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Rocks & Geo Time

QuestionAnswer
Three types of rocks are... Sedimentary, Metamorphic and Igneous
2 characteristics of Sedimentary rock Fossils & sand or pebbles
2 characteristics of Metamorphic rock Crystals & Ribbon layers
2 characteristics of Igneous rock Gas bubbles & Glassy surface
Cambrian (biological) Invertebrates formed and Branchiopods and trilobites formed
Ordovician (biological) Jawless fish and vertebrates formed
Ordovician (geological) Ice cap covers North America
Silurian (biological) Coral reefs, fish with jaws, spiders and insects and land plants appear
Devonian (biological) Sharks formed; lungfish and amphibians inhabited land
Carboniferous (geological) Appalachian mountains formed; Deserts expanded; Ice covered South Pole
Carboniferous (biological) Small reptiles and insects formed; Mass extinction
Permian (biological) Warm-blooded reptiles formed
Triassic (geological) Pangea stays together; hot and dry weather
Triassic (biological) Dinosaurs and small mammals appear
Jurassic (geological) Pangea breaks apart
Jurassic (biological) Birds appear
Cretaceous (geological) Widespread volcanic activity
Cretaceous (biological) Snakes appear; Mass extinction
Tertiary (geological) Rocky Mountains and Himalayans formed
Tertiary (biological) Ancestors of humans evolve
Quaternary (geological) Climate cooled; Ice ages
Quaternary (biological) Homo sapiens formed
Created by: 100003064392868
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