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Global Volcanism Program | Image GVP-10004

Hydrothermal alteration is extensive within the valley walls of a thermal area near the summit of Cerro Evermann. Gases rise from fumaroles in this 1998 view. The largest fumarolic vent is located at the head of a large barranca NE of the summit. During a 1957 visit by Mooser and Bryan, temperatures of 65-97°C were measured. Similar temperatures ranging from 61-101°C were measured in 1993. Photo by Martha Marin, 1998 (Mexican Navy).

Hydrothermal alteration is extensive within the valley walls of a thermal area near the summit of Cerro Evermann. Gases rise from fumaroles in this 1998 view. The largest fumarolic vent is located at the head of a large barranca NE of the summit. During a 1957 visit by Mooser and Bryan, temperatures of 65-97°C were measured. Similar temperatures ranging from 61-101°C were measured in 1993.

Photo by Martha Marin, 1998 (Mexican Navy).

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Keywords: hydrothermal alteration | geothermal | geothermal feature | fumarole | degassing | emissions


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