ANSWER - Test Bank 1
... c. Anthropologists have found human carvings in Africa that match those in Brazil. d. Glaciers near the mouth of the Amazon River in Brazil carried distinctive rocks into South Africa, demonstrating that those countries were once connected. e. Ages of bedrock formations match across the Atlantic Oce ...
... c. Anthropologists have found human carvings in Africa that match those in Brazil. d. Glaciers near the mouth of the Amazon River in Brazil carried distinctive rocks into South Africa, demonstrating that those countries were once connected. e. Ages of bedrock formations match across the Atlantic Oce ...
Magmatic and non-magmatic history of the Tyrrhenain backarc
... mantle in the deepest region of the Tyrrhenian, previously interpreted by other authors as oceanic crust. In this case, converted S-waves were used to derive the overall Vp/Vs and Poisson0 s ratio, as well as S-wave velocity of the basement. The results show values in agreement with serpentinized pe ...
... mantle in the deepest region of the Tyrrhenian, previously interpreted by other authors as oceanic crust. In this case, converted S-waves were used to derive the overall Vp/Vs and Poisson0 s ratio, as well as S-wave velocity of the basement. The results show values in agreement with serpentinized pe ...
File
... the asthenosphere. where does this happen? An area that sinks beneath What is a subduction zone? a less dense plate during convergence What happens at a convergent boundary involving two oceanic plates? ...
... the asthenosphere. where does this happen? An area that sinks beneath What is a subduction zone? a less dense plate during convergence What happens at a convergent boundary involving two oceanic plates? ...
GTPlate Tectonics, Continental Drift and Seafloor Spreading
... • Many believed Wegener’s theory was just that, merely a theory. • Many said there was no mechanism to explain how the continents could have moved apart. • Until..... ...
... • Many believed Wegener’s theory was just that, merely a theory. • Many said there was no mechanism to explain how the continents could have moved apart. • Until..... ...
Integration of drilling into deep oceanic crust and seafloor
... some plate cooling models explaining the global distribution of bathymetric subsidence, heat flow, and geoid height with the lithospheric age. However, some geophysical observations revealed anomalous features from the prediction of the plate cooling models in nominally normal ocean basin. Recent pr ...
... some plate cooling models explaining the global distribution of bathymetric subsidence, heat flow, and geoid height with the lithospheric age. However, some geophysical observations revealed anomalous features from the prediction of the plate cooling models in nominally normal ocean basin. Recent pr ...
day 1 Objective and HW
... 10. The Marianas Trench, where the Pacific Plate descends under the leading edge of the Eurasian Plate, is the deepest sea floor in the world. These ocean trenches form when two oceanic plates collide. A. and the younger, less dense of the two plates rides over the edge of the older plate. B. and th ...
... 10. The Marianas Trench, where the Pacific Plate descends under the leading edge of the Eurasian Plate, is the deepest sea floor in the world. These ocean trenches form when two oceanic plates collide. A. and the younger, less dense of the two plates rides over the edge of the older plate. B. and th ...
I. Divergent Boundaries A. Moving apart B. Sea Floor spreading at
... a. made from upwelling, hot melt from mantle b. hotter things are less dense c. as sea floor moves away from ridge, it cools 1) contracts as it cools, becomes more dense 2) increase in lithosphere thickness because cooling strengthens underlying mantle ...
... a. made from upwelling, hot melt from mantle b. hotter things are less dense c. as sea floor moves away from ridge, it cools 1) contracts as it cools, becomes more dense 2) increase in lithosphere thickness because cooling strengthens underlying mantle ...
Chapter 20 Study Notes Ocean Water
... ocean because they form the base of the ocean ______ _____. – Plankton – food chain. ...
... ocean because they form the base of the ocean ______ _____. – Plankton – food chain. ...
Continental Drift and Plate Tectonics
... What geologic features form at convergent plate boundaries? 1. Collision between oceanic crust and continental crust – basalt (oceanic crust) more dense than granite (continental crust) – forms deep ocean trenches where ocean crust is subducted into mantle – forms volcanoes on continent due to melt ...
