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UID:pretalx-nss-convention-2026-TPMWZW@talks.caving.dev
DTSTART;TZID=EST:20260710T090000
DTEND;TZID=EST:20260710T092000
DESCRIPTION:Volcanic activity beneath glacial ice can create rare cave envi
 ronments where focused heat from the underlying rock melts the overlying i
 ce faster than the ice can "squeeze" the caves shut. Thermal springs and f
 umaroles are the major drivers of glaciovolcanic cave formation. The origi
 n and shape of glaciovolcanic caves are intriguing\; they originate from a
 nd are shaped by variations in climate and volcanic heat flux. In some cas
 es\, the interaction between volcanic heat and glacial ice more broadly ca
 n cause hazards for nearby communities. Thus\, studies of glacier caves al
 low direct observations that can calibrate models of rates of glacial melt
  or movement\, bedrock weathering and transport\, and glacial outburst flo
 ods.\n\nInterplay between volcanic heat and glacial ice on Mount Baker\, W
 ashington State\, has created a dynamic cave environment in Sherman Crater
  present prior to volcanic unrest in 1975. A 2025 expedition leveraged spe
 cialized and international expertise to map more than 1.5 km of glaciovolc
 anic cave\, conduct drone-based photogrammetry\, collect thermal imaging s
 cans\, sample fumaroles and thermal springs for geochemistry\, and catalog
 ue the microbiology. Some in-cave streams are glacial melt and others with
  high conductivity are a mixture of glacial melt and volcanogenic waters.\
 n\nFumaroles exceed 90°C\, are high in hydrogen sulfide\, and have an iso
 topic profile consistent with a volcanic source. Geochemical syntheses\, i
 ncluding standard geothermometers\, reveal that waters in Sherman Crater a
 re from a different source than fault driven groundwater flow at nearby Ba
 ker Hot Springs\, which are different from non-thermal springs in surround
 ing carbonates\, metasediments\, and dunite.
DTSTAMP:20260826T232317Z
LOCATION:Auditorium
SUMMARY:Geologic Characterization of the Glaciovolcanic Caves of Mount Bake
 r\, Washington - 
URL:https://talks.caving.dev/nss-convention-2026/talk/TPMWZW/
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