Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'transtensional basin'?

A. Successor basins arise from shifting and merging of fore arc, back-arc and intra-arc basins. Basins or sequences that overlap terrane boundaries. [Wikipedia]
B. Back-arc basins (or retro-arc basins) are geologic features, submarine basins associated with island arcs and subduction zones. They are found at some convergent plate boundaries, presently concentrated in the Western Pacific ocean. [Wikipedia]
C. Transtension basins are oblique tensional environments where stretching takes place. [Wikipedia]
D. A forearc is a depression (basin) in the sea floor located between a subduction zone and an associated volcanic arc. It is typically filled with sediments from the adjacent landmass and the island arc in addition to trapped oceanic crustal material. [Wikipedia]

Answer: Transtension basins are oblique tensional environments where stretching takes place. [Wikipedia]