... What geologic features form at convergent plate boundaries? 1. Collision between oceanic crust and continental crust – basalt (oceanic crust) more dense than granite (continental crust) – forms deep ocean trenches where ocean crust is subducted into mantle – forms volcanoes on continent due to melt ...
MoMAR
... hydrosphere and biosphere. Seawater circulates through the permeable upper oceanic crust at mid-ocean ridges, exchanges chemicals with the surrounding rocks, and is heated up to temperatures of a few hundred degrees Celsius. This hot fluid flows up and is expelled at hydrothermal sites, in the form ...
... hydrosphere and biosphere. Seawater circulates through the permeable upper oceanic crust at mid-ocean ridges, exchanges chemicals with the surrounding rocks, and is heated up to temperatures of a few hundred degrees Celsius. This hot fluid flows up and is expelled at hydrothermal sites, in the form ...
Chapter 4 Assignment GEarthOL
... chapter and completed checkpoint 4.13 (above). FOR EXAMPLE (many students struggle with this question but it’s important to understand these patterns): number 4 above is patterns of volcanic activity: so think about this, where are volcanoes generally located? Are they found at divergent boundaries? ...
... chapter and completed checkpoint 4.13 (above). FOR EXAMPLE (many students struggle with this question but it’s important to understand these patterns): number 4 above is patterns of volcanic activity: so think about this, where are volcanoes generally located? Are they found at divergent boundaries? ...
Plate Tectonics - Nogales High School
... surface as the plates move apart. The magma cools to form new ocean floor. Creates a mid-ocean ridge with a rift valley. Example: Atlantic Ocean, Red Sea ...
... surface as the plates move apart. The magma cools to form new ocean floor. Creates a mid-ocean ridge with a rift valley. Example: Atlantic Ocean, Red Sea ...
Building Features on Eearth`s Surface
... special deep-diving submersibles. Where an oceanic plate is subducted under another plate, it bends downward as it enters the subduction zone. The valley that is formed above the zone of bending is called a trench. Oceanic trenches are very deep. Many are deeper than 10,000 m, which is twice the ave ...
... special deep-diving submersibles. Where an oceanic plate is subducted under another plate, it bends downward as it enters the subduction zone. The valley that is formed above the zone of bending is called a trench. Oceanic trenches are very deep. Many are deeper than 10,000 m, which is twice the ave ...
The NEPTUNE Canada Regional Cabled Ocean Observatory
... water depth, where the vertical profiler will collect a variety of water property and biological data. Tsunamis-Seismicity. At site ODP 1027 on the abyssal plain in 2,660 meters' water depth, existing ocean drilling program borehole monitoring systemswill be connected to the observatory. Two circula ...
... water depth, where the vertical profiler will collect a variety of water property and biological data. Tsunamis-Seismicity. At site ODP 1027 on the abyssal plain in 2,660 meters' water depth, existing ocean drilling program borehole monitoring systemswill be connected to the observatory. Two circula ...
Title
... The student will gain a good grounding in the ecology of deep-sea chemosynthetic ecosystems. It is intended that the student will participate in future expeditions to the Mid-Atlantic Ridge and the Haakon Mosby Mud Volcano. Experience, therefore, will be gained on sampling difficult environments in ...
... The student will gain a good grounding in the ecology of deep-sea chemosynthetic ecosystems. It is intended that the student will participate in future expeditions to the Mid-Atlantic Ridge and the Haakon Mosby Mud Volcano. Experience, therefore, will be gained on sampling difficult environments in ...
Notes on Plates: Sliding, Colliding, and Separating (text pgs. 174-175)
... the boundaries crumple and lift up, forming mountains. The older, colder, more dense oceanic plate slides underneath the younger, warmer less dense plate creating a trench in the ocean floor. The older plate sinks into the hot interior and “melts”, ...
... the boundaries crumple and lift up, forming mountains. The older, colder, more dense oceanic plate slides underneath the younger, warmer less dense plate creating a trench in the ocean floor. The older plate sinks into the hot interior and “melts”, ...
CORKS in the Crust: Part 1
... programs (DSDP, ODP, and IODP) have studied Earth’s history by sampling and analyzing rock and sediment cores from thousands of sites on the ocean floor. Scientists have also been able to measure a host of properties like pressure, temperature, and water chemistry in the boreholes after the cores ar ...
