History of the Earth and its structure
... about 4.5 billion years ago from a cloud or clouds of dust. The dust was the remains of a huge cosmic explosion which is estimated to have occurred about 15 billion years ago. ...
... about 4.5 billion years ago from a cloud or clouds of dust. The dust was the remains of a huge cosmic explosion which is estimated to have occurred about 15 billion years ago. ...
A Brief Geologic History of the Hudson Valley
... Middle Proterozoic Eon (1,300 – 800 Ma) Proto-North America, called Laurentia, was much smaller than the present-day continent and located deep in the Southern Hemisphere. The continental crust which today underlies New York State did not exist prior to this time. The area was a shallow sea where sa ...
... Middle Proterozoic Eon (1,300 – 800 Ma) Proto-North America, called Laurentia, was much smaller than the present-day continent and located deep in the Southern Hemisphere. The continental crust which today underlies New York State did not exist prior to this time. The area was a shallow sea where sa ...
Inside Earth Chapter 1 Plate Tectonics Study Guide Notes
... study forces that make and shape planet Earth. Geologists divide forces that change the surface into two groups: 1. Constructive forces – shape the surface by building up mountains and landmasses 2. Destructive forces – slowly wear away mountains. Example: Ocean waves that wear away shorelines. Thre ...
... study forces that make and shape planet Earth. Geologists divide forces that change the surface into two groups: 1. Constructive forces – shape the surface by building up mountains and landmasses 2. Destructive forces – slowly wear away mountains. Example: Ocean waves that wear away shorelines. Thre ...
Plate Tectonics - Helena High School
... • Coal forms from dead swamp plants. • Coal was found in Antarctica, therefore Antarctica must have been closer to the equator at one time. ...
... • Coal forms from dead swamp plants. • Coal was found in Antarctica, therefore Antarctica must have been closer to the equator at one time. ...
1-2 Notes: Continental Drift Continents Join Together and Split Apart
... South America and Western _____________________. There are many other fossils found around the world that support the theory of continental drift. Climate Greenland is an island near the Arctic circle that is covered in ice. BUT…Fossils of ____________________ plants can be found on the shores ...
... South America and Western _____________________. There are many other fossils found around the world that support the theory of continental drift. Climate Greenland is an island near the Arctic circle that is covered in ice. BUT…Fossils of ____________________ plants can be found on the shores ...
Plate Tectonics
... Pangaea • Alfred Wegener proposed the theory of continental drift in early 1900’s • Wegener’s theorized that all the continents were once a single landmass. (Pangaea) • All continents were once joined and began gradually moving apart, in fact they’re still moving. ...
... Pangaea • Alfred Wegener proposed the theory of continental drift in early 1900’s • Wegener’s theorized that all the continents were once a single landmass. (Pangaea) • All continents were once joined and began gradually moving apart, in fact they’re still moving. ...
In geologic terms, a plate is a large, rigid slab of solid rock
... of the South American and African continents, first noted by Abraham Ortelius three centuries earlier. Wegener was also intrigued by the occurrences of unusual geologic structures and of plant and animal fossils found on the matching coastlines of South America and Africa, which are now widely separ ...
... of the South American and African continents, first noted by Abraham Ortelius three centuries earlier. Wegener was also intrigued by the occurrences of unusual geologic structures and of plant and animal fossils found on the matching coastlines of South America and Africa, which are now widely separ ...
Document
... Pangaea • Alfred Wegener proposed the theory of continental drift in early 1900’s • Wegener’s theorized that all the continents were once a single landmass. (Pangaea) • All continents were once joined and began gradually moving apart, in fact they’re still moving. ...
... Pangaea • Alfred Wegener proposed the theory of continental drift in early 1900’s • Wegener’s theorized that all the continents were once a single landmass. (Pangaea) • All continents were once joined and began gradually moving apart, in fact they’re still moving. ...
Plate Tectonics - Net Start Class
... d. Wegener’s interpretation was that rocks indicating cold conditions were depositd when the continent was near a pole and vice versa for warm areas. Changes were the result of continent’s drifting in and out of different latitudes. ...
... d. Wegener’s interpretation was that rocks indicating cold conditions were depositd when the continent was near a pole and vice versa for warm areas. Changes were the result of continent’s drifting in and out of different latitudes. ...
Chapter 2 – Plate Tectonics
... The inner core is 4000°C and made of nickel and iron. It has one million times as much pressure as the surface of the earth. The outer part of the mantle is plastic and can flow, the asthenoshere. Ocean and continental crust float on top. Ocean crust is thinner and more dense, mostly basalt. ...
... The inner core is 4000°C and made of nickel and iron. It has one million times as much pressure as the surface of the earth. The outer part of the mantle is plastic and can flow, the asthenoshere. Ocean and continental crust float on top. Ocean crust is thinner and more dense, mostly basalt. ...
