Ocean Basins
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins older, colder ocean crust water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal pl ...
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins older, colder ocean crust water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal pl ...
PPT
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins older, colder ocean crust water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal pl ...
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins older, colder ocean crust water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal pl ...
Plate Tectonics - Choteau Schools
... Developed in 1960’s Combined continental drift and seafloor ...
... Developed in 1960’s Combined continental drift and seafloor ...
Sea floor spreading= the process by which new oceanic crust is
... place to go. It is forced upwards and forms volcanoes and mountain ranges fairly close to the shore. Won’t we eventually run out of crust you may ask? Well, at the mid-ocean ridge, new crust is being formed through the process of sea-floor spreading. Mantle convection causes new hot rock to be force ...
... place to go. It is forced upwards and forms volcanoes and mountain ranges fairly close to the shore. Won’t we eventually run out of crust you may ask? Well, at the mid-ocean ridge, new crust is being formed through the process of sea-floor spreading. Mantle convection causes new hot rock to be force ...
Chapter 10 Notes Blank
... -Appalachian mountains of the USA are similar to mountains found in __________& western Europe -Rocks of South America match those in __________ Main __________ to Wegener’s hypothesis was its inability to provide a __________ for the movement of the continents. __________ Spreading ...
... -Appalachian mountains of the USA are similar to mountains found in __________& western Europe -Rocks of South America match those in __________ Main __________ to Wegener’s hypothesis was its inability to provide a __________ for the movement of the continents. __________ Spreading ...
CONSTRUCTING A SEA-FLOOR SPREADING MODEL
... know as plates. The lithospheric plates, carrying both oceanic and continental rock, “float” on the plastic part of the mantle below the lithosphere. Plates move together, separate, and slide past each other creating regions of volcanic activity, mountain building and earthquakes. The plates are tho ...
... know as plates. The lithospheric plates, carrying both oceanic and continental rock, “float” on the plastic part of the mantle below the lithosphere. Plates move together, separate, and slide past each other creating regions of volcanic activity, mountain building and earthquakes. The plates are tho ...
1 Planet Earth
... – Ocean composition influenced by biosphere precipitation of calcium carbonate – Fossils fuels – Fossils record past Earth environments • Current living species account for only 10% of known species throughout geologic history ...
... – Ocean composition influenced by biosphere precipitation of calcium carbonate – Fossils fuels – Fossils record past Earth environments • Current living species account for only 10% of known species throughout geologic history ...
theory of plate tectonics
... a. thin outer shell of earth b. less dense than material below which causes movement of plates = broken into sections 1) have identified 30 so far 2) interact together to create major surface features a) move toward each other and collide b) moving apart c) slide past one another c. composed of gran ...
... a. thin outer shell of earth b. less dense than material below which causes movement of plates = broken into sections 1) have identified 30 so far 2) interact together to create major surface features a) move toward each other and collide b) moving apart c) slide past one another c. composed of gran ...
The Theory of Tectonic Plates
... 3. Briefly describe three possible driving forces of tectonic plate movement.! ...
... 3. Briefly describe three possible driving forces of tectonic plate movement.! ...
Plate tectonics and Volcanoes
... plate boundaries (where two plates meet). Plates can: Converge or come together 2. Diverge or move apart 3. Slide past one another horizontally ...
... plate boundaries (where two plates meet). Plates can: Converge or come together 2. Diverge or move apart 3. Slide past one another horizontally ...
Plate Tectonics
... 4. Climatic patterns shown by rock layers: Some rock types only form in certain climates, for example coal, which forms in warm, very wet (rainy) environments. If coal is found in a place that is not warm and rainy, then either the climate has changed or the rock has moved. ...
... 4. Climatic patterns shown by rock layers: Some rock types only form in certain climates, for example coal, which forms in warm, very wet (rainy) environments. If coal is found in a place that is not warm and rainy, then either the climate has changed or the rock has moved. ...
Ch. 9 Review - 8th Grade Science
... • 13. How does a hot spot form a volcanic island? – At a hot spot on the ocean floor, magma from the mantle melts through the crust, forming a volcanic island. ...
... • 13. How does a hot spot form a volcanic island? – At a hot spot on the ocean floor, magma from the mantle melts through the crust, forming a volcanic island. ...
PANGAEAPOWERPOINT
... pieces of a puzzle…..the shapes of the coastlines of Africa and South America are a good example. As you discovered through your modeling activity, they once fit together. The Earth as we see it was not always like it is today. Land masses have been pulled apart and joined together by the process we ...
... pieces of a puzzle…..the shapes of the coastlines of Africa and South America are a good example. As you discovered through your modeling activity, they once fit together. The Earth as we see it was not always like it is today. Land masses have been pulled apart and joined together by the process we ...
- cK-12
... a) Magma rises beneath the continent. b) The continent becomes thinner. c) The continent undergoes faulting and splits. d) All of the above. ...
... a) Magma rises beneath the continent. b) The continent becomes thinner. c) The continent undergoes faulting and splits. d) All of the above. ...
1 Possible Test Questions Unit 10 TECTONIC
... A. (page 17) The Earth consists of three concentric layers; this orderly division results from? ____ B. (Page 17) The mantle is thought to be composed of what dark, dense igneous rock? _____ C. (Page 31) Edward Suess in 1885 noted a common plant fossil (Glossopteris) on many continents. How did he p ...
... A. (page 17) The Earth consists of three concentric layers; this orderly division results from? ____ B. (Page 17) The mantle is thought to be composed of what dark, dense igneous rock? _____ C. (Page 31) Edward Suess in 1885 noted a common plant fossil (Glossopteris) on many continents. How did he p ...
Plate Tectonics and Continental Accretion
... Plate-tectonic theory can help explain how continents slowly grow. This process is easily seen in subduction zones where on oceanic plate descends beneath a continental plate. Fragments of rocks forming the upper layers of the oceanic plate are scraped off the downgoing oceanic plate and become smea ...
... Plate-tectonic theory can help explain how continents slowly grow. This process is easily seen in subduction zones where on oceanic plate descends beneath a continental plate. Fragments of rocks forming the upper layers of the oceanic plate are scraped off the downgoing oceanic plate and become smea ...
Name: :____________Per:___ Plate Tectonics Test 1. Who was the
... 3. Heated material expands and rises, then cools. As it cools, it becomes denser and falls. This circular movement of material is called _ a. conduction b. radiation c. convection currents d. thermodynamics 4. The theory that states that the continents were once connected but drifted apart over time ...
... 3. Heated material expands and rises, then cools. As it cools, it becomes denser and falls. This circular movement of material is called _ a. conduction b. radiation c. convection currents d. thermodynamics 4. The theory that states that the continents were once connected but drifted apart over time ...
Continental - itslearning
... Oceanographers began to wonder about the long deep trenches they had also discovered in the oceans, particularly the Pacific. Often these trenches had volcanic mountain chains along one side and had frequent earthquakes. Trench ...
... Oceanographers began to wonder about the long deep trenches they had also discovered in the oceans, particularly the Pacific. Often these trenches had volcanic mountain chains along one side and had frequent earthquakes. Trench ...
Week 6 Quiz- Weathering, Soil, Plate Tectonics Name
... A. sea floor spreading and continental drift C. continental drift and fossil theory B. sea floor spreading and tidal theory D. continental drift and Big Bang theory ____25. Large pieces of the lithosphere that float on the asthenosphere are called: A. asthenosphere B. the mid-ocean ridge C. deep-sea ...
... A. sea floor spreading and continental drift C. continental drift and fossil theory B. sea floor spreading and tidal theory D. continental drift and Big Bang theory ____25. Large pieces of the lithosphere that float on the asthenosphere are called: A. asthenosphere B. the mid-ocean ridge C. deep-sea ...
Unit Three Review Guide: Plate Tectonics
... 1. What is a mid-ocean ridge and what is produced here? 2. How does the age of oceanic crust change the further it gets from the mid-ocean ridge? 3. Explain the relationship between normal polarity, reversed polarity, magnetic reversal, and the evidence for seafloor spreading. 4. What theory does ‘s ...
... 1. What is a mid-ocean ridge and what is produced here? 2. How does the age of oceanic crust change the further it gets from the mid-ocean ridge? 3. Explain the relationship between normal polarity, reversed polarity, magnetic reversal, and the evidence for seafloor spreading. 4. What theory does ‘s ...
PGC-Abstract_CParkin
... was then overshot using a 6000 cu inch, low frequency, broadband airgun source designed to optimise seismic penetration at long-offsets and wide-angles. Magnetics, bathymetry and gravity data were acquired as well as conventional, near offset seismic data, using a 3km multichannel streamer. The wide ...
... was then overshot using a 6000 cu inch, low frequency, broadband airgun source designed to optimise seismic penetration at long-offsets and wide-angles. Magnetics, bathymetry and gravity data were acquired as well as conventional, near offset seismic data, using a 3km multichannel streamer. The wide ...
Ch 17 Plate Tectonics
... 1. Describe early evidence that led people to suggest that Earth’s continents may have once been joined. 2. Discuss evidence of continental drift. 3. Explain why continental drift was not accepted when it was first proposed. 4. Summarize the evidence that led to the discovery of seafloor spreading. ...
... 1. Describe early evidence that led people to suggest that Earth’s continents may have once been joined. 2. Discuss evidence of continental drift. 3. Explain why continental drift was not accepted when it was first proposed. 4. Summarize the evidence that led to the discovery of seafloor spreading. ...
Ocean Floor
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
Key - Scioly.org
... 5. How does a continental margin differ from a deep ocean basin? (1 point) The continental margin is characterized by thick (and less dense) granitic rock of the continents. Near shore the features of the ocean floor are similar to those of the adjacent continents because they share the same graniti ...
... 5. How does a continental margin differ from a deep ocean basin? (1 point) The continental margin is characterized by thick (and less dense) granitic rock of the continents. Near shore the features of the ocean floor are similar to those of the adjacent continents because they share the same graniti ...
The Theory of Continental Drift
... • Why are some regions of Earth dotted with many active volcanoes while other regions have none? Why do earthquakes occur frequently in certain areas? – The theory of plate tectonics: Earth’s crust and rigid upper mantle are broken into enormous slabs called plates. • They move in different directio ...
... • Why are some regions of Earth dotted with many active volcanoes while other regions have none? Why do earthquakes occur frequently in certain areas? – The theory of plate tectonics: Earth’s crust and rigid upper mantle are broken into enormous slabs called plates. • They move in different directio ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.