Hogg Rock
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Hogg Rock is a tuya volcano and lava dome in the Cascade Range of northern Oregon, United States, located close to Santiam Pass. Produced by magma with an intermediate andesite composition, it has ste
Hogg Rock Santiam Pass Oregon
Hogg Rock, Three Fingered Jack, Mount Jefferson, and U.S. 20 near Santiam Pass
Tuya
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A tuya is a flat-topped, steep-sided volcano formed when lava erupts through a thick glacier or ice sheet. They are rare worldwide, being confined to regions which were covered by glaciers and had act
Hogg Rock
…Hogg Rock is a tuya volcano and lava dome in the Cascade Range of northern Oregon, United States, located close to Santiam Pass. Produced by magma with an intermediate…
Herðubreið, a tuya in Iceland
The Table, British Columbia