Kokhanok 65 mi (105 km) NW Karluk 65 mi (104 km) SE Larsen Bay 71 mi (115 km) SE King Salmon 72 mi (117 km) NW Anchorage 250 mi (403 km) NE
DESCRIPTION
This feature is part of the Savonoski River Cluster of volcanoes, as defined by Hildreth and others (2004) [1]. From Hildreth and others (2004) [1]: "Rainbow River Cone (Peak 3980) is a small basaltic volcano (51.8-53% SiO2) perched on a basement ridge east of Rainbow River, 15 km NW of Mount Denison. The glacially sculpted cone, 1 km wide with 330 m relief, consists of radially dipping stacks of thin lavas and breccia sheets intercalated with scoria falls, well exposed on bounding cliffs, cut by numerous dikes, and gutted by a northerly cirque. Lavas and ejecta contain phenocrysts of plagioclase, orthopyroxene, clinopyroxene, olivine, and Fe-Ti oxides. An ice-scoured lava plateau (390 +/- 39 ka) extends 1 km SE from the cone."
Introduction
Operations
Response
Staff
Fields of Study
Geology
Summary
Color Code Definitions
Webcams
Webicorders
RSAM
Great Sitkin
Trident
Reference Search
Glossary
Recent Images
Browse Images
Bibliography
Snowy
List Display
Sound file
Hildreth, Wes, Fierstein, Judy, Siems, D. F., Budahn, J. R., and Ruiz, Joaquin, 2004, Rear-arc vs. arc-front volcanoes in the Katmai reach of the Alaska Peninsula: a critical apprasial of across-arc compositional variation: Contributions to Mineralogy and Petrology, v. 147, n. 3, p. 243-275.
