Crash course to Historical Geology Flashcards
Age of Hadean
4000 Ma - 4567 Ma
- Acasta Gneiss
- Zircon
- End of Bombardment
- Formation of the Moon
Hadean Eon
Age of Archean
2500 - 4000 Ma
Eons under Precambrian
Archean and Proterozoic
- RNA and DNA-based life and Cells
- Stromatolites
- Stabilization of modern day cratons - GS Belts
- First stromatolites
Archean eon
Eras under Proterozoic eon
Paleo - proterozoic
Meso - proterozoic
Neo - proterozoic
Age of Proterozoic
635 - 2500 Ma
Period of first mass extinction
Ediacaran
- Great oxygenation
- Bushveld complex
- Huronian Glaciation (first ice age)
paleo-proterozoic era
- Rodinia starts to form
Meso-proterozoic era
- Final form and break up of rodinia
- Cryogenian ice age
- Brief formation of Pannotia (Ediacaran)
- Split off to Laurentia, Siberia, Baltica, and Gondwana
- Formation of ozone layer
- Ediacaran Biota
Neo - proterozoic
Age of Cambrian
485.4 - 538.8 Ma
- First modern animal phyla
- First vertebrates e.g. - jawless fish or agnathans
Cambrian Period
Anthrophods, mollusks, annelids, echinoderms, hemichordates, brachiopods, bryozoans, graptolites, protist
Cambrian explosion
Age of Ordovician
443.8 - 485.4 Ma
- Appearance of Jawed Fish
- Appearance of ostracoderm (armored jawless fish)
- Terrestrial plants
- Fungi
Ordivician Period
Age of Silurian
419.2 - 443.8 Ma
-Start of collision of laurentia and baltica
- Caledonian orogeny - hills and mountains of England, Scotland, Ireland, Wales, and Scandinavia
Silurian Period
Age of Devonian
358.9 - 419.2 Ma
- Greatest diversification of fish - placoderms, lobe-finned, ray finned bony fish, early cartilaginous fish, and appearance of stegocephali.
- Begining of Acadian and Taconian orogenies.
- First lycopods, ferns, seed plants, trees, and winged insects.
Devonian Period
Two sub-periods under Carboniferous
Mississippian and Pennsylvanian
Age of Mississippian
323.2 - 358.9 Ma