
Fossils: UCMP 37302, UCMP 77270, UCMP 130053, and more
Organisms
