Alaskan Volcano Investigations Report No. 1-2, Issue 2 |
Contents
The need for Aleutian volcano research | 3 |
Abstract | 57 |
ILLUSTRATIONS | 72 |
1 other sections not shown
Common terms and phrases
Adak Island agglomerate Aleutian arc Aleutian Islands altitude andesite Andrew Bay Ashishik augite basalt basalt flows beds Belkofski boulders breccia caldera floor caldera walls cinder cones composite cone Crater Creek basalt Crater Creek Gorge deposits dips dissected dome Dushkin east exposed feet thick Finger Bay rocks Finger Bay volcanics flank Fort Glenn fragments fumaroles gases Geyser glacial glaciers groundmass hornblende hot springs hypersthene Idak interbedded Kanaga Island Kanaga Volcano Lagoon late Tertiary lava flows magnetite mapped miles moraine Mount Adagdak Mount Kanaton Mount Moffet Mount Okmok Mount Tulik mudflows northern Adak Island Okmok ash Okmok caldera Okmok Volcano olivine parasitic cone Pavlof area Pavlof Volcano percent phenocrysts plagioclase postcaldera present probably pumice pyroclastic Quaternary ridge Sand Bay seismographs Sitkin Creek Sitkin Island slopes of Okmok streams summit surface Tanak volcanics temperature terraces tuff tuff-breccia Umnak Island valley vent volcanic activity volcanic rocks