LATE DEVONIAN SHELLY FOSSILS FROM THE JEFFERSON FORMATION, GRANDVIEW CANYON, EAST-CENTRAL IDAHO
Collected from a section stratigraphically below the reef, the samples were dissolved in hydrochloric acid and the fossils were separated and identified. Several of the fossils, including the brachiopods and corals, have been recorded in other locations throughout the Western United States and Canada. Others, like Hormospongia sp., are documented very sporadically and are found only in limited areas. Also found in this section are unique symbiotic growth patterns of the stromatoporoids, rugose, and tabulate corals. The dark dolomite layer and the excellent condition of the fossil preservation suggest a deep-water environment, the fore-reef. The collection of species indicate deposition during the Frasnian period.