Briefly discuss the formation of an accretionary wedge
What will be an ideal response?
Answer: During an oceanic-continental convergence event, the subducting ocean slab scraps along the landward side of the trench piling up sediment from the land and scraping off sediment from the ocean floor. Small amounts of ocean crust, sedimentary rocks, and metamorphic rocks may also be included in the wedge.
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Buying a share of a local farmer's crop is an example of ____________________ agriculture.
Fill in the blank(s) with the appropriate word(s).
What do the two stars near the center of this block represent?
A) They represent the location of the earthquake.
B) The star at depth is the place where the earthquake is generated.
C) The star at depth is the hypocenter.
D) The star on the surface is the epicenter.
E) All of these are correct.
The Orinoco River drains lowlands primarily in
A. Brazil and Argentina B. Peru and Ecuador C. Colombia and Venezuela D. Argentina and Chile
The building block of the silicate minerals is called the ____________
a) silicon-oxygen tetrahedron b) aluminum-silicon tetrahedron c) silicon-oxygen octahedron d) aluminum-silicon octahedron e) none of these