It is still debated how exactly the continents were positioned in the Cambrian. Sea levels were high (as a result of the melting ice from Snowball Earth), and land was concentrated in the Southern Hemisphere.
All we know is that it was rather warm.
Plants had not evolved in the Cambrian, but it is possible that fungus and algae existed.
The Cambrian was the time of the Cambrian Explosion, when animals evolved very rapidly from jelly-like blobs into hard-shelled, some predatory creatures. Well-preserved examples of these can be found in the Burgess Shale of western Canada. This was the golden age of the trilobites; after the Cambrian they slowly declined as bigger, better predators evolved.
- ↑ Mckerrow, W. S.; Scotese, C. R.; Brasier, M. D. (1992). "Early Cambrian continental reconstructions". Journal of the Geological Society 149 (4): 599–593. doi:10.1144/gsjgs.149.4.0599.