adjective (a)

• not deposited in layers(adj.all)

  Example:
  Glacial till is unstratified.
  

  Antonym:
  bedded, stratified
  

  source: wordnet30
• Not stratified; -- applied to massive rocks, as granite, porphyry, etc., and also to deposits of loose material, as the glacial till, which occur in masses without layers or strata.(adjective)

  source: webster1913