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Geologic Time Scale!

QuestionAnswer
Geologic Time Scale Timeline that organizes the events in Earth's history.
Cambrian boundary (550 million years ago) when the variety of life forms explodes
Fossils are the imprints of remains of ogranisms that were once alive.
Cenozoic Era 65million yrs-present includes Quaternary and Tertiary periods
Mesozoic Era 245-65 millions of years ago. Includes Cretaceous, Jurassic, Triassic periods
Geologic Time Scale Timeline that organizes the events in Earth's history.
Cambrian boundary (550 million years ago) when the variety of life forms explodes
Fossils are the imprints of remains of ogranisms that were once alive.
Cenozoic Era 65million yrs-present includes Quaternary and Tertiary periods
Mesozoic Era 245-65 millions of years ago. Includes Cretaceous, Jurassic, Triassic periods
Geologic Time Scale Timeline that organizes the events in Earth's history.
Geologic Time Scale Timeline that organizes the events in Earth's history.
Cambrian boundary (550 million years ago) when the variety of life forms explodes
Archaean Era 3800-2500 millions of years ago
Cenozoic Era 65million yrs-present includes Quaternary and Tertiary periods
Hadean Era 4500-3800 millions
Mesozoic Era 245-65 millions of years ago. Includes Cretaceous, Jurassic, Triassic periods
Fossils are the imprints of remains of ogranisms that were once alive.
Carboniferous Period 360-286 millions of years ago. First reptiles
Paleozoic Era 245-544 millions of years ago. Includes Permain, Carboniferous, Devonian, Silurian, Ordovician, Cambrian periods
Cenozoic Era 65million yrs-present includes Quaternary and Tertiary periods
Mesozoic Era 245-65 millions of years ago. Includes Cretaceous, Jurassic, Triassic periods
Jurassic Period 208-146 millions of years ago. Birds
Porterozoic Era 2500-544 millions of years ago
Paleozoic Era 245-544 millions of years ago. Includes Permain, Carboniferous, Devonian, Silurian, Ordovician, Cambrian periods
Triassic Period 245-208 millions of years ago. First dinosuars/mammals
Ordovician Period 505-440 millions of years ago. First fish
Porterozoic Era 2500-544 millions of years ago
Permian Period 286-245 millions of years ago.
Cambrian Period 544-505 millions of years ago. Explosion of life-forms
Archaean Era 3800-2500 millions of years ago
Carboniferous Period 360-286 millions of years ago. First reptiles
Hadean Era 4500-3800 millions
Devonian Period 410-360 millions of years ago. First amphibians
Quaternary Period 1.8 million-present. Includes Holocene and Pleistocene Epoch.
Silurian Period 440-410 millions of years ago. first insects
Tertiary Period 38-1.8 million of years ago. Includes Pliocene, Miocene, Oligocene, Eocene, Paleocene epoch. Rise of mammals.
Ordovician Period 505-440 millions of years ago. First fish
Cretaceous Period 146-65 millions of years ago. Flowering plants.
Jurassic Period 208-146 millions of years ago. Birds
Jurassic Period 208-146 millions of years ago. Birds
Triassic Period 245-208 millions of years ago. First dinosuars/mammals
Triassic Period 245-208 millions of years ago. First dinosuars/mammals
Permian Period 286-245 millions of years ago.
Permian Period 286-245 millions of years ago.
Carboniferous Period 360-286 millions of years ago. First reptiles
Carboniferous Period 360-286 millions of years ago. First reptiles
Devonian Period 410-360 millions of years ago. First amphibians
Devonian Period 410-360 millions of years ago. First amphibians
Silurian Period 440-410 millions of years ago. first insects
Silurian Period 440-410 millions of years ago. first insects
Ordovician Period 505-440 millions of years ago. First fish
Ordovician Period 505-440 millions of years ago. First fish
Cambrian Period 544-505 millions of years ago. Explosion of life-forms
Cambrian Period 544-505 millions of years ago. Explosion of life-forms
Molds and casts Acids eat away the skeleton or shell and leave an impression (mold) in the rock. If the mold fills with minerals, it becomes a cast.
Tracks and trails Imprints are left in the mud, which later hardens. Dinosuar tracks are fairly common
Carbonization Oils leave the plant, and the remaining metter becomes a layer of carbon; in other cases, nitrogen, hydrogen, and oxygen are distilled from the plant. Most common method of fossilizing plants.
Petrifaction Minerals in plant cells crystallize; minerals enter openings or cavities in shells or bones. Common with plants.
Replacement Object buried in mud has molecules replaced by minerals. Rare.
Recrystallization Mineral aragonite in shells turns into calcite. Preserves the general shape of the animal.
Soft tissue preservation Mummification, frozen in ice. Fossils are relatively young and do not last long.
Traps Whole organisms locked in tar pits, asphalt, amber, etc.
Carbon Dating is a variety of radioactive dating which is applicable only to matter which was once living and presumed to be in equilibrium with the atmosphere, taking in carbon dioxide from the air for photosynthesis.
Holocene Epoch 11,000yr-present, Humans.
Pleistocene Epoch 1.8-11,000yr
Pliocene Epoch 5-1.8 millions of years ago.
Miocene Epoch 23-5 millions of years ago.
Oligocene Epoch 38-23 millions of years ago.
Eocene Epoch 54-38 millions of years ago.
Paleocene Epoch 65-54 millions ofyears ago. Rise of mammals.
Ria is officially done. Meaning, she is HAPPY! (:
Created by: rme99
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