Subduction zone Study guides, Class notes & Summaries

Employee Assistance Programs | EAPS 100 Exam 1 The point where oceanic crust begins sinking in subduction zones is marked by what type of topographic feature? A deep canyon known as a 'trench' What is the key process that causes the ocean crust to be pulled into the Earth's mantle? Metamorphism transforms the basalt that forms ocean crust into a rock that is more dense than the Earth's upper mantle. This transition pulls oceanic crust downward as it sinks. We now think that plate tectonics...

Which of the following best describes the fundamental concept if superposition? - Any sedimentary deposit accumulates on older rock or sediment layers. New oceanic crust and lithosphere are formed at ______________ - divergent boundaries by submarine eruptions and intrusions of mafic magma Deep ocean trenches are surficial evidence for _________________ - Sinking of oceanic lithosphere into the mantle at a subduction zone. Since the early Mesozoic, the ________ has been passive tectonica...

The type of magma associated with oceanic hot spots - mafic Decompression melting in this setting forms a long, submarine ridge - divergent boundary When mafic magma rising from the mantel rises through this type of crust, it will form int-felsic magma - Continental crust Shield volcanoes may form here, when magma upwells from the asthenosphere - hot spot The type of magma that most commonly forms at subduction zones - int-felsic magma This tectonic setting can form an explosive caldera - ...

lithosphere A rigid layer made up of the uppermost part of the mantle and the crust. plate tectonics The theory that explains how large pieces of the lithosphere, called plates, move and change shape. Alfred Wegener A German scientist who proposed the theroy of continental drift mantle Earth's thickest layer made of hot rock and is less dense than the core, less hot, and has less pressure on it. It also has plasticity crust Earth's outermost layer. plate...

Why is science limited to the natural world? Science acquires knowledge through examination of falsifiable hypotheses based on natural phenomena. This sets a limit on sciences; science cannot speak directly to such issues as morality or religion. Why isn't faith science? Scientific ideas can only be proven wrong. A theory stands because observation or experimentation never proves its tenets wrong. What is the age of the earth? 4.6 billion years old. What is the evidence ...

Theory of Plate Tectonics - Answer A theory stating that Earth's lithosphere is broken into huge plates that move and change in size over time - explains the process of continental drift - theory is a fusion on the theories of continental drift and seafloor spreading - continents are not floating on the ocean, rather they are rooted What are the 10 major plates of the Earth's lithosphere? - Answer African, Antarctic, Australian, Eurasian, North American, South American, Pacific, Cocos, N...

Geology 111 Exam Questions With Verified Solutions Tectonic processes - answerupwelling of magma, plate movement, subduction of crust, folding, faulting, warping, fracturing, earthquakes, volcanic activity, magmatism, ocean ridges, rift valleys, trenches, collision, continental rifting, mountain formation Tectonic characteristics - answerLandforms: volcanoes, earthquakes, faults, mountain ranges, mid ocean ridge, deep ocean trenches, rift valleys Earthquakes occur - answerWhen brittle roc...

apes unit 4 frq Question and answers correctly solved 2023/2024 describe what happens when two tectonic plates collide in a subduction zone - correct answer in a subduction zone, one plate is pushed beneath the other. a trench may be formed at the subduction zone. explain how subduction leads to volcanic activity - correct answer The plate closer to the core melts and becomes magma, which pushes towards the surface. When the magma reaches the surface, it becomes lava and releases through the...

SCIN 138 Week 8 Final Exam 2023 | SCIN 138 INTRODUCTION TO PHYSICAL GEOLOGY. A coarse-grained (phaneritic texture) igneous rock formed _________________.  A. on the surface of the earth in a quiet (effusive) eruption  B. by immense direct pressure and heat  C. due to erosion, frost wedging, and weathering  D. on the surface of the earth in an explosive eruption  E. deep under the surface of the earth Question 5 of 50 2.0/ 2.0 Points Where is the top of the asthenosphe...

Week 8 Final Exam (timed and single access) Overall Grade (highest attempt): 96 / 100 - 96 % Question 1 2/2 points Pyroclastic flows are more associated with __________. ocean hot spots stratovolcanoes shield volcanoes flood basalts cinder cones Question 2 2/2 points In the rock cycle, what processes directly link igneous rocks to metamorphic rocks? compaction and cementation melting and crystallization deposition and lithification recrystallization by high heat and pressure weat...