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Evolution of the early Oligocene Bonanza Caldera, Northeast San Juan volcanic field, Colorado.

Varga, Robert J; Smith, Brian M (1984) Evolution of the early Oligocene Bonanza Caldera, Northeast San Juan volcanic field, Colorado. JGR. Journal of Geophysical Research. B. 89; 10, Pages 8679-8694. 1984. .

AuthorsVarga, Robert J; Smith, Brian M
Year1984
TitleEvolution of the early Oligocene Bonanza Caldera, Northeast San Juan volcanic field, Colorado.
SourceJGR. Journal of Geophysical Research. B. 89; 10, Pages 8679-8694. 1984. .
PublisherAmerican Geophysical Union. Washington, DC, United States. 1984.
Document typeSerial; Conference-Document
ISSN0196-6936
GeoRef1985-038372
Keywordsabsolute-age; alkaline-earth-metals; Bonanza-Caldera; Bonanza-Tuff; breccia-; calderas-; Cenozoic-; clastic-rocks; Colorado-; dacites-; dates-; geochemistry-; geochronology-; igneous-rocks; isotopes-; K-Ar; lava-; lower-Oligocene; major-elements; metals-; O-18-O-16; Oligocene-; oxygen-; Paleogene-; petrology-; pyroclastics-; Rawley-Andesite; rhyolites-; Saguache-County-Colorado; San-Juan-volcanic-field; sedimentary-rocks; Sr-87-Sr-86; stable-isotopes; strontium-; subsidence-; Tertiary-; trace-elements; tuff-; United-States; volcanic-breccia; volcanic-features; volcanic-rocks; volcanism-; volcanology-
DOI10.1029/JB089iB10p08679

25 samples from this reference

Results Map Plot Download
SampleRock nameMajorTraceIsotope
1Andesite yesyes
2Andesite yesyes
3Dacite yesyes
4Dacite yesyes
5Dacite yesyes
6Dacite yesyes
7Dacite yesyes
8Dacite yesyes
9Dacite yesyes
10Dacite yesyes
11Dacite yesyes
12Dacite yesyes
13Dacite yesyes
14Dacite yesyes
15Rhyolite yesyes
16Rhyolite yesyes
17Rhyolite yesyes
18Rhyolite yesyes
19Andesite yesyes
20Andesite yesyes
21Andesite yesyes
RawlinsAndesite yes
Bonanza DAndesite yes
Bonanza RDacite yes
Upper ADacite yes