e/Trempealeauan

Information
has gloss	eng: The Trempealeauan is the upper or latest stage of the Upper or Late Cambrian in North America, spanning about 4 million years from about 492.5 to 488.3 m.y.a., equivalent to the Fengshanian of China. The name comes from the Trempealeau Formation, named for the town of Trempealeau in western Wisconsin, located on the Mississippi River.
lexicalization	eng: Trempealeauan
instance of	(noun) from 544 million to about 500 million years ago; marine invertebrates Cambrian, Cambrian period