2017/01/01 by Charles R. Bacon, Julie M. Donnelly‐Nolan, Robert A. Jensen +1 · 1 citation
Environmental Science · Earth and Planetary Sciences · #Species Distribution and Climate Change #Atmospheric and Environmental Gas Dynamics #Geological Modeling and Analysis #Impact crater #Caldera #Geology #Volcano #Crater lake #Seismology #Volcanic arc #Volcanology #Mount #Quadrangle #Geomorphology #Tectonics #Subduction
paper · pdf · doi:10.3133/sir20175022j
openalex publication_date 2017/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/14
View east-northeast from Garfield Peak on the south rim of Crater Lake caldera. Peak on skyline is 8,929 feet (2,722 meters) Mount Scott, an ~420 thousand years before present (ka) dacite stratovolcano considered to be part of Mount Mazama, the volcano that collapsed during the caldera-forming eruption ~7,700 years ago. The caldera walls in this view expose Mazama lava flows and fragmental deposits from as old as ~400 ka at Phantom Cone, adjacent to tiny Phantom Ship island, to as young as ~27 ka at Redcloud Cliff, the V-shaped face at the top of the wall left of center. The beheaded glacial valley of Kerr Notch, the low point on the caldera rim, is seen between Phantom Ship and Mount Scott. Photograph by Carly McLanahan.