Geologic Resources Inventory National Park Service U.S. Department of the Interior Simplified Geologic Map of Crater Lake NP QTnwa North 02.55 Qg Kilometers 230 138 Miles 0 2.5 5 QTnwba QTnwba Hmcri Qsm QTcin D E Qal S Qsm E Qcyba Hmcri R North Entrance Road T R ID G QTnwba Qg E QTcmvd E QTcmvd Hmcpf G Hmcpf D I QTnwba Timber Crater R 7424ft QTcmvd T 2263m E N QTnwba CR ES C Hmcri QTnwba PUMICE DESERT QTnwba Qg Red Cone Hmcri 7363ft 2245m Grouse Hill 7412ft Hmcri 2260m Hmcp Hmcp Hmcfi Llao Rock 8049ft 2453m E (o a p st en s Rim u D Qer Qg mm er r i o n v l S y e F Hmpa ) F U L B Qsm Merriam Cone T T Hillman Peak -486ft O -148m C Hmcri 8151ft S 2484m Qsm Hmcp The Watchman Hmcri 8013ft Hmcfi 2442m WIZARD ISLAND 6940ft Crater Lake 2116m Hmcri Hmpa Qg Hmpa QTnwba Qg W ( Hmcfi o e MOUNT SCOTT p s Hmcfi e t (highest point in park) n Qsm Qg 8929ft s R u i 2721m m m Rim Village m e D r Qg o r n iv ly e Hmcp ) Qg Park Headquarters Applegate Peak 8126ft Visitor Center 2477m Hmcri Qmea Hmcri Hmcfi Hmcp Qg 62 Qmed Qg Qg Hmcp P IN N A C Qg L Mazama Village E T V HE A Hmcfi P LL INN E Hmcri AC Y Hmcri LES Crater Peak Qswba 7263ft 2214m Qea Qswba Hmcri Union Peak Qg 7709ft 2350m Hmcfi Hmcfi Hmcp Hmcri Qg Qer Qswba PUMICE 62 FLAT Qg Qmer QTnwba 232 QTeba QTeba Qmer Hmcri Qg QTnwba Qswba Hmu Qg QTswa Hmcri Qea Qswba Qg QTswa QTeb QTeb Full Extent of Digital Data, Area of Detail in Red NPS Boundary Hmcwt Mount Mazama climactic eruption, Wineglass Welded Tuff of Williams (1942) Hmcpf Mount Mazama climactic eruption, pumice-flow deposits Infrastructure Qmer Mount Mazama preclimactic eruption, rhyodacite 138 Points of Interest Qmed Mount Mazama preclimactic eruption, dacite Roads Qmeba Mount Mazama preclimactic eruption, basaltic andesite Linear Dikes Qmea Mount Mazama preclimactic eruption, andesite 230 Mount Mazama and Regional Volcanism units QTswb Southwest volcanism (Cascades), basalt dk - Unidentified dikes, known or certain QTswa Southwest volcanism (Cascades), andesite Simplified Geologic Units 97 NOTE: This simplified geologic map compiled hundreds Qswba Southwest volcanism (Cascades), basaltic andesite 209 Qal Alluvial deposits of map units from the source maps into 36 categories. Qswa Southwest volcanism (Cascades), andesite The volcanic rocks were grouped by volcano and then by Qsm Slope movements rock type. Mount Mazama deposits were further QTnwba Northwest volcanism (Cascades), basaltic andesite differentiated by preclimactic, climactic, or postclimactic. 62 Qg Glacial deposits QTnwb Northwest volcanism (Cascades), basalt Non-volcanic rocks and deposits were grouped into 232 Qs Undivided sediments major categories: alluvial, slope movements, glacial, and QTnwa Northwest volcanism (Cascades), andesite Hl Lake deposits lake deposits; diatomite and volcaniclastic sediments; submerged caldera walls; and undivided sediments. Qea East volcanism (Cascades), andesite scw Submerged caldera walls QTeb East volcanism (Cascades), basalt North 0510 Tdvs Diatomite and volcaniclastic sediments QTeba East volcanism (Cascades), basaltic andesite Miles Hmpr Mount Mazama postclimactic dome, rhyodacite, lava and breccia Kilometers Qer East volcanism (Cascades), rhyodacite 0510 Hmpa Mount Mazama postclimactic eruption andesites QTed East volcanism (Cascades), dacite This map is an overview of compiled geologic data prepared as part of the NPS Geologic Resources Inventory. It is not a substitute for Smith, J.G. Page, N.J. Johnson, M.G. Moring, B.C. and Gray, F. 1982. Preliminary Geologic Map of the Medford 1 by 2 Hmu Mount Mazama deposits, undivided Qcyba Cascades volcanism, younger basaltic andesite site-specific investigations. degree Quadrangle, Oregon and California (1:250,000 scale). Open-File Report OF-82-955. U.S. Geological Survey. The source map used in creation of the digital geologic data was: As per source map scale and U.S. National Map Accuracy Standards, geologic features represented here are within 12 Hmcfi Mount Mazama climactic eruption, fine-grained lithic- and crystal-rich ignimbrite m (40 ft) (1:24,000 scale data), 51 m (166) ft (1:100,000 scale data), 63 m (203) ft (1:125,000 scale data), or 127 m Qcv Cascades volcanism, cinder cone and fissure vent deposits Bacon, C.R. 2008. Geologic Map of Mount Mazama and Crater Lake Caldera, Oregon (1:24,000 scale). Scientific Investigations Map (416) ft (1:250,000 scale data) of their true location. SIM-2832. U.S. Geological Survey. Hmclb Mount Mazama climactic eruption, lithic breccia QTcmvd All digital geologic data and publications prepared as part of the Geologic Resources Inventory are available at the NPS Cascades volcanism, mafic vent deposits Jenks, M.D. and others. 2008. Oregon Geologic Data Compilation v4 (OGDC) (1:100,000 scale). Integrated Resource Management Applications Portal (IRMA): https://irma.nps.gov/App/Reference/Search. Enter “GRI” as the search text and select a park from the unit list. Hmcri Mount Mazama climactic eruption, ring-vent-phase ignimbrite QTcin Cascades volcanism, intrusive rocks and dikes MacLeod, N.S. and Sherrod, D.R. 1992. Reconnaissance Geologic Map of the West Half of the Crescent 1 by 2 degree Quadrangle, Central Oregon (1:250,000 scale). Miscellaneous Investigations Series Map I-2215U.S. Geological Survey. Hmcp Mount Mazama climactic eruption, Plinian and other Holocene pumice-fall deposits Sherrod, D.F. 1991. Geologic Map of a Part of the Cascade Range between latitudes 43 degrees -44 degrees, Central Oregon (1:125,000 scale). Miscellaneous Investigations Series Map I-1891. U.S. Geological Survey..