When ignimbrite meets water: Megascale gas-escape structures formed during welding
Geology
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Abstract
Diverse welding, crystallization, and structural features develop when a hot ignimbrite encounters external water, depending largely on volatile-rock ratios. Such processes are spectacularly documented by a regional ignimbrite, where ponded within an older caldera in the San Juan Mountains, Colorado. Interaction of hot pyroclastic flows with moist underlying sediments or standing water in a stream valley or shallow-lakeshore environment produced mega-scale gas-escape structures, quenched adjacent tuff, inhibited welding, and generated nonplanar crystallization zones. This site provides a context for reviewing examples of ignimbrite-water interaction elsewhere.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | When ignimbrite meets water: Megascale gas-escape structures formed during welding |
| Series title | Geology |
| DOI | 10.1130/G45772.1 |
| Volume | 47 |
| Issue | 1 |
| Year Published | 2019 |
| Language | English |
| Publisher | Geological Society of America |
| Contributing office(s) | Volcano Science Center |
| Description | 4 p. |
| First page | 63 |
| Last page | 66 |
| Country | United States |
| State | Colorado |
| Other Geospatial | San Juan Mountains |
| Google Analytic Metrics | Metrics page |