Thick blocks of crust carried toward a subduction zone ________.
A)can get sliced off the descending slab and transferred to the accretionary continental margin as an accreted terrane
B)cause the subduction zone to stop or reverse and begin subducting the other way
C)get eroded, contributing a greater than usual volume of sediments to the trench at that point
D)get uplifted to become an island on the oceanward side of the trench

Question

Quizplus · Accepted Answer

Thick blocks of crust carried toward a subduction zone can become accreted terranes by getting sliced off the descending slab and transferred to the accretionary continental margin. This process contributes to the growth of continents over time. The other options (B, C, and D) are not typical outcomes of the subduction of thick crustal blocks.

Thick Blocks of Crust Carried Toward a Subduction Zone ________