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Lassen Volcanic National Park, California. Bumpass Hell, looking north 100 degrees west along the western fault. The dark rocks at the extreme left are basalt. The others are dacite. Bumpass Hell is 500 feet long and 200 feet wide, with numerous pools, fumaroles, and hot springs. The Largest spring seen along the eastern fault is on the right. The line between the dark basalt and the white altered dacite is a fault also and has considerable vigorous steam spring action. August 13, 1921.
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This dataset contains 8 data tables provided in csv format that contain sample location data, whole-rock geochemical data, argon-argon geochronologic data, sulfur, oxygen, and hydrogen isotope data, and mineralogical data from shortwave infrared spectrography (SWIR) and X-ray diffraction (XRD) analyses collected from igneous rocks on Brokeoff and Maidu volcanoes, northeastern California, USA. The data table files are Sample_Location_Data.csv, Argon_Data.csv, Geochemistry_Data.csv, SWIR_Data.csv, Whole_Rock_XRD.csv, Clay_XRD.csv, Sulfur_Isotope.csv, and Oxygen_Hydrogen_Data.csv. Fields in the data tables are defined in 8 corresponding data dictionaries, Sample_Location_Data_Dictionary.csv, Argon_Data_Dictionary.csv,...


    map background search result map search result map Bumpass Hell, looking north 100 degrees west along the western fault. Lassen Volcanic National Park, California. 1921. Geochemical and Geochronological Data for Hydrothermal Systems on Brokeoff Volcano and in the Maidu Volcanic Center, Lassen Peak area, northeastern California Geochemical and Geochronological Data for Hydrothermal Systems on Brokeoff Volcano and in the Maidu Volcanic Center, Lassen Peak area, northeastern California Bumpass Hell, looking north 100 degrees west along the western fault. Lassen Volcanic National Park, California. 1921.