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Doug - Cal State LA - Instructional Web Server
Doug - Cal State LA - Instructional Web Server

... to other professionals, but could not explain how continents drifted Try to put together Wegner’s Pangea ...
5 Cenozoic Geology n
5 Cenozoic Geology n

... The Interior Lowlands • Sediments eroded from the Laramide highlands were deposited in the Cannonball Sea Early Paleocene south to North Dakota. – Terrestrial deposits are also found, but much of this area was experiencing erosion – Igneous activity was significant in some areas - New Mexico, Color ...
Sea Floor Mapping Lesson Plan Part 2
Sea Floor Mapping Lesson Plan Part 2

...  Lithospheric plates on the scales of continents and oceans constantly move at rates of centimeters per year in response to movements in the mantle. Major geological events, such as earthquakes, volcanic eruptions, and mountain building, result from these plate motions. ...
Zheng-Xiang Li - ScienceWatch.com
Zheng-Xiang Li - ScienceWatch.com

... Would you summarize the significance of your paper in layman's terms? The global configuration of continents and oceans changes all the time in Earth's history. In particular, continents sometimes collide together to form a single continent—a supercontinent—and breakup later due to the Earth's inter ...
Click www.ondix.com to visit our student-to
Click www.ondix.com to visit our student-to

... fractured plate pieces travel in the same direction as the original plate was traveling -away from the ocean ridge. During the early 1900's, a theory of a 'super-continent' was developed by Alfred Wegener. He was ridiculed for his ideas that continental drift produced the present positions of the c ...
Word format
Word format

... A. (1) Pangea (2) Laurasia (3) Gondwana B. (1) Pangea (2) Gondwana (3) Laurasia C. (1) Pangea (2) Gondwana (3) Eurasia D. (1) Gondwana (2) Laurasia (3) Pangea E. (1) Gondwana (2) Pangea (3) Laurasia 18. Which of the following is good evidence that South America and Africa were once joined together? ...
Plate Tectonics
Plate Tectonics

... “The mid-oceanic ridges rise 3000 meters from the ocean floor and are more than 2000 kilometers wide surpassing the Himalayas in size. The mapping of the seafloor also revealed that these huge underwater mountain ranges have a deep trench which bisects the length of the ridges and in places is more ...
Plate Tectonics
Plate Tectonics

... • Fossils found in Antarctic soil indicate that the now frigid continent was once lush with trees and ferns, and home to dinosaurs, amphibians, and later, marsupials. ...
Chapter 4
Chapter 4

... 16. Chemical weathering – weathering caused by chemicals breaking down rocks 17. Erosion – process which weathered rock is moved from one place to another 18. Glacier- a large mass of slowly flowing ice 19. Deposition –process by which eroded materials are dropped off in another place 20. Meander – ...
Discovering Plate Tectonics PDF Name
Discovering Plate Tectonics PDF Name

... 19. What are the different types of plate boundaries? ____________________________________________________________________________________________ ____________________________________________________________________________________________ 20. Why are divergent boundaries called constructive boundar ...
Plate Tectonics - My Teacher Pages
Plate Tectonics - My Teacher Pages

... If new crust is being formed all the time why isn’t the earth covered in crust?  Because as new crust is formed old crust is ...
File
File

...  Wegener’s theory of continental drift was not accepted until after his death in 1930 – be able to explain why his theory was not accepted until AFTER his death  Wegener believed that all continents were once connected as one large landmass that broke apart 200 million years ago: Pangaea  Seven c ...
Key concepts
Key concepts

... -know how pressure and temperature change as you move through the layers of the earth and their effects on the behavior of rocks -know the internal source of heat inside the earth and how heat moves by conduction or convection -know how old the earth is -be able to describe Wegener’s theory of conti ...
No Slide Title
No Slide Title

... By studying the iron in the rocks of the ocean floor scientists found that this unusual phenomenon was happening ...
FREE Sample Here
FREE Sample Here

