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Cambrian

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Cambrian

The continents as they were laid out in the Cambrian

The Cambrian is the first geological period of the Paleozoic. It lasted from 541 to 485.4 million years ago.

Notable eventsEdit

GeographyEdit

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.[1]

ClimateEdit

All we know is that it was rather warm.

PlantsEdit

Plants had not evolved in the Cambrian, but it is possible that fungus and algae existed.

AnimalsEdit

Paradoxides

Trilobites were prominent in the Cambrian

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.

Anomalocaris

Anomalocaris was an large predator from the Cambrian

ReferencesEdit

  1. 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.

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