Judith Fierstein
Judith Fierstein is a Research Geologist at the California Volcano Observatory
Science and Products
Filter Total Items: 26
Blue Mountain and the Gas Rocks: Rear-arc dome clusters on the Alaska Peninsula Blue Mountain and the Gas Rocks: Rear-arc dome clusters on the Alaska Peninsula
Behind the single-file chain of stratovolcanoes on the Alaska Peninsula, independent rear-arc vents for mafic magmas are uncommon, and for silicic magmas rarer still. We report here the characteristics, compositions, and ages of two andesite-dacite dome clusters and of several nearby basaltic units, all near Becharof Lake and 15 to 20 km behind the volcanic front. Blue Mountain consists...
Authors
Wes Hildreth, Judith Fierstein, Andrew T. Calvert
Geochronology and eruptive history of the Katmai volcanic cluster, Alaska Peninsula Geochronology and eruptive history of the Katmai volcanic cluster, Alaska Peninsula
In the Katmai district of the Alaska Peninsula, K–Ar and 40Ar/39Ar ages have been determined for a dozen andesite–dacite stratocones on the arc front and for 11 rear-arc volcanoes, 10 of which are monogenetic. Tied to mapping and stratigraphic studies, our dating emphasized proximal basal lavas that rest on basement rocks, in order to estimate ages of inception of each polygenetic cone...
Authors
Wes Hildreth, Marvin A. Lanphere, Judy Fierstein
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 26
Blue Mountain and the Gas Rocks: Rear-arc dome clusters on the Alaska Peninsula Blue Mountain and the Gas Rocks: Rear-arc dome clusters on the Alaska Peninsula
Behind the single-file chain of stratovolcanoes on the Alaska Peninsula, independent rear-arc vents for mafic magmas are uncommon, and for silicic magmas rarer still. We report here the characteristics, compositions, and ages of two andesite-dacite dome clusters and of several nearby basaltic units, all near Becharof Lake and 15 to 20 km behind the volcanic front. Blue Mountain consists...
Authors
Wes Hildreth, Judith Fierstein, Andrew T. Calvert
Geochronology and eruptive history of the Katmai volcanic cluster, Alaska Peninsula Geochronology and eruptive history of the Katmai volcanic cluster, Alaska Peninsula
In the Katmai district of the Alaska Peninsula, K–Ar and 40Ar/39Ar ages have been determined for a dozen andesite–dacite stratocones on the arc front and for 11 rear-arc volcanoes, 10 of which are monogenetic. Tied to mapping and stratigraphic studies, our dating emphasized proximal basal lavas that rest on basement rocks, in order to estimate ages of inception of each polygenetic cone...
Authors
Wes Hildreth, Marvin A. Lanphere, Judy Fierstein
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.