diachronous

• a word derived from diachronism.
  diachronism

  noun

  geology the passage of a geological formation across time planes, as occurs when a marine sediment laid down by an advancing sea is noticeably younger in the direction of advancement

More Suggestions

• metachronous
• diachronic
• diachronism
• diachrony
• diaphanous
• isochronous
• synchronous
• asynchronous
• homochronous