Mount Cayley volcanic field facts for kids
Quick facts for kids Mount Cayley volcanic field |
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 The Mount Cayley volcanic field
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| Country | Canada |
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| Province | British Columbia |
| District | New Westminster Land District |
| Part of | Garibaldi Volcanic Belt |
| Length | 31 km (19 mi) |
| Width | 6 km (4 mi) |
| Period | Pliocene-to-Holocene |
The Mount Cayley volcanic field is a volcanic area on the south coast of British Columbia, Canada. It is 31 kilometres (19 mi) long. The field gets its name from Mount Cayley, the biggest of several active volcanos in the area.
Most of the volcanoes there were created when material from inside the earth spilled onto the surface. Under the earth were layers of glacial ice from the last ice age. There are tuya—steep, flat-topped volcanoes—and lava domes. The first eruptions in the field occurred between 1.6 and 5.3 million years ago, and at least 23 eruptions have occurred in all.
The southern area has the most known volcanoes—11. The center of the field has at least five volcanoes, and the north has two volcanoes.
Images for kids
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Area of the Cascadia subduction zone, including the Cascade Volcanic Arc (red triangles). The Garibaldi Volcanic Belt is shown here as three red triangles at the northernmost end of the arc.
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Volcanic features of the MCVF and the ice-covered mountain ridge on which it lies. This image is approximately 35 km (22 mi) north–south.
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Southwestern flank of Mount Cayley. Its nearly vertical face has been the source for several landslides in the past.
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Mount Fee rising above adjacent mountainous terrain. This view of the mountain is from the south.
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Little Ring Mountain, the northernmost volcano in the MCVF. Like Ring Mountain to the south, the volcano gets its flat-topped, steep-sided structure from when magma intruded and melted a vertical pipe in the overlying Cordilleran Ice Sheet during the last glacial period.
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Mount Fee rising over the lightly glaciated dome of Ember Ridge North.
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The northern flank of Ring Mountain, a tuya at the northern end of the MCVF. Its flat-topped steep-sided structure has its origins from when magma intruded and melted a vertical pipe in the overlying Cordilleran Ice Sheet during the last glacial period.
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Brandywine Falls and at least three lava flows exposed in the rugged cliffs.
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Summit spires of the Vulcan's Thumb. Its craggy structure results from prolonged erosion.
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Mount Cayley as seen from its southeastern flank.
