Plate tectonics.notebook
... Describe Wegener's hypothesis of continental drift. Explain how seefloor spreading provides a way for continents to move. Describe how new oceanic lithosphere forms at midocean ridges. Explain how magnetic reversals provide evidence for seafloor spreading. Continental Drift Wegener’s theory of ...
... Describe Wegener's hypothesis of continental drift. Explain how seefloor spreading provides a way for continents to move. Describe how new oceanic lithosphere forms at midocean ridges. Explain how magnetic reversals provide evidence for seafloor spreading. Continental Drift Wegener’s theory of ...
THE OCEAN FLOOR
... Seamounts- Submerged volcanic peaks that dot the ocean floor The majority of seamounts are found in the Pacific Ocean. They are mainly volcanoes that have not reached the surface Guyots - are once-active, now-submerged, flat-topped structures. Mid-Ocean ridges ...
... Seamounts- Submerged volcanic peaks that dot the ocean floor The majority of seamounts are found in the Pacific Ocean. They are mainly volcanoes that have not reached the surface Guyots - are once-active, now-submerged, flat-topped structures. Mid-Ocean ridges ...
Plate tectonics
... Have the continents moved? Alfred Wegener was a key figure in changing ideas about the Earth’s surface. In 1912, he proposed that all the continents were once joined in a single supercontinent, called Pangaea. Wegener suggested that Pangaea began to break up about 200 million years ago and the piec ...
... Have the continents moved? Alfred Wegener was a key figure in changing ideas about the Earth’s surface. In 1912, he proposed that all the continents were once joined in a single supercontinent, called Pangaea. Wegener suggested that Pangaea began to break up about 200 million years ago and the piec ...
Lesson 1 Notes
... mountains that were similar in age and structure on both sides of the Atlantic Ocean - the Appalachians in the eastern United States and Canada, and similar mountains in the northern British Isles and Europe. These mountains formed about 300 million years ago when North America collided with Europe ...
... mountains that were similar in age and structure on both sides of the Atlantic Ocean - the Appalachians in the eastern United States and Canada, and similar mountains in the northern British Isles and Europe. These mountains formed about 300 million years ago when North America collided with Europe ...
Newid tectoneg 1
... 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 ...
... 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 ...
Key topics today: How do we know about the Earth`s interior structure?
... – Evidence for continental drift and seafloor spreading – The basic theory – Relate to marine geologic patterns and phenomena (e.g. earthquakes, volcanoes) – Plate motion ...
... – Evidence for continental drift and seafloor spreading – The basic theory – Relate to marine geologic patterns and phenomena (e.g. earthquakes, volcanoes) – Plate motion ...
Earth Structure
... When rocks cool at the Earth’s surface, they record Earth’s magnetic field (normal or reverse polarity) ...
... When rocks cool at the Earth’s surface, they record Earth’s magnetic field (normal or reverse polarity) ...
Earth Structure and Plates
... When rocks cool at the Earth’s surface, they record Earth’s magnetic field (normal or reverse polarity) ...
... When rocks cool at the Earth’s surface, they record Earth’s magnetic field (normal or reverse polarity) ...
Paleozoic, Late Silurian Period, 420 Million Years Ago
... The illustration shows a group of near-complete Silurian crinoids and the remains of their stems as you might see them in the Elora Gorge, at Rockwood or near Cambridge. The Silurian is the third period of the Paleozoic. The Silurian Period is named from rocks in South Wales in the tribal area of th ...
... The illustration shows a group of near-complete Silurian crinoids and the remains of their stems as you might see them in the Elora Gorge, at Rockwood or near Cambridge. The Silurian is the third period of the Paleozoic. The Silurian Period is named from rocks in South Wales in the tribal area of th ...
CHAPTER 13 THE OCEAN FLOOR
... ii. Abyssal Plains: The most level places on Earth. The abyssal plains may have less than 3 m of relief over a distance that may exceed 1300 km. Scientists determined that abyssal plains low relief is due to the fact that thick accumulations of sediment, transported by turbidity currents, have buri ...
