Tectonic Unit: uKT Name: Trevor Description: interbedded calcareous and glauconitic sandstone and mudstone, betonitic shale and local ironstone lenses; also includes Dunvegan conglomerate, sandstone, siltstone and shale (uKTD); marine Formation: Foreland Belt luK Trevor, Monster uK Slater R., Boundary Cr., Eagle Plain, Dunvegan (uKTD) Age Range: Upper Cretaceous Maximum Age: 88.5 Ma Minimum Age: 65.0 Ma