... programs (DSDP, ODP, and IODP) have studied Earth’s history by sampling and analyzing rock and sediment cores from thousands of sites on the ocean floor. Scientists have also been able to measure a host of properties like pressure, temperature, and water chemistry in the boreholes after the cores ar ...
(to organic matter) in the “twilight zone”?
... with only a fraction reaching the sea floor to be preserved in the sediments. Yet the balance between the extent of organic matter degradation and sequestration of any surviving carbon in the deep ocean and sediments affects global carbon cycling and is the basis by which past oceanic conditions and ...
... with only a fraction reaching the sea floor to be preserved in the sediments. Yet the balance between the extent of organic matter degradation and sequestration of any surviving carbon in the deep ocean and sediments affects global carbon cycling and is the basis by which past oceanic conditions and ...
Study Guide Key
... Transform boundary: A plate boundary where tectonic plates move past each other creating tension Divergent boundary: A plate boundary where tectonic plates dive away from each other Uplift: The upward vertical motion of Earth’s surface Folded Mountain: Mountains made of layers of rock that are folde ...
... Transform boundary: A plate boundary where tectonic plates move past each other creating tension Divergent boundary: A plate boundary where tectonic plates dive away from each other Uplift: The upward vertical motion of Earth’s surface Folded Mountain: Mountains made of layers of rock that are folde ...
Geology 111 - A8 - New ideas on continental drift
... destruction of crustal material. As shown above, most transform faults connect segments of midocean ridges and are thus ocean-ocean boundaries. [See Fig. 12.15] Some transform faults connect continental parts of plates. An example is the San Andreas Fault, which connects the Juan de Fuca ridge with ...
... destruction of crustal material. As shown above, most transform faults connect segments of midocean ridges and are thus ocean-ocean boundaries. [See Fig. 12.15] Some transform faults connect continental parts of plates. An example is the San Andreas Fault, which connects the Juan de Fuca ridge with ...
EXPLORE AN OCEAN`S FLOOR
... extending from the shoreline toward the deep ocean basin and is composed of sediments deposited by streams. Most sea life and commercial fishing occurs on the shelf. At the seaward edge of the shelf the continental slope begins. It has a steeper gradient than the shelf, allowing sediments to slide d ...
... extending from the shoreline toward the deep ocean basin and is composed of sediments deposited by streams. Most sea life and commercial fishing occurs on the shelf. At the seaward edge of the shelf the continental slope begins. It has a steeper gradient than the shelf, allowing sediments to slide d ...
Earth`s interior volc eq4
... Sea Floor Spreading • The process by which new oceanic lithosphere forms as magma rises to the surface and solidifies – Evidence for continental drift ...
... Sea Floor Spreading • The process by which new oceanic lithosphere forms as magma rises to the surface and solidifies – Evidence for continental drift ...
Seismic reflection image of the Great Sumatra
... Subduction megathrusts are generally thought to lie near the top of the subducting basaltic layer or in the overlying sediments21. Here there is no evidence for a reflector in the sediments that could be interpreted as a décollement, which suggests a plate interface at or below the top of the igneo ...
... Subduction megathrusts are generally thought to lie near the top of the subducting basaltic layer or in the overlying sediments21. Here there is no evidence for a reflector in the sediments that could be interpreted as a décollement, which suggests a plate interface at or below the top of the igneo ...
Document
... • Ocean crust - Only up to 180 million years old. • Why is the ocean floor so young relative to the continents? — The answer is in plate tectonics ...
... • Ocean crust - Only up to 180 million years old. • Why is the ocean floor so young relative to the continents? — The answer is in plate tectonics ...
Tectonic plates - Hobbs High School
... together by internal forces. At most convergent plate boundaries, the oceanic lithosphere is carried downward under the island or continent. Earthquakes are common here. It also forms an ocean ridge or a mountain range. Convergent ...
... together by internal forces. At most convergent plate boundaries, the oceanic lithosphere is carried downward under the island or continent. Earthquakes are common here. It also forms an ocean ridge or a mountain range. Convergent ...
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.