Tectonic Unit: JKPA Name: Parsons Description: shale, siltstone, sandstone derived mainly from south and southeast, deposited on broad northeast-trending continental shelf; fluvial and deltaic sandstone in Mackenzie Delta; marine and nonmarine Formation: Foreland Belt Arctic Alaska Terrane lK Kongakut JK Kingak Age Range: Upper Jurassic - Lower Cretaceous Maximum Age: 157.1 Ma Minimum Age: 97.0 Ma