Abstract The Morrison Formation is a laterally extensive terrestrial deposit representingan ecologically diverse assemblage of paleoenvironments from the Late Jurassic ofwestern North America. Although the Morrison Formation has recently been interpretedas a semiarid lowland savannah on the basis of geological and paleobiologicalindicators, many microenvironments within this system are more consistent with newinterpretations of the Morrison as a ground-water dominated “wetland” deposit. Herewe report new fossils from a little-studied exposure of the Morrison Formation in andaround Temple Canyon Park near Cañon City, Colorado. The Temple Canyon sectionshows a relatively thin sequence of conglomerate, sandstone, siltstone, mudstone, andlimestone beds representing alluvial to fluvial and possibly lacustrine deposition. Thesection rests on Precambrian basement and is unconformably overlain by the LowerCretaceous Lytle Formation. The mudstone and limestone beds preserve an abundantfossil flora and fauna distinct from those previously described from the MorrisonFormation. The floral assemblage includes species of algae, bryophytes, ferns, ginkgophytes,horsetails, cycads, bennettites, and conifers; together these plants indicatea warm climate with abundant local water supply. The faunal assemblage containsostracodes, conchostracans, traces of aquatic insect larvae, a terrestrial insect bodyfossil, prosobranch and pulmonate gastropods, many species of fish, a possible frog,and rare turtle remains. The presence of prosobranch gastropods, fish, and aquaticinsect larvae suggests a perennial water body with high oxygen content, while thepresence of conchostracans and pulmonate gastropods may indicate some fluctuationin water quality. Keywords: Morrison Formation, Jurassic, Cañon City, Colorado, paleoecology.

Abstract The trip begins at the Doubletree Hotel in downtown Salt Lake City, heads south to historic Midvale, west to Lark, and then begins a field tour of the Bingham mining district and Kennecott Utah Copper's Bingham Canyon porphyry copper mine (Fig. 1). The trip returns through Lark and then north past the Copperton concentrator, Barneys Canyon gold mine, Utah Copper's tailings impoundment, North Concentrator, and the smelter and refinery complex. The first 10.2 miles of this road log may be used for Day One: Central Wasatch Mountain field trip (John, 1997) and the first 20.6 miles will also be used for the Day Three: Barneys Canyon and Melco gold mine tours (Austin and Gunter, 1997). This road log is modified from logs prepared by Hunt (1933), Smith and James (1961), Bray and Wilson (1975), Shadrick et al. (1991), and Krahulec (1995). Assistance in the preparation of this log was provided by Steve Richardson, Mary Jo Sweeney, Geoff Ballantyne, Bill Stockdale, Richard Rubright, Richard Warnick, and Jaren Swenson. 0.0 Exit Doubletree Hotel parking lot at 215 South Temple, head north on West Temple, stay in the right hand lane. 0.1 Turn right, east, on 200 South, stay in the right hand lane. 0.2 Turn right, south, on Main Street, stay in the right hand lane. The Walker Building on this intersection, is named after a preeminent Utah pioneer family of mine promoters and bankers. The Walker brothers made the first shipment of base metal ores from the Bingham mining district -