Cambrian Stage 10 (jan 1, 491000000 BC – jan 1, 486850000 BC)
Description:
Stage 10 of the Cambrian is the still unnamed third and final stage of the Furongian series. It follows the Jiangshanian and precedes the Ordovician Tremadocian Stage. The proposed lower boundary is the first appearance of the trilobite Lotagnostus americanus around 491 million years ago, but other fossils are also being discussed. The upper boundary is defined as the appearance of the conodont Iapetognathus fluctivagus which marks the beginning of the Tremadocian and is radiometrically dated as 486.85 million years ago.Added to timeline:
Date:
jan 1, 491000000 BC
jan 1, 486850000 BC
~ 4152757 years