Denison

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From Smithsonian Institution, online database, accessed December 8, 2003: "Mount Denison lies near the head of the Serpent Tongue, Hook, and Hallo glaciers NE of Snowy volcanoA vent in the surface of the Earth through which magma and associated gases and ash erupt; also, the form or structure (usually conical) that is produced by the ejected material.. This poorly known section of Katmai National Park contains a cluster of four closely spaced and mostly ice-covered ventAn opening in the Earth's surface through which magma erupts or volcanic gases are emitted.s. Mount Denison lies at the SW end of this volcanic chain, which also includes Steller, Kukak, and Devils Desk volcanoes. Orientation of lavaLava is the word for magma (molten rock) when it erupts onto the Earth's surface. Geologists also use the word to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, lava bombs or blocks). Lava is from the Italian word for stream, which is derived from the verb lavare--to wash. flows and a thick cross-bedded tephraAny type of rock fragment that is forcibly ejected from the volcano during an eruption. deposit suggest that a vent is located near Mount Denison (Swanson, in Wood and Kienle 1990). The precise age of the most recent activity at Denison is not known, but the volcano was considered to have been active during the HoloceneA geologic time designation for the last 10,000 years of Earth history. (Nye et al., 1998)."