Title: Conodont faunas and Upper Triassic stratigraphy, Trutch map area, northeastern British Columbia
Abstract: Archival Triassic conodont collections from Trutch map area (NTS 94 G) are documented as part of the Central Foreland NATMAP Project. Two Ladinian collections come from the Toad Formation but all others come from Upper Triassic Baldonnel and Pardonet formations. The discrimination of Upper Triassic units is problematic in the eastern foothills where the character of the Pardonet Formation differs from that in its type area on Williston Lake. The base of the Pardonet Formation is a transgressive surface that generally approximates the Carnian-Norian boundary. In central Trutch map area, the Pardonet Formation includes Lower to lower Middle Norian cliff-forming limestones that have been confused with both the Baldonnel and Bocock formations. These Pardonet Formation carbonates largely predate the informal unit P4 in the Sukunka region subsurface, and are believed to have developed in relatively shallow water during a lowstand that preceded a Middle Norian transgression. Both Norian flooding events are marked by abundant Norigondolella.