poromata

/ˌpɒroʊˈmɑːtə/ (por-oh-MAH-tah)

Definitions

1. noun

A type of sedimentary rock formed from the compression of volcanic ash and other materials.

“The geologists discovered a new layer of poromata in the ancient riverbed.”

Synonyms

  • sedimentary rock
  • volcanic rock

Antonyms

  • igneous rock
  • metamorphic rock