GEOL 103 Lecture 14: 5:16:18 7.2 GEOL 103 (1)
30 May 2018
School
Department
Course
Professor
1
GEOL 103
Spring 2018 AEC Notes
Prof. Davis
5/14/18 (Week 7, Class #14) Wednesday
● Office Hours:
○ 214 Volcanology TW 12-1PM or by appointment
Mesozoic
● Permian-- 90% went extinct
● Triassic Survivors
○ Ammonite (squigly dividers to prevent crushing) (major predator,
eventually go extinct)
○ Coral
● Permian is like our current diversity crisis
○ All coral went extinct from paleozoic
○ World was OK without reefs, but ocean will look very different
(like it was in the triassic)
○ CORAL GAP!
● Marine Reptiles (vertebrates)
○ Natural selection doesn’t have a goal
○ Placodonts move back into the ocean (similar to sea turtles
without shell
find more resources at oneclass.com
find more resources at oneclass.com
2
○ Nothosaur
● Triassic Plants
○ Right after the extinction, there is a massive fern spike (lots of
ferns, not good at competing with seed plants long term, but are
able to reproduce quickly (after seed plants are wiped out))
○ Complication and diversification of gymnosperms-- ginkgo
■ fruit= seed
● Triassic Land Animals
○ Early Dinosaurs (don’t really get crazy! Until the jurassic)
○ Similar, basic body plan (walk on 2 legs= primitive (unlike
mammals (who go from 4 legs to 2))
○ Pangolin
○ Dinosaurs start out BIpedal and some of them become
quadrupedal
● iClicker: Which kind of land plant first evolved in the Triassic?
○ Ginkgo (Ferns already existed in
Paleozoic-- appear first, but don’t evolve in)
Jurassic
● Oceans
○ ** Switch to more modern ocean (from paleozoic)
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
214 volcanology tw 12-1pm or by appointment. Ammonite (squigly dividers to prevent crushing) (major predator, eventually go extinct) Permian is like our current diversity crisis. World was ok without reefs, but ocean will look very different (like it was in the triassic) Placodonts move back into the ocean (similar to sea turtles without shell. Right after the extinction, there is a massive fern spike (lots of ferns, not good at competing with seed plants long term, but are able to reproduce quickly (after seed plants are wiped out)) Similar, basic body plan (walk on 2 legs= primitive (unlike mammals (who go from 4 legs to 2)) Dinosaurs start out bipedal and some of them become quadrupedal. ** switch to more modern ocean (from paleozoic) Side to side tail movement (dolphins have vertical) Some species from paleozoic stick around, less dominant. Marine reptiles from triassic didn"t make it to jurassic! 1 directional breathing, air sacks (able to lose heat)
