South australian fossil records neoproterozoic early cambrian
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SOUTH AUSTRALIAN FOSSIL RECORDS, NEOPROTEROZOIC-EARLY CAMBRIAN . Graeme, Nolen, Anthony, Karl Case Study 1. Geologic Time Period . Neoproterozoic – Early Cambrian. This is the period of transition from the Precambrian to the Cambrian era.

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South australian fossil records neoproterozoic early cambrian

SOUTH AUSTRALIAN FOSSIL RECORDS, NEOPROTEROZOIC-EARLY CAMBRIAN

Graeme, Nolen, Anthony, Karl

Case Study 1


Geologic time period
Geologic Time Period CAMBRIAN

Neoproterozoic – Early Cambrian.

This is the period of transition from the Precambrian to the Cambrian era.

The study was based on sedimentary sequences in southern Australia.


Critters
Critters! CAMBRIAN

Sabelliditids

Skeletogenous

Ediacaran Fauna


Ediacara sequence
EDIACARA SEQUENCE CAMBRIAN

  • The Ediacaran sequence marks the “extinction” of the Ediacaran fauna (a soft bodied organism.


Uratanna sequence
URATANNA SEQUENCE CAMBRIAN

  • The Urtatanna sequence represents an environmental change in sea level depth.

  • The fluctuation of sabelliditids (worm-like critters) occurs.


Parachilna sequence
PARACHILNA SEQUENCE CAMBRIAN

  • The Parachilna sequence represents a further change in sea level.

  • This is the time period in which skeletogenous (hard bodied) critters exploded onto the scene.


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