Earth History Geologic Time Geologic Time Geologic Time
![Earth History: Geologic Time Earth History: Geologic Time](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-1.jpg)
![Geologic Time • Geologic Time: It is very, very long. – Earth is estimated Geologic Time • Geologic Time: It is very, very long. – Earth is estimated](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-2.jpg)
![Divisions of Geologic Time Largest Division: Eons –Eons divided into Eras: – Pre. Cambrian, Divisions of Geologic Time Largest Division: Eons –Eons divided into Eras: – Pre. Cambrian,](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-3.jpg)
![Pre. Cambrian 543 million years ago to ~ 4 billion years ago (? ) Pre. Cambrian 543 million years ago to ~ 4 billion years ago (? )](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-4.jpg)
![First Life One celled plants (algae) entered the fossil record approximately 3 b. y. First Life One celled plants (algae) entered the fossil record approximately 3 b. y.](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-5.jpg)
![More Atmospheric Changes Through photosynthesis, O 2 was released into the atmosphere and ocean More Atmospheric Changes Through photosynthesis, O 2 was released into the atmosphere and ocean](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-6.jpg)
![Paleozoic 543 million years ago to 248 million years ago • “Age of the Paleozoic 543 million years ago to 248 million years ago • “Age of the](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-7.jpg)
![Paleozoic Organisms Paleozoic Organisms](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-8.jpg)
![Carboniferous Time In Europe the Mississippian and Pennsylvanian periods are together called the Carboniferous Carboniferous Time In Europe the Mississippian and Pennsylvanian periods are together called the Carboniferous](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-9.jpg)
![Mesozoic 248 mya- 65 mya • “Age of the Reptiles” • Life: Reptiles are Mesozoic 248 mya- 65 mya • “Age of the Reptiles” • Life: Reptiles are](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-10.jpg)
![Reptiles: Appeared in the Permian and quickly became the dominant life form. …until Dinosaurs Reptiles: Appeared in the Permian and quickly became the dominant life form. …until Dinosaurs](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-11.jpg)
![Birds Some of the dinosaurs are thought to have evolved into birds. Archaeopteryx is Birds Some of the dinosaurs are thought to have evolved into birds. Archaeopteryx is](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-12.jpg)
![Dinosaur Extinction 2. Meteorite 1. Volcanoes erupt and fill the atmosphere with CO 2 Dinosaur Extinction 2. Meteorite 1. Volcanoes erupt and fill the atmosphere with CO 2](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-13.jpg)
![Evidence of a Meteorite • Layer of Iridium in rock layers Evidence of a Meteorite • Layer of Iridium in rock layers](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-14.jpg)
![Cenozoic 65 mya- present • “Age of the Mammals” • Life: Large mammals appear, Cenozoic 65 mya- present • “Age of the Mammals” • Life: Large mammals appear,](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-15.jpg)
![Mammals first appeared in the Mesozoic as small rodents. After the dinosaurs were erased Mammals first appeared in the Mesozoic as small rodents. After the dinosaurs were erased](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-16.jpg)
![Present We live in the Holocene epoch, of the Quaternary period, of the Cenozoic Present We live in the Holocene epoch, of the Quaternary period, of the Cenozoic](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-17.jpg)
![](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-18.jpg)
- Slides: 18
![Earth History Geologic Time Earth History: Geologic Time](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-1.jpg)
Earth History: Geologic Time
![Geologic Time Geologic Time It is very very long Earth is estimated Geologic Time • Geologic Time: It is very, very long. – Earth is estimated](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-2.jpg)
Geologic Time • Geologic Time: It is very, very long. – Earth is estimated to be around 4. 6 billion years old based on the rock and fossil record. – Geologic time is broken up into sections based on major changes in Earth.
![Divisions of Geologic Time Largest Division Eons Eons divided into Eras Pre Cambrian Divisions of Geologic Time Largest Division: Eons –Eons divided into Eras: – Pre. Cambrian,](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-3.jpg)
Divisions of Geologic Time Largest Division: Eons –Eons divided into Eras: – Pre. Cambrian, Paleozoic, Mesozoic, Cenozoic » Ceno - recent » Meso - middle » Paleo - ancient » Zoic - life » Eras are divided into Periods
![Pre Cambrian 543 million years ago to 4 billion years ago Pre. Cambrian 543 million years ago to ~ 4 billion years ago (? )](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-4.jpg)
Pre. Cambrian 543 million years ago to ~ 4 billion years ago (? ) –“Age of Bacteria” • Oldest Era • Longest era because we know so little about the earth that long ago • Life: Very little life: only basic forms including bacteria, the oldest fossils ever found, seaweed, jellyfish, and worms – Photosynthesis of the seaweed added oxygen to the early atmosphere, paving the way for land life.