Oceanography - saddlespace.org
... Originally above sea level. Tops remove by wave action. Coral Atolls. Ring shaped Coral Islands. Formed from sinking ocean floor Coral reef “grows” at the top Mid-Ocean ridges Shallow areas where mountain chains are being volcanically built. The ocean bottom is youngest at the mid ocean ridge. ...
... Originally above sea level. Tops remove by wave action. Coral Atolls. Ring shaped Coral Islands. Formed from sinking ocean floor Coral reef “grows” at the top Mid-Ocean ridges Shallow areas where mountain chains are being volcanically built. The ocean bottom is youngest at the mid ocean ridge. ...
Pangaea
... area, magma began to push through and create a volcanic rift zone. Eventually the rift zone grew so large that it formed a basin and Pangaea began to separate. In the areas where Pangaea began to separate, new oceans formed, such as the Atlantic Ocean. 80 million years ago, North America and Europe ...
... area, magma began to push through and create a volcanic rift zone. Eventually the rift zone grew so large that it formed a basin and Pangaea began to separate. In the areas where Pangaea began to separate, new oceans formed, such as the Atlantic Ocean. 80 million years ago, North America and Europe ...
This test review is in preparation for a chemistry test
... 12) The puzzle-like fit of the continents is one of the evidences given to explain continental drift (yes, this should be one of your answers for #6!), but the continents don’t fit together perfectly. Why? ...
... 12) The puzzle-like fit of the continents is one of the evidences given to explain continental drift (yes, this should be one of your answers for #6!), but the continents don’t fit together perfectly. Why? ...
Chapter 4 Babbey
... • Density is the measure of how much mass there is in a volume of a substance. ...
... • Density is the measure of how much mass there is in a volume of a substance. ...
Position of the continents
... Watch the movement happening under the crust • Yellow = very hot rock moving from toward the Earth’s crust • Blue = cool sections of the crust and upper mantle sinking down toward the center of the Earth ...
... Watch the movement happening under the crust • Yellow = very hot rock moving from toward the Earth’s crust • Blue = cool sections of the crust and upper mantle sinking down toward the center of the Earth ...
Letter to the Author
... regarding prehistoric climates. A little over two hundred thousand years ago South Africa, India, Australia, and part of South America were burdened with great ice sheets, while at the same time a tropical rain forest covered North America, Europe, and China. At various other times, there was suffic ...
... regarding prehistoric climates. A little over two hundred thousand years ago South Africa, India, Australia, and part of South America were burdened with great ice sheets, while at the same time a tropical rain forest covered North America, Europe, and China. At various other times, there was suffic ...
Lecture 2: Dynamic Earth: Plate Tectonics
... mantle spreads laterally. At deep-ocean trenches, the ocean crust is drawn back into the planet. ...
... mantle spreads laterally. At deep-ocean trenches, the ocean crust is drawn back into the planet. ...
A history of supercontinents on planet Earth
... Between Rodinia and Pangaea, there may have been one other supercontinent, which is known as Pannotia. Assuming it existed - and there's still disagreement on that point - Pannotia was something of an accidental supercontinent, created by glancing collisions between tectonic plates instead of any re ...
... Between Rodinia and Pangaea, there may have been one other supercontinent, which is known as Pannotia. Assuming it existed - and there's still disagreement on that point - Pannotia was something of an accidental supercontinent, created by glancing collisions between tectonic plates instead of any re ...
Word - LEARNZ
... In the 1920’s Alfred Wegener proposed the theory of continental drift; that there was one super continent, Pangaea, ( meaning all lands ), and that this broke up, forming the continents of today. Originally his ideas ...
... In the 1920’s Alfred Wegener proposed the theory of continental drift; that there was one super continent, Pangaea, ( meaning all lands ), and that this broke up, forming the continents of today. Originally his ideas ...
oceans
... Origin of the Continents • Alfred Wegener suggested the continents were not always on their present positions • Continental Drift • 200mya a single landmass called Pangea broke up • Evidence – Coastlines fit like a puzzle – Similar fossils and rock formations on different continents ...
... Origin of the Continents • Alfred Wegener suggested the continents were not always on their present positions • Continental Drift • 200mya a single landmass called Pangea broke up • Evidence – Coastlines fit like a puzzle – Similar fossils and rock formations on different continents ...
Developing a Theory of Plate Tectonics
... Appalachian chain because they line up when pieced together. ...
... Appalachian chain because they line up when pieced together. ...
On the Origin of the Mediterranean Sea and its Surrounding
... As stated already last year during this conference, it is a fact that tidal forces of the Earth – Moon double system act w e s t w a r d on Earth (i.e. within the Earth’s hydrosphere a n d lithosphere) whereas the off-centre rotation of the Earth – Moon double system ultimately results in an e a s t ...
... As stated already last year during this conference, it is a fact that tidal forces of the Earth – Moon double system act w e s t w a r d on Earth (i.e. within the Earth’s hydrosphere a n d lithosphere) whereas the off-centre rotation of the Earth – Moon double system ultimately results in an e a s 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.