... ii. Abyssal Plains: The most level places on Earth. The abyssal plains may have less than 3 m of relief over a distance that may exceed 1300 km. Scientists determined that abyssal plains low relief is due to the fact that thick accumulations of sediment, transported by turbidity currents, have buri ...
Final S2 ES Option one
... Summarize the limitations of using the rates of erosion and deposition to determine the absolute age of rock formations. Explain how the process of radioactive decay can be used to determine the absolute age of rocks. Describe four ways in which entire organisms can be preserved as fossils. List fiv ...
... Summarize the limitations of using the rates of erosion and deposition to determine the absolute age of rock formations. Explain how the process of radioactive decay can be used to determine the absolute age of rocks. Describe four ways in which entire organisms can be preserved as fossils. List fiv ...
CHAPTER 2 - earthjay science
... reflected during this interglacial and sea level high stand; during extreme low sea levels more continent would be exposed and albedo higher (thus lower global temperatures); 8o C drop per 1% change b. cloud-ash-dust absorption of solar energy c. greenhouse gas content (especially CO2); decrease CO2 ...
... reflected during this interglacial and sea level high stand; during extreme low sea levels more continent would be exposed and albedo higher (thus lower global temperatures); 8o C drop per 1% change b. cloud-ash-dust absorption of solar energy c. greenhouse gas content (especially CO2); decrease CO2 ...
Cracking Up
... An ocean will one day fill the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The ...
... An ocean will one day fill the Great Rift Valley, where Africa is pulling apart. Recently, that tectonic activity has gotten dramatic. In 2005, the cracking of the African Plate triggered a volcanic eruption in Ethiopia. That was followed by a series of earthquakes—the same ones the nomads felt. The ...
Chapter 1: Geologic History of the Southeastern US:
... when sediment is subjected to intense heat and pressure, provide important clues about past mountain-building events, and geologists often use them to map the extent of now-vanished mountain ranges. Sedimentary rocks tell perhaps the most comprehensive story of the Earth's history, as they record ch ...
... when sediment is subjected to intense heat and pressure, provide important clues about past mountain-building events, and geologists often use them to map the extent of now-vanished mountain ranges. Sedimentary rocks tell perhaps the most comprehensive story of the Earth's history, as they record ch ...
Chapter 9
... Around 570 million years ago, rifting began again, and South America began to separate from North America, forming the Iapetus Ocean (or proto-Atlantic Ocean). The rift ran along what is now the Blue Ridge province. Basaltic lava flows formed the Catoctin Formation. As the Iapetus Ocean opened, sand ...
... Around 570 million years ago, rifting began again, and South America began to separate from North America, forming the Iapetus Ocean (or proto-Atlantic Ocean). The rift ran along what is now the Blue Ridge province. Basaltic lava flows formed the Catoctin Formation. As the Iapetus Ocean opened, sand ...
Plate Tectonics _2010
... Mid-ocean Ridges are places where NEW rock is forming. These rocks contain magnetic minerals (minerals with iron) they point to the north pole The north pole can flip with the south pole These minerals flip too. This is called a magnetic reversal. ...
... Mid-ocean Ridges are places where NEW rock is forming. These rocks contain magnetic minerals (minerals with iron) they point to the north pole The north pole can flip with the south pole These minerals flip too. This is called a magnetic reversal. ...
Mid-Ocean Ridge
... Answer the following in complete sentences: In what state of matter does the inner core exist? What ocean has the greatest average depth? What hemisphere contains the greatest percentage of ocean water? What term from yesterday’s earth picture does this ...
... Answer the following in complete sentences: In what state of matter does the inner core exist? What ocean has the greatest average depth? What hemisphere contains the greatest percentage of ocean water? What term from yesterday’s earth picture does this ...
