postvolcanic

Adjective

postvolcanic (not comparable)

1. Following the eruption of a volcano, or after a period of volcanism.
   • In view of the above considerations, it seems reasonable, in endeavoring to find a line of demarcation, as indicated by fossil remains, somewhere in the gravel and volcanic series, to inquire what is positively known to have been found in strata lying undisturbed under the basalt; or, at least, so...1880, Josiah Dwight Whitney, The Auriferous Gravels of the Sierra Nevada of California, page 243
   • The Tertiary deposits would greatly facilitate the recognition of any such faults of considerable throw, and I think the probability very slight that the slopes shown in the sections are to any noticeable degree influenced by such postvolcanic disturbances.1892, Waldemar Lindgren, “Two Neocone rivers of California”, in Bulletin of the Geological Society of America, volume 4, page 268