ERTH 2401 Lecture Notes - Lecture 8: Vertebra, Solnhofen Limestone, Andesite
15 Oct 2018
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Document Summary
Earth history is over 4 billion years. Time scale for the last 610 million years: precambrian, 610-550: vendian, paleozoic, 550-510: cambrian, 510-440: ordovician, 440-408: silurian, 408-360: devonian, 360-290: carboniferous, 290-250: permian, mesozoic, 250-208: triassic, 208-145: jurassic, 145-65: cretaceous, cenozoic, 65-2 million: tertiary. Dinosaurs existed during the mesozoic era; triassic, jurassic and cretaceous. If both ice caps melted, the sea levels would rise 70m. Late proterozoic (600 mya): continents connected in the form of a u, no land mass over north pole, 1 ice cap located in the south pole. Early cambrian (560 mya): no ice cap at south pole, continental break-up, moving in northern direction. Early ordovician (500 mya): continents are moving further up, high sea levels, continentns are flooding. Late (450): contnants over the paleo equator. Silurian (430): sea level is rising, continental mass under shallow seas, (cid:862)water pla(cid:374)et(cid:863) first reef systems in the shallow seas, monitoun island, where the earliest reef was discovered.