Plate Tectonic Theory
... • hot magma moves slowly upward, cooler magma near surface moves slowly downward forming convection currents within the asthenosphere • Rising convection currents diverge where they approach the surface pulling on the plate above it creating a divergent plate boundary • two sides move away in opposi ...
... • hot magma moves slowly upward, cooler magma near surface moves slowly downward forming convection currents within the asthenosphere • Rising convection currents diverge where they approach the surface pulling on the plate above it creating a divergent plate boundary • two sides move away in opposi ...
Quiz 1 (Key)
... formation of mid-oceanic ridges; c) involve the formation of new continental crust; d) are also called passive margins; e) are also called transform boundaries. 6. What is the longest running mountain chain on earth: a) the Andes; b) the Himalayas; c) the Mid-Oceanic ridges; d) the Rockies; e) the A ...
... formation of mid-oceanic ridges; c) involve the formation of new continental crust; d) are also called passive margins; e) are also called transform boundaries. 6. What is the longest running mountain chain on earth: a) the Andes; b) the Himalayas; c) the Mid-Oceanic ridges; d) the Rockies; e) the A ...
Continental Drift - Imaginique Bengals
... Glacial till of the same age is found in southern Africa, South America, India and Australia — areas that it would be very difficult to explain the occurrence of glaciation. At the same time, large coal deposits were formed from tropical swamps in N. America and Europe. Pangaea with S. Africa center ...
... Glacial till of the same age is found in southern Africa, South America, India and Australia — areas that it would be very difficult to explain the occurrence of glaciation. At the same time, large coal deposits were formed from tropical swamps in N. America and Europe. Pangaea with S. Africa center ...
Sea Floor Spreading The Mid-ocean Ridge
... away Moves like a conveyor belt from the ridge. carrying continents with it. ...
... away Moves like a conveyor belt from the ridge. carrying continents with it. ...
Study outline for Oceanography
... 7. Compare and contrast Protoearth, and early Earth with modern Earth. 8. Describe density stratification in Earth and the resultant chemical structure. Be able to rouighly characterize the crust, mantle, and inner and outer core with respect to density and composition. 9. Describe the physical stru ...
... 7. Compare and contrast Protoearth, and early Earth with modern Earth. 8. Describe density stratification in Earth and the resultant chemical structure. Be able to rouighly characterize the crust, mantle, and inner and outer core with respect to density and composition. 9. Describe the physical stru ...
restless continents text
... Mesosaurus, a small, aquatic reptile, and Glossopteris, an ancient plant species, have been found on several continents. How did fossils provide evidence for Wegener’s hypothesis of continental drift? ...
... Mesosaurus, a small, aquatic reptile, and Glossopteris, an ancient plant species, have been found on several continents. How did fossils provide evidence for Wegener’s hypothesis of continental drift? ...
7 The coastline and the Tasman Sea
... thick continental crust being split and a new ocean progressively formed each side of a volcanically active mid-ocean ridge - a process that is underway today in the Red Sea and the Great Rift Valley of Africa. The separated continental pieces rafted away to each side of the widening rift with a new ...
... thick continental crust being split and a new ocean progressively formed each side of a volcanically active mid-ocean ridge - a process that is underway today in the Red Sea and the Great Rift Valley of Africa. The separated continental pieces rafted away to each side of the widening rift with a new ...
CRCT Review - Chapter 7 Plate Tectonics.
... _____ 10. What hypothesis by Alfred Wegener explains why continents seem to fit together? a. continental spreading c. Wegener’s puzzle b. plate tectonics d. continental drift _____ 11. What did Wegener hypothesize happened to the continents? a. They broke up and re-formed. b. They drifted together t ...
... _____ 10. What hypothesis by Alfred Wegener explains why continents seem to fit together? a. continental spreading c. Wegener’s puzzle b. plate tectonics d. continental drift _____ 11. What did Wegener hypothesize happened to the continents? a. They broke up and re-formed. b. They drifted together t ...
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.