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The Challenges of Life on Land

The Challenges of Life on Land. Suitable Climate: O 2. http://www.bgc-jena.mpg.de/bgc-theory/uploads/Pubs/2008-PaleoJ-AK-F1.jpg. Suitable Climate: CO 2. Fig. 3.3 in Willis and McElwain 2002. Land. Rodinia (1 bya). Rodinia Breakup (750 mya). https://webspace.utexas.edu/cokerwr/

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The Challenges of Life on Land

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  1. The Challenges of Life on Land

  2. Suitable Climate: O2 http://www.bgc-jena.mpg.de/bgc-theory/uploads/Pubs/2008-PaleoJ-AK-F1.jpg

  3. Suitable Climate: CO2 Fig. 3.3 in Willis and McElwain 2002

  4. Land Rodinia (1 bya) Rodinia Breakup (750 mya) https://webspace.utexas.edu/cokerwr/ www/slides/anacatlan/rodinia2.jpg http://www.clas.ufl.edu/users/jmeert/rod.jpg

  5. Land Gondwana and EuroAmerica (390 mya) http://www.paleoportal.org/kiosk/sample_site/period_13.html

  6. Glaciers, Land and Sea Fig. 3.2 in Willis and McElwain 2002

  7. Soil Formation: Fossil Evidence for Well Established Soil Profiles Ordovician (440 MYA) Willis and McElwain 2002

  8. Soil Formation: Mechanical

  9. Soil Formation: Weathering (Oxidation)

  10. Soil Formation: Weathering (Microbe and Acid Rain Mediated Breakdown) Estimated CO2 Levels Cyanobacterial Mats Willis and McElwain 2002

  11. Soil Formation: Role of Lichens (400 MYA) (650-550 MYA?)

  12. Soil Formation: Nutrient Leaching

  13. The Transition to Land Submerged Chara The First Land Plants

  14. FOSSIL VASCULAR TISSUE “Tracheids” (430 MYA) “Tubes” (400 MYA) (Willis and McElwain 2002)

  15. FOSSIL STOMATES Willis and McElwain 2002 (~ 380 MYA)

  16. FOSSIL CUTICLE (Fossil) (Modern) (Silurian: 430 MYA) http://www.ucmp.berkeley.edu/IB181/VPL/Pres/PresVG.html

  17. FOSSIL ROOTS (408 MYA – Early Devonian)

  18. FOSSIL DISPERSAL UNITS (450 –430 MYA Late Ordovician – Early Silurian)

  19. “SPORANGIA” or “GAMETANGIA” Cooksonia (428 MYA – Silurian)

  20. Life Cycles Haplontic Alternation of Generations

  21. First Plant: Cooksonia (428 MYA – Silurian)

  22. Cooksonia (428 MYA – Silurian) Deposits in Ireland and Elsewhere

  23. Cooksonia (A Few)

  24. Aglaophyton major(= Rhynia major) (400 MYA – Early Devonian) (Rhynie Chert – Scotland)

  25. Aglaophyton major(= Rhynia major)

  26. Aglaophyton major(= Rhynia major) “Rhizomes/Rhizoids”

  27. Aglaophyton major(= Rhynia major) (400 MYA – Early Devonian) (Rhynie Chert – Scotland)

  28. Rhynia gwynne-vaughnii (400 MYA – Early Devonian) (Rhynie Chert – Scotland)

  29. Next Time: Bryophytes

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