Formation of the Great Lakes Part 2 Precambrian and Paleozoic. History Channel Video Chapter 2 in Grady Chapter 2 in Greenberg. Great Lakes Basin in the Precambrian. Foundation for Great Lakes Basin (GLB) was formed over 3 bya in Precambrian Canadian Shield Igneous rocks
Formation of the Great LakesPart 2Precambrian and Paleozoic
History Channel Video
Chapter 2 in Grady
Chapter 2 in Greenberg
Floating cyanobacterial mat from a hot spring
Fossilized cyanobacterial mat
Colonial chroococcalean cyanobacterium from the Bitter Springs chert of central Australia, a site dating to the Late Proterozoic, about 850 million years old.
Palaeolyngbya also from the Bitter Springs chert.
Doing the backstroke among the stromatolites in a tropical Precambrian sea
Banded Iron Formations
Precambrian Animals650 to 544 mya
Ediacaran Fauna of Australia and Newfoundland, CA
Soft Bodied Invertebrates
Avalon Peninsula Newfoundland, CA
Cyclomedusa a jellyfish
Charnia masoni - no known living descendants
Dickinsonia costata – early relative of earthworms?
Trace fossils of primitive worms
Precambrian Ocean – Ediacaran Fauna 620 to ~543 mya
Shallow seas covered GLB
The Cambrian Explosion
570-505 million years ago