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Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico
Abstract Upper Tertiary and Quaternary volcanic roc
Upper Tertiary and Quaternary volcanic rocks of the Jemez Mountains are subdivided into three groups the Keres Group, in the south, the Polvadera Group, mainly in the north, and the Tewa Group, in the central and flanking parts of the mountains. The Keres Group is divisible informally into two subgroups an older subgroup, consisting of the basalt of Chamisa Mesa and the Canovas Canyon Rhyolite, and a younger subgroup, consisting of the Paliza Canyon Formation and the Bearhead Rhyolite. The older subgroup is a basalt-rhyolite association; the younger subgroup is a more differentiated basalt-andesite-dadte-rhyolite association. The Polvadera Group includes the Lobato Basalt; the andesites, dacites, and quartz latites of the Tschicoma Formation; and El Rechuelos Rhyolite. These formations constitute a still younger basalt-andesite-dacite-rhyolite association in the Jemez Mountains. The Tewa Group includes the Bandelier Tuff, Cerro Rubio Quartz Latite, Cerro Toledo Rhyolite, and the Valles Rhyolite and represents the climax of rhyolitic volcanism in the Jemez Mountains. Subdivision of the Bandelier Tuff is revised so that it consists of only two members the Otowi Member, which includes the Guaje Pumice Bed, and the Tshirege Member, which includes the Tsankawi Pumice Bed. The Valles Rhyolite is subdivided into six new members. Ages of many of the formations are refined by radiometric dating.
mations are refined by radiometric dating.  +
Author Roy A. Bailey  + , Robert Leland Smith  + , Clarence Samuel Ross  +
Citation Roy A. Bailey,Robert Leland Smith,Clarence Samuel Ross. 1969. [[Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico]]. Washington D.C.: U.S. Geological Survey. 19p.  +
Document type Book  +
Foaf/Page http://pubs.er.usgs.gov/publication/b1274P  +
Link http://pubs.er.usgs.gov/publication/b1274P  +
Name Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico  +
PublicationDate 1969  +
Publisher U.S. Geological Survey  +
ReferenceGenre Geothermal  +
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Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico + , Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico + , Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico + , Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico + , Stratigraphic Nomenclature of Volcanic Rocks in the Jemez Mountains, New Mexico +
Categories References , Geothermal References , Reference Materials
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Fenton Hill HDR Geothermal Area + , Valles Caldera - Redondo Geothermal Area + , Valles Caldera - Sulphur Springs Geothermal Area + ReferenceForBaileySmithRoss1969
Field Mapping At Valles Caldera - Redondo Geothermal Area (Bailey, Et Al., 1969) + , Field Mapping At Valles Caldera - Sulphur Springs Geothermal Area (Bailey, Et Al., 1969) + Reference material
 
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