5. Draw a line below equal in length to the amount of seafloor spreading that oc
ID: 286356 • Letter: 5
Question
5. Draw a line below equal in length to the amount of seafloor spreading that occurs in one year between the Australian-Indian and Antarctic plates across the Southeast Indian Rise. (In other words, draw a line that is the actual length of the amount of seafloor spreading that happens per year that you found in #4). Does this seem like a lot or a little? Explain. The diagram below shows a cross section of the Earth's tectonic plates. The ocean surface is indicated by a dashed line. A BC E FG 6. In the boxes near the bottom of the diagram, label the two plate boundaries "convergent," and "divergent", respectively 7. Put arrows on either side of each plate boundary showing the direction each plate is moving 8. Using the letters on the cross section above, list the places where each of the rock types below could form. Some letters may be used more than once (have more than one rock type). Example: Igneous rocks would form at location D because the plates are spreading apart and magma is coming up to the surface. Igneous Sedimentary MetamorphicExplanation / Answer
6. In the given diagram, the left box indicates divergent boundary as two plates are diverging from each other here and the right box is indicating of convergent boundary because one plate is subducting beneath the other plate.
7. From the divergent boundary at D location, the arrow will be towards left and right. At the convergent boundary the arrow will be pointing downwards in the case of subducting plate and the overriding plate is coming closer to the convergent boundary.
8. A : Metamorphic rock may be found there because the crust is thickening being older and denser.
B & C : Sedimentary rocks as these are found at shallower depth.
D : Igneous rock at the diverging centre, getting by upwelling of magma.
E : Sedimentary rock. At the trench or subducting boundary a special type of sedimentary rock is formed which is called accretionary prism.
F : Metamorphic rock. Here the bluechist facies metamorphism occurs due to high pressure and low temperature.
G : Igneous rock as the arc is forming due to upwelling of magmas.
9. At F location metamorphic rock formation is more preffered because of the high pressure due to subduction whereas at B pressure and temperature is less. So there is less chance to get metamorphic rock at B location.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.