Prograding d elta deposits differ from turbidity current deposits because ____.
A) delta deposits coarsen upwards, with fine sediments on bottom and coarse sediments on top
B) turbidity current deposits coarsen upwards, with fine sediments on bottom and coarse sediments on top
C) delta deposits fine upwards, with coarse sediments on bottom and fine sediments on top
D) deltas are not subject to marine processes
E) turbidity currents are not subject to marine processes

Question

Quizplus · Accepted Answer

Prograding delta deposits coarsen upwards, with fine sediments on the bottom and coarse sediments on top. This is due to the way deltas build out into the water and deposit sediments in layers, with coarser sediments being deposited closer to the main channel and finer sediments being deposited further away. Turbidity currents deposits also coarsen upwards, but they are not related to delta deposits, and can be found in a variety of marine environments. Therefore, option B is incorrect. Option C is also incorrect as delta deposits do not fine upwards. Options D and E are incorrect as they provide incorrect information about deltas and turbidity currents being marine processes.

Prograding D Elta Deposits Differ from Turbidity Current Deposits Because