Red-bed sequence of sandstone, siltstone, argillite, and conglomerate that grades upward into highly fossiliferous brown sandstone and brownish-gray siltstone. Thickness is more than 2,000 m. Mapped only in the Healy and Mount McKinley quadrangles, unit is part of the Chulitna sequence of Csejtey and others (1992) (see also unit TrPzvs). Red-bed sequence contains a few thin interbeds of brown fossiliferous sandstone, pink to light-gray dense limestone, and intercalated basalt flows. Clasts in the red beds are dominantly basalt cobbles and pebbles derived from underlying basalt and from flows within the sequence. Quartzite pebbles and flakes of white mica and red radiolarian chert pebbles and grains are present in subordinate amounts. Fossils indicate a Late Triassic and Early Jurassic age. Also includes thin- to medium-bedded, brown-weathering calcareous sandstone, sandy limestone, and argillite. Unit is locally phosphatic and fossiliferous and contains ammonites of Sinemurian (Early Jurassic) age (Blodgett and Clautice, 2000)