![First Life One celled plants algae entered the fossil record approximately 3 b y First Life One celled plants (algae) entered the fossil record approximately 3 b. y.](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-5.jpg)
First Life One celled plants (algae) entered the fossil record approximately 3 b. y. ago (Precambrian). Large colonies of this algae are called stromatolites. 5
![More Atmospheric Changes Through photosynthesis O 2 was released into the atmosphere and ocean More Atmospheric Changes Through photosynthesis, O 2 was released into the atmosphere and ocean](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-6.jpg)
More Atmospheric Changes Through photosynthesis, O 2 was released into the atmosphere and ocean allowing animals to eventually evolve. 6
![Paleozoic 543 million years ago to 248 million years ago Age of the Paleozoic 543 million years ago to 248 million years ago • “Age of the](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-7.jpg)
Paleozoic 543 million years ago to 248 million years ago • “Age of the Fish” • Explosion of life in the sea: trilobites, shellfish, Fish • Life appears on land: Ferns, Amphibians • Pangaea formed • Largest mass extinction ever at the end of the Paleozoic. 90% of species became extinct.
![Paleozoic Organisms Paleozoic Organisms](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-8.jpg)
Paleozoic Organisms
![Carboniferous Time In Europe the Mississippian and Pennsylvanian periods are together called the Carboniferous Carboniferous Time In Europe the Mississippian and Pennsylvanian periods are together called the Carboniferous](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-9.jpg)
Carboniferous Time In Europe the Mississippian and Pennsylvanian periods are together called the Carboniferous period. Vast swamps and forests from that time created the huge coal beds found throughout eastern United States. 9
![Mesozoic 248 mya 65 mya Age of the Reptiles Life Reptiles are Mesozoic 248 mya- 65 mya • “Age of the Reptiles” • Life: Reptiles are](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-10.jpg)
Mesozoic 248 mya- 65 mya • “Age of the Reptiles” • Life: Reptiles are the dominant life on land. Dinosaurs exist. Birds appear. Forests of trees appear • Pangea broke apart during this peroid. • Dinosaurs become extinct in a mass extinction at the end of the Mesozoic.
![Reptiles Appeared in the Permian and quickly became the dominant life form until Dinosaurs Reptiles: Appeared in the Permian and quickly became the dominant life form. …until Dinosaurs](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-11.jpg)
Reptiles: Appeared in the Permian and quickly became the dominant life form. …until Dinosaurs took over. They ruled the planet throughout the Mesozoic era (the “Age of Dinosaurs”). 11
![Birds Some of the dinosaurs are thought to have evolved into birds Archaeopteryx is Birds Some of the dinosaurs are thought to have evolved into birds. Archaeopteryx is](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-12.jpg)
Birds Some of the dinosaurs are thought to have evolved into birds. Archaeopteryx is the oldest fossil bird found to date. 12
![Dinosaur Extinction 2 Meteorite 1 Volcanoes erupt and fill the atmosphere with CO 2 Dinosaur Extinction 2. Meteorite 1. Volcanoes erupt and fill the atmosphere with CO 2](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-13.jpg)
Dinosaur Extinction 2. Meteorite 1. Volcanoes erupt and fill the atmosphere with CO 2 and gasses that BLOCK the sun light preventing plant life……. impact causes multiple natural disasters
![Evidence of a Meteorite Layer of Iridium in rock layers Evidence of a Meteorite • Layer of Iridium in rock layers](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-14.jpg)
Evidence of a Meteorite • Layer of Iridium in rock layers
![Cenozoic 65 mya present Age of the Mammals Life Large mammals appear Cenozoic 65 mya- present • “Age of the Mammals” • Life: Large mammals appear,](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-15.jpg)
Cenozoic 65 mya- present • “Age of the Mammals” • Life: Large mammals appear, Humans appear • Ice Ages occur and ice sheets advance
![Mammals first appeared in the Mesozoic as small rodents After the dinosaurs were erased Mammals first appeared in the Mesozoic as small rodents. After the dinosaurs were erased](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-16.jpg)
Mammals first appeared in the Mesozoic as small rodents. After the dinosaurs were erased at the end of the Mesozoic, Mammals quickly evolved to become the dominant life form. The Cenozoic is the “Age of Mammals”. 16
![Present We live in the Holocene epoch of the Quaternary period of the Cenozoic Present We live in the Holocene epoch, of the Quaternary period, of the Cenozoic](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-17.jpg)
Present We live in the Holocene epoch, of the Quaternary period, of the Cenozoic era. 17
![](https://slidetodoc.com/presentation_image_h2/91dc0827ef7cf6730361529556803632/image-18.jpg)
Geologic time graphic organizer
Compare geologic time with the geologic column.
What is earth made out of
Original horizontality definition
Pilot knob volcano
Principle of superposition
Geologic history
How is the geologic time scale organized
Geologic time calendar
Geologic time scale animals
Brainpop geologic time
Geologic time scale drawing
Geological time scale graphic organizer
Largest division of geologic time
Geologic time scale drawing
Geologic time
Geologic time
Facies
Silurian period