The Trempealeauan is the uppermost stage of the (Upper) Cambrian in the established North Amercian stratigraphy with application to world wide chronology. The Trempealeauan overlies the middle Upper Cambrian Franconian Stage and just preceeds the Lower Ordovician Gasconadian.
Common, especially in the North American paleontological literature, the Trempealeauan remains a useful term.
The term Trempealeauan appears in the following references, as well as in numerous others.
- Flower, R.H 1954; Cambrian Cephalopods, Bulletin 40, New Mexico Bureau of Mines and Mineral Resources, Socorro, NM.
- Flower, R.H. 1964; The Nautiloid Order Ellesmeroceratida (Cephalopoda), Memoir 12, New Mexico Bureau of Mines and Mineral Resources, Socorro, NM.
- Moore, Lalicker, and Fischer; Invertebrate Fossils, McGraw-Hill, 1952.
- Teichert C, 1988; Main Features of Cephalopod Evolution, in The Mollusca, Vol 12, Clarke an Trueman, Eds, Academic Press.