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Mygatt-Moore Quarry
ASSESSING PALEOECOLOGICAL DATA RETENTION AMONG DISPARATE FIELD COLLECTION REGIMES: A CASE STUDY AT THE MYGATT-MOORE QUARRY (MORRISON FORMATION) Available to Purchase
Regional map showing location of the Mygatt-Moore Quarry. Available to Purchase
Example of bone fragments collected from Mygatt-Moore Quarry that would fal... Available to Purchase
New Chemical Abrasion Thermal Ionization Mass Spectrometry Dates from the Brushy Basin Member, Morrison Formation, Western Colorado: Implications for Dinosaur Evolution Available to Purchase
SIGNIFICANCE OF A SMALL REGURGITALITE CONTAINING LISSAMPHIBIAN BONES, FROM THE MORRISON FORMATION (UPPER JURASSIC), WITHIN A DIVERSE PLANT LOCALITY DEPOSIT IN SOUTHEASTERN UTAH, USA Available to Purchase
A chronostratigraphic framework for the Upper Jurassic Morrison Formation, western U.S.A. Available to Purchase
First Fossil Orthoptera from the Jurassic of North America Available to Purchase
Ancient Basidiomycota in an extinct conifer-like tree, Xenoxylon utahense , and a brief survey of fungi in the Upper Jurassic Morrison Formation, USA Open Access
The Late Jurassic Cleveland-Lloyd Dinosaur Quarry as a Drought-Induced Assemblage Available to Purchase
DEPOSITIONAL CONSTRAINTS ON THE LOWER CRETACEOUS STIKES QUARRY DINOSAUR SITE: UPPER YELLOW CAT MEMBER, CEDAR MOUNTAIN FORMATION, UTAH Available to Purchase
Skin impressions of the last European dinosaurs Available to Purchase
Denver’s deepest dinosaur Open Access
Plants, fish, turtles, and insects from the Morrison Formation: A Late Jurassic ecosystem near Cañon City, Colorado Available to Purchase
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.