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109_05_pt_I_key

109_05_pt_I_key - most nearly d Last known saurischians...

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Key Quaternary Neogene Cretaceous Jurassic Triassic Permian Devonian Silurian Ordovician Cambrian Age (Ma) Era Period 200 Paleogene 100 0 Age (Ga) Eon 0 1 3 2 4 300 Missis- sippian Pennsyl- vanian pre-Hadean 1 Ma = 1 million years 1 Ga = 1 billion years 13,700 4570 4000 2500 543 505 405 285 251 202 144 65 0 0 543 EAS 109 MIDTERM KEY (Please check off which day this is — 1 point ) Part I . Please answer your choice of seven of the following, indicating the appropriate time or time interval as exactly as possible using the boldface numbers 0-13,700 on the time scale, as in the example below. (14 points, two for each, one for each endpoint of a pair). Ample allowance will will be given where close calls are a possibility. No indications to the contrary, the first seven you answer will be the ones counted — and no, 0-13,700 ordinarily won’t do.) x. Mesozoic Era: from_____to______ a. Earliest known evidence of life most nearly ______ b. Earliest known jawed vertebrates most nearly ______ c. Earliest known terrestrial vertebrates
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Unformatted text preview: most nearly ______ d. Last known saurischians very nearly ______ e. Last known ornithischians very nearly ______ f. The Chicxulub impact crater, Yucatan, Mexico very nearly ______ g. The “Big Bang” very nearly ______ h. Last known theropods most nearly ______ i. Earliest known saurischians from_____to______ j. Earliest known ornithischians from_____to______----------------------------------- Limit for Tuesday (a–j) ---- ----k. Earliest known forests from_____to______ l. Most phyla that are known from fossils are first known in the fossil record from_____to______---------------------------------- Limit for Thursday (a–l) ---- ----m. Earliest known invertebrate chordates from_____to______ n. Earliest known terrestrial herbivorous vertebrates from_____to______ 251 65 4000 405 358 65 65 13,700 251 202 251 202 405 358 543 505 543 505 285 358 358...
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  • Fall '07
  • CISNE
  • Cretaceous–Tertiary extinction event, Chicxulub Crater, Earliest known saurischians, Earliest known forests, Neogene Paleogene, Earliest known ornithischians

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