> Moving to another question will save this response. Question2 How do we know t

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> Moving to another question will save this response. Question2 How do we know the angle of a subducting plate? They always subduct at a 35 degree angle O we record the locations and depths of the volcanoes and plot them, it is called the wadat-bedati zone O we record the locations and depths of earthquakes and plot them, it is called the wadati-benioff zone O geologists draw a cross section and then someone measures the angle in the drawing Moving to another question will save this response. xlsx ^ PTRE431,Proj Kwasi Asante-PtrE Canceled PTRE431-Homew doc ^ Kwasi Asante PtrE....sx.Kwasi Asante, Ptrisx PTREABL Homew..doc n

Explanation / Answer

Q.2. Ans- We record the locations and depths of earthquakes and plot them, Its called the wadati-benioff zone

Explanation-factors that may influence the angle of subduction are the 1)age of the oceanic lithosphere, which is related to the temperature and density of the oceanic lithosphere 2) and the rate of convergence

lat-slab subduction (<30°): occurs when subducting lithosphere is young and bouyant..

Steep-angle subduction (>70°): occurs in subduction zones where Earth's oceanic crust and lithosphere are old and thick and have, therefore, lost buoyancy.

Q4.Ans- Sediment and sludge from the bottom of ocean, scraped of from subducting plate

Explanation- A wedge- or prism-shaped mass of sediments and rock fragments which has accumulated where a downgoing oceanic plate meets an overriding plate (either oceanic or continental) at a subduction zone. The sediment is generally marine sediment that has been scraped off of the downgoing plate by the overriding plate. However, sediment from the overriding plate can also contribute to the accretionary wedge. Fragments of rock from the colliding tectonic plates can also accumulate in an accretionary wedge.

Q6.ans- Green schist form when sediment and sludge heated and pressurized.

Because- green schist is low grade of metamorphism So when sediment is heated and pressurized then first facies form is green schist facies.

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