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CSR Column 3

Trempealeauan

Franconian

Dresbachian

Middle Cambrian

Current Database Statistics:

23,843 lithostratigraphic rock units in North America

6,977 gap-bound rock packages in North America

39,289 Paleobiology Database collections matched to rock units in North America

798 lithostratigraphic rock units in Caribbean

243 gap-bound rock packages in Caribbean

854 Paleobiology Database collections matched to rock units in Caribbean

2,168 lithostratigraphic rock units in New Zealand

828 gap-bound rock packages in New Zealand

323 Paleobiology Database collections matched to rock units in New Zealand

7,124 sedimentary units in Deep Sea

Peters, S.E. and R.R. Gaines. 2012. Formation of the ‘Great Unconformity’ as a trigger for the Cambrian explosion. Nature 484:363-366. [link]