active sedimentary association的用法和样例：
- From Chang 3 to Chang 2 stage, sedimentary distribution on surface and sedimentary association on cross section showed a characteristic durative propagation and stepwise overlap toward delta plain.
- sedimentary association of strata
- The orient has been playing an active role in the world economy.
- He is an active member of the school's stamp club.
- An active volcano may explode at any time.