progradation

/proh-grey-dey-shuhn/US // ˌproʊ greɪˈdeɪ ʃən //

蜕变,降级,升级,升华

Definitions

n.名词 noun

1
Geology.
- : seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.