Howlock Mountain is a heavily eroded

shield volcano A shield volcano is a type of volcano named for its low profile, resembling a shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava ...

in the

Cascade Range The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington (state), Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as m ...

of central

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

, located along the Cascade Crest just north of Mount Thielsen.

Ice Age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and g ...

glaciers A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires ...

eroded away most of the flanks of the volcano, leaving numerous deep

cirques A (; from the Latin word ) is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from , meaning a pot or cauldron) and ; ). A cirque may also be a similarly shaped landform arising from fluvi ...

surrounding a central ridge capped by several

horns Horns or The Horns may refer to: * Plural of Horn (anatomy) * Plural of Horn (instrument), a group of musical instruments all with a horn-shaped bells * The Horns (Colorado), a summit on Cheyenne Mountain * Horns (novel), ''Horns'' (novel), a dar ...

. The summit of Howlock Mountain lies along the border between Douglas County and Klamath County.

References

External links

* * Shield volcanoes of the United States Subduction volcanoes Cascade Volcanoes Volcanoes of Oregon Mountains of Oregon Landforms of Douglas County, Oregon Mountains of Klamath County, Oregon Umpqua National Forest Mountains of Douglas County, Oregon Volcanoes of Klamath County, Oregon {{KlamathCountyOR-geo-stub

References

Further reading

External links