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30 Cards in this Set
- Front
- Back
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Mesozoic “Explosion”
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Post extinction(P-Tr) exponential increase
Great deal of diverstiy |
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Marine Invertebrates
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Diverse, Coccoliths, clams, ammoniods.
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Coccoliths
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Abundant, complex design that differs between species, good index fossil
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Ammonoids
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Tiny(well cutting), widespread (all marine habitats), easily identified (suture pattern), continuous change
dominate, fish of mesozoic |
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Rudist Bivalves
-Index Fossil |
Reef building, subsurface, perect for oil/gas.
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Cycads
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Terrestrial palnt, dominates the J/Mesozoic
"Age of the Cycads" |
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Ginkgos
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Very common plant in Mesozoic
Living Dinosaur |
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Angiosperms
-comp: Gymnosperms |
95% today,"enclosed seed"
The flowering plant Gymno:need alot of pollen-wind Angio:less pollen, insects/marsupials |
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Vertebrates
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"Age of Reptiles"
Dinosaur is one type of reptile. |
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Age of Reptiles
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Tons of dry land(Pangaea) excellent for reptiles
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Dinosaurs
-Saurischia -Ornithischia |
@ orders based on pelvic bones
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-Saurischia
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Lizard Hipped
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-Ornithischia
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Bird Hipped
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“Holy” heads
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Categorized by temporal openings in their skulls
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Carnivorous
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T-Rex
Lizard Hipped,only carnivor, strong jaw muscles, serrated incisors |
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Herbivorous
-Brontosarus Apatasaurus) |
Plant Eaters
Bird Hipped |
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Archaeopteryx
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Reptilian and Birdlike features, transition fossil from reptile to bird
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Flying Reptiles
-Pterosaurs |
Laid eggs
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Marine Reptiles
-Mososaurs -Ichthyosaurs |
huge, bouyant in water, laid eggs had scales
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Mammals
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Low diversity, small size.
Outcompeted by reptiles. Earbones, jaws, teeth. |
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Ectothermic
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Cannot control body heat, scavengers
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Endothermic
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Can control body heat, predators
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Dinosaurs Warm/Cold blooded or mixed
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Unknown, Lg size heat up slow, cool down slow
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K/T Extinction
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2nd biggest extinction event
65my, affects everything (marine, terrestrial, Aerial) |
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K/T Extinction
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85% extinction
Unaffected:Snakes Turtles, Crocs, Lizards, Amphibians, birds, MAMMALS |
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Iridium-rich clay
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Loaded w/ iridium, a metal that is rare, evidence of asteroid event, settles all over Earth
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Buried Crater
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Ycatan Peninsula, evidence of buried crator very deep
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Shocked quartz
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Striations from high pressures or metorite impact
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Meteorite Impact Theory
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Ycatan Peninsula, evidence of buried crator, Iridium-rich clay, Shocked quartz
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Flood Basalts –
India -Volcanism Theory |
Massive flood balalts in India,
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