... Earth’s initial atmosphere was composed of hydrogen and a small amount of helium. The atmosphere was outgassed from Earth’s interior, and it was replaced by the release of gases from the mantle by outgassing through volcanic activity to form an early atmosphere. These gases included water vapor, car ...
Poor Wegener - Issaquah Connect
Poor Wegener - Issaquah Connect

... Wegener’s continental drift idea wasn’t accepted. ...
Chapter 22.4: Plate Tectonics
Chapter 22.4: Plate Tectonics

... Continental Drift: Supporting Evidence 1. Continents seem to fit together like puzzle pieces 2. Fossil records show similar plant and animal fossils on continents separated by oceans … suggesting that continents were once one land mass (mesosaur; lystrosaur) on different continents ...
the dynamic crust - Discover Earth Science
the dynamic crust - Discover Earth Science

... a. this suggests that all the continents were one, plant and animal life flourished all over it and that fossils of these species were carried with the continents as they drifted apart b. large deposits of coal (a fossil fuel formed from plant remains) are found in Antarctica show that it had a much ...
Geology-Sheet-3-Carboniferous-Period
Geology-Sheet-3-Carboniferous-Period

... about 12°C today. Later during the Carboniferous, global temperatures cooled to levels similar to today, and there was a great ice age. The composition of the atmosphere was different during the Carboniferous - oxygen (O2) levels were actually much higher 35%, compared with 20% today. Lastly, animal ...
Plate Tectonics
Plate Tectonics

... This gave evidence to the theory of seafloor spreading that was suggested by a Princeton University scientist, Harry Hess. Hess was on a Navy vessel in WW II, mapping the ocean floor with a fathometer - a type of sonar that used echo sounding to help ships know where the bottom of the ocean floor wa ...
The Diversity of Life MODIFIED
The Diversity of Life MODIFIED

... Q. What is Continental Drift? A. Theory that continents were once attached (as Pangea) and have moved away from each other. (Wegener) ...
The Oldest Crust in Ocean Basins
The Oldest Crust in Ocean Basins

... Scientists have been studying this area, in water depths of more than 6000m, through ocean drilling for more than three decades. The most recent penetration of the approximately 170 million-yearold crust by ODP occurred on Leg 185 as part of the "Subduction Factory Experiment". ...
Tectonic change 1 Powerpoint presentation
Tectonic change 1 Powerpoint presentation

... Life started very early on in the Earth's history, although did not progress beyond simple single celled organisms for most of its history. It is likely that it thrived in pools of water near hydrothermal springs. The oldest `fossils' found date from 3550 million years ago in rocks from Western Aust ...
Dynamic Earth
Dynamic Earth

... When rocks cool at the Earth’s surface, they record Earth’s magnetic field (normal or reverse polarity) ...
ch10
ch10

... reduced the area of shallow epeiric seas. Adding to the crisis, sea level dropped roughly 100 meters during the last 2 million years of the Permian Period. Large continental fissure eruptions in Siberia and China may have blocked sunlight from reaching the Earth or added CO2 and water vapor to the a ...
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Geological history of Earth



The geological history of Earth follows the major events in Earth's past based on the geologic time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System.Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as the result of a Mars-sized object with about 10% of the Earth's mass impacting the planet in a glancing blow. Some of this object's mass merged with the Earth, significantly altering its internal composition, and a portion was ejected into space. Some of the material survived to form an orbiting moon. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor, augmented by ice delivered from comets, produced the oceans.As the surface continually reshaped itself over hundreds of millions of years, continents formed and broke apart. They migrated across the surface, occasionally combining to form a supercontinent. Roughly 750 million years ago, the earliest-known supercontinent Rodinia, began to break apart. The continents later recombined to form Pannotia, 600 to 540 million years ago, then finally Pangaea, which broke apart 180 million years ago.The present pattern of ice ages began about 40 million years ago, then intensified at the end of the Pliocene. The polar regions have since undergone repeated cycles of glaciation and thaw, repeating every 40,000–100,000 years. The last glacial period of the current ice age ended about 10,000 years ago.
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