john_baross_geoscience_definitionsx
... Crust: Surface layer of the earth, about 35 km thick in continental regions and of sialic (Si and Al rich) character, including granitoids, metamorphic rocks and sediments; and about 8 km thick in oceanic regions, where it is composed of basalts, gabbros and cumulate rocks, overlain by sediment. EMO ...
... Crust: Surface layer of the earth, about 35 km thick in continental regions and of sialic (Si and Al rich) character, including granitoids, metamorphic rocks and sediments; and about 8 km thick in oceanic regions, where it is composed of basalts, gabbros and cumulate rocks, overlain by sediment. EMO ...
Chapter 4: Plate Tectonics
... apart at mid-ocean ridges Magma rises and cools creating new sea-floor. Gravity pulls old, dense sea-floor down beneath the trench. Old sea-floor is recycled back into the mantle. Takes 200 million years! ...
... apart at mid-ocean ridges Magma rises and cools creating new sea-floor. Gravity pulls old, dense sea-floor down beneath the trench. Old sea-floor is recycled back into the mantle. Takes 200 million years! ...
Ocean life
... • Water depth • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
... • Water depth • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
Last Time Polymorphs of SiO2 - University of South Alabama
... Six stages in the ocean cycle are recognized by geologists: 1) Embryonic (e.g., East African Rift) 2) Young (e.g., Red Sea) 3) Mature (e.g., Atlantic Ocean) 4) Declining (e.g., Pacific Ocean) 5) Terminal (e.g., Mediterranean Sea) 6) Relict (e.g., ophiolites) ...
... Six stages in the ocean cycle are recognized by geologists: 1) Embryonic (e.g., East African Rift) 2) Young (e.g., Red Sea) 3) Mature (e.g., Atlantic Ocean) 4) Declining (e.g., Pacific Ocean) 5) Terminal (e.g., Mediterranean Sea) 6) Relict (e.g., ophiolites) ...
Wegener - Course World
... Tectonic plates, sometimes called lithospheric plates, are large, irregularly shaped slabs of oceanic and/or continental crust. Much like a flagstone sidewalk, plates come in many ...
... Tectonic plates, sometimes called lithospheric plates, are large, irregularly shaped slabs of oceanic and/or continental crust. Much like a flagstone sidewalk, plates come in many ...
Earth`s Surface
... began to collide and clump together. These clumps collided with other clumps until eventually, the Earth and other planets were formed. The early Earth was likely extremely hot and the rock was molten in nature. This allowed the materials that make up the Earth to settle according to their density. ...
... began to collide and clump together. These clumps collided with other clumps until eventually, the Earth and other planets were formed. The early Earth was likely extremely hot and the rock was molten in nature. This allowed the materials that make up the Earth to settle according to their density. ...
The Earth`s Tectonic Plates and Continental Drift
... A crack, called a rift, forms between them. New crust is formed as magma rises up through the rift. ...
... A crack, called a rift, forms between them. New crust is formed as magma rises up through the rift. ...
Mountain Building Quiz
... 5) Mountain ranges do not form at these convergent plate boundaries. a) Oceanic crust-oceanic crust b) Oceanic crust-continental crust c) Continental crust-continental crust d) None of the above. Mountain ranges form at all types of convergent plate boundaries. ...
... 5) Mountain ranges do not form at these convergent plate boundaries. a) Oceanic crust-oceanic crust b) Oceanic crust-continental crust c) Continental crust-continental crust d) None of the above. Mountain ranges form at all types of convergent plate boundaries. ...
Convergent and Divergent plate boundaries
... faults, forming a continental rift, like in the Great Rift Valley. The down-dropped blocks may form basins that can trap sediment and water, resulting in lakes. Deep rifting causes solid mantle material in the asthenosphere to flow upward and partially melt. The resulting magma may solidify beneath ...
... faults, forming a continental rift, like in the Great Rift Valley. The down-dropped blocks may form basins that can trap sediment and water, resulting in lakes. Deep rifting causes solid mantle material in the asthenosphere to flow upward and partially melt. The resulting magma may solidify beneath ...
Ocean life - Oakton Community College
... • Water depth • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
... • Water depth • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
Day 5 Subduction Trenches
... http://www2.wwnorton.com/college/geo/egeo/flash/2_9.swf Watch Blue planet video on deep ocean trench life: http://video.google.com/videoplay?docid=6616117576614575795 &q=deep+sea+creatures&total=945&start=0&num=10&so=0&type=se arch&plindex=1 ...
... http://www2.wwnorton.com/college/geo/egeo/flash/2_9.swf Watch Blue planet video on deep ocean trench life: http://video.google.com/videoplay?docid=6616117576614575795 &q=deep+sea+creatures&total=945&start=0&num=10&so=0&type=se arch&plindex=1 ...
Plate Tectonics Learning Targets
... 1. Illustrate and label the layers of the earth including the crust, mantle, outer core and inner core. 2. Describe and explain the Earth’s lithosphere. 3. Describe and explain the Earth’s asthenosphere? 4. What are Earth’s tectonic plates? (TEKS 8.9A) Describe the historical development of evidence ...
... 1. Illustrate and label the layers of the earth including the crust, mantle, outer core and inner core. 2. Describe and explain the Earth’s lithosphere. 3. Describe and explain the Earth’s asthenosphere? 4. What are Earth’s tectonic plates? (TEKS 8.9A) Describe the historical development of evidence ...
Earth’s Complex Complexion
... also detected abundant active hydrothermal venting in a region where current theory predicted their absence. The discovery offers the potential to find vent sites with unique fauna that have evolved in isolation from those in other oceans. These discoveries have now led to the realization that inste ...
... also detected abundant active hydrothermal venting in a region where current theory predicted their absence. The discovery offers the potential to find vent sites with unique fauna that have evolved in isolation from those in other oceans. These discoveries have now led to the realization that inste ...
Word
... Oozes are classified as either siliceous or calcareous, depending on: (97) Acidity below the calcium carbonate compensation depth (CCD) prevents deposition of: ...
... Oozes are classified as either siliceous or calcareous, depending on: (97) Acidity below the calcium carbonate compensation depth (CCD) prevents deposition of: ...
Earth Science, 11e Ocean Water and Ocean Life Chapter 14
... • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
... • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
thetheoryofplatetectonics
... • Lithosphere- rigid layer of Earth about 100 km, made of the crust and part of the upper mantle • Pangaea- large ancient landmass that was composed of all the continents joined together • Plate- a large section of Earth’s oceanic or continental crust and rigid upper mantle that moves around the ast ...
... • Lithosphere- rigid layer of Earth about 100 km, made of the crust and part of the upper mantle • Pangaea- large ancient landmass that was composed of all the continents joined together • Plate- a large section of Earth’s oceanic or continental crust and rigid upper mantle that moves around the ast ...
Earth,Notes,RevQs,Ch13
... 6. To a great extent, the Pacific Ocean is rimmed by deep ocean trenches or deep near-shore basins that trap sediment and prevent turbidity currents from moving farther offshore. The Atlantic Ocean is rimmed mainly by passive, continental margins and turbidity currents with their sediment load can m ...
... 6. To a great extent, the Pacific Ocean is rimmed by deep ocean trenches or deep near-shore basins that trap sediment and prevent turbidity currents from moving farther offshore. The Atlantic Ocean is rimmed mainly by passive, continental margins and turbidity currents with their sediment load can m ...
Continental Drift & Seafloor Spreading
... Seafloor is constant state of creation and destruction New crust emerges at the mid-ocean ridges ...
... Seafloor is constant state of creation and destruction New crust emerges at the mid-ocean ridges ...
PPT
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal plains, smooth surface due t ...
... volcanic eruptions create new ocean crust hot basalt, thermal expansion creates elevation moves away from ridge axis in both directions Abyssal basins water depth – 4000-6000 m (only trenches are deeper) abyssal hills, include rough relief from volcanic formation abyssal plains, smooth surface due t ...
plate tectonics
... The Earth’s crust is divided into 12 major plates which are moved in various directions. This plate motion causes them to collide, pull apart, or scrape against each other. Each type of interaction causes a characteristic set of Earth structures or “tectonic” features. The word, tectonic, re ...
... The Earth’s crust is divided into 12 major plates which are moved in various directions. This plate motion causes them to collide, pull apart, or scrape against each other. Each type of interaction causes a characteristic set of Earth structures or “tectonic” features. The word, tectonic, re ...
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.