Ch 12 Proterozoic Eon
Proterozoic Eon
Proterozoic Eon
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Neoproterozoic life<br />
• Transition from Mesoproterozoic to<br />
Neoproterozoic was marked by an adaptive<br />
radiation of eukaryotes at ~1.0 Ga<br />
– Mainly an increase in the diversity of acritarchs<br />
• But, by the end of <strong>Proterozoic</strong> time,<br />
stromatolites had declined in abundance<br />
and unquestioned multicellular animals<br />
had spread to many regions of the Earth<br />
Earth History, <strong>Ch</strong>. <strong>12</strong> 14
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