GEOL 007 Lecture 4: Lecture 7 Rocks & their features

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31 Jan 2019
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Order Ornithischians
Lacked teeth in front of mouth
Herbivorous
Range of shape and sizes
Subdivided into 5 distinct sub-orders
Sub-orders
Anklyosauria
“Fused lizard”
Strong rigid body
Clubbed tails
Jurassic to Cretaceous
Ceratopsians
Beaks with grinding teeth toward back of mouth
Most had bony frills/horns
Jurassic to Late Cretaceous
Pachycephalosaurs
“Bone-head” — thick skull
Late Cretaceous
Ornithopods
Well-developed forearms
Diverse, mostly bipedal
Ex. Edmontosaurus
Stegosauria
Related to Ankylosaurs
Quadrupedal
Tiny little walnut brains
Thagomizer spiked tail
* * Theropods * *
Largest dinosaur ever may be the Amphicoelias fragillimus, might be a diplodocus though
Order Saurischia
Sauropods
Largest vertebrates ever to walk the planet
Long necks and tails
Evolved from bipedal ancestors
Migratory lifestyle
Diplodocus
Over 100 ft long
Tail used as a whip
Late Triassic to Cretaceous
Apatosaurus
Aka “brontosaurus”
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