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- Q5088823 subject Q8481289.
- Q5088823 subject Q8708604.
- Q5088823 subject Q8766842.
- Q5088823 abstract "The Cheakamus Valley basalts are a sequence of basaltic lava flows at the Cheakamus River in southwestern British Columbia, Canada. They are part of the Garibaldi section of the Cascade Volcanic Arc and were produced during an episode of volcanic eruptions from an unknown vent. The latest basaltic eruption deposited wood in lacustrine sediments under the lava flows that have been dated 34,200 ± 800 years old. These youngest lavas form isolated ridges above the older glaciated Cheakamus Valley basalts and were described as "esker-like" by Canadian volcanologist Bill Mathews. Columnar jointing is present all through the most recent basalt lava flow and pillow basalts exist in the lowermost unit, portions of which are underlain by hyaloclastite breccia. Bill Mathews suggested that these esker-like lava flows were deposited during subglacial eruptions that traveled away from the vent inside tunnels or trenches melted in the overlying ice sheet. Mathews based his suggestion on the age of the underlying till, the existence of pillow lava close to the bottom of some lavas that indicate subaqueous volcanism, horizontal jointing at the edges of the lavas that indicate rapid cooling, and the absence of apparent paleotopography to explain these features.".
- Q5088823 thumbnail BrandywineFalls_1200W.jpg?width=300.
- Q5088823 wikