Evidence of the Last Major Earthquake in the Cascadia Subduction

Evidence of the last major earthquake in the Cascadia subduction zone include ____________________.

A) disturbed sediments on the seafloor
B) sand layers washed far inshore by tsunami waves
C) repeating sequences of layers of soil in coastal marshes
D) all of these are correct.
E) only sand layers washed far inshore by tsunami waves and repeating sequences of layers of soil in coastal marshes