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dnsr notes 22

The Jurassic World

QuestionAnswer
What percentage of species in the ocean disappeared from the end-Triassic extinction? 50% and over
Which of the non-dinosaurian archosaurs lived through this extinction? Crocodyliforms
What does CAMP stand for and what happened there? Central Atlantic Magmatic Province. Flood lavas happened.
What was Pangaea doing during the Jurassic period? Pangaea began to break apart leading up to the fragmented continents we see in the cretaceous and today.
What helped Pangaea break up? extensive rifting and volcanism
The complex nature of the movements of continental plates resulted in periodic flooding of lower parts of the continents with shallow ----. (Shallow sea) Epieric Seas
What times in the Jurassic were covered with sand seas? What were these sand seas called? Early and middle Jurassic. Ergs (Large sand dune)
What stones came out of these ergs? Wingate, Navajo, and Entrada sandstones.
What happened to the ergs? They were covered by shallow oceans
Most of western North America was covered with broad semi-arid riverplain that produced sediments of what formation? The Late Jurassic Morrison Formation
What happened to the climate as Pangaea fragmented? The large bodies from rising sea levels of water helped regulate temperature
What caused rising sea levels? The absence of polar ice caps and glaciers
Which continents were flooded? North America, Europe, and North Africa
During the middle and late Jurassic, how was the climate? Warm, equable though semi-arid climates. Not a lot of strong seasonality and temperatures due to the high sea levels.
What plants were in the Triassic? cycads, conifers, and ginkgoes. Ferns were abundant and to a lesser extant, seed-ferns
What type of plant dominated? Gymnosperms including conifers, club mosses, moss, cycadophytes
What happened to herbivorous dinosaurs after the Triassic extinction? They diversified and some reached gigantic size
What happened to carnivorous dinosaurs? Diversify and some grow quite large
What "bit players" did the Jurassic ecosystem consist of? insects, frogs, salamanders, turtles, lizards, snakes, crocodiles, small mammals.
What insects lived in the Jurassic? Leafhoppers, sawflies, plant bugs, and butterflies
During the Jurassic, what happened to pterosaurs? What are the groups? They greatly diversified into two different types. Rhamphorhyncoids, which have a long tail, and pterodactyloids, which have a short tail.
When did Archaeopteryx appear? Late Jurassic
What developed in shallow, warm seas? Coral reefs which marine ecosystems were based off of.
What kind of animals lived in the coral reef? bony fish and ammonites
Which theropods lived in the Jurassic? Ceratosaurs, allosaurs, and coelurosaurs
Who were the "megaherbivores"? Sauropods and they were the dominant primary consumer
When did true sauropods appear? Early Jurassic
Which dinosaur groups started to appear in the Jurassic? Thyreophorans and eventually the first stegosaurs and anklyosaurs.
Which ornithiscian species were successful during the Late Jurassic? Ornithopods such as camptosaurus, dryosaurus and othnellia
What did sauropods develop to still digest plants that held chemicals? gastric mill (elongate gastrointestinal track, including a large stomach in the front, and a vast intestine in the rear. Long digestion times and large bodies may have helped.
Which herbivores lived during the Jurassic? Large: some sauropods (brachiosaurus camarasaurus) - high browsers Medium: ornithopods (Camptosaurus, Othnellia) Stegosaurs (Stegosaurus)
Which carnivores lived during the Jurassic? Theropods (Allosaurus, ceratosaurus, and torvosaurus Medium and small: small theropods (marshosaurus, stokesosaurus, Ornitholestes) crocs, lizards, snakes
Which animals during the Jurassic consumed insects, or were insectivores? Ground: Snakes, lizards, frogs, amphibians, turtles, small theropods, mammals In Air: Pterosaurs, birds
Which animals ate fish, or were piscivores? Ammonites, pterosaurs, birds, turtles, crocs, dinosaurs, sharks, ichthyosaurs, and plesiosaurs
Created by: Chelseagirl2508
 

 



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