| Abstract: | Medicine Lake volcano forms a broad, seemingly nondescript highland, as viewed from any angle on the ground. Seen from an airplane, however, treeless lava flows are scattered across the surface of this potentially active volcanic edifice. Lavas of Medicine Lake volcano, which range in composition from basalt through rhyolite, cover more than 2,000 km2 east of the main axis of the Cascade Range in northern California. Across the Cascade Range axis to the west-southwest is Mount Shasta, its towering volcanic neighbor, whose stratocone shape contrasts with the broad shield shape of Medicine Lake volcano. Hidden in the center of Medicine Lake volcano is a 7 km by 12 km summit caldera in which nestles its namesake, Medicine Lake. The flanks of Medicine Lake volcano, which are dotted with cinder cones, slope gently upward to the caldera rim, which reaches an elevation of nearly 8,000 ft (2,440 m). The maximum extent of lavas from this half-million-year-old volcano is about 80 km north-south by 45 km east-west. In postglacial time, 17 eruptions have added approximately 7.5 km3 to its total estimated volume of 600 km3, and it is considered to be the largest by volume among volcanoes of the Cascades arc. The volcano has erupted nine times in the past 5,200 years, a rate more frequent than has been documented at all other Cascades arc volcanoes except Mount St. Helens. |
| Genre: | USGS Numbered Series |
| ProdID: | 99100 |
| Citation Author: | Donnelly-Nolan, Julie M. |
| Citation Contributing Office: | Volcano Science Center - Menlo Park |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0420000 |
| Citation LatS: | 0413000 |
| Citation LonE: | -1211500 |
| Citation LonW: | -1215000 |
| Citation Month: | |
| Citation No Pagination: | N |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | PDF Pamphlet: ii, 48 p.; 2 Sheets; Sheet 1: 58 inches x 41.3 inches; Sheet 2: 58 inches x 40.5 inches; Database site |
| Citation Projection: | |
| Citation Public Comments: | This report will also soon be available in print with a CD-ROM |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 2927 |
| Citation Search Results Text: | Geologic map of Medicine Lake volcano, northern California; 2011; SIM; 2927; Donnelly-Nolan, Julie M. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 2011 |
| Type: | citation/reference |
| Text: | Geologic map of Medicine Lake volcano, northern California; 2011; SIM; 2927; Donnelly-Nolan, Julie M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/sim_2927.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/2927/ |
| Date Other: | Thu, 17 Mar 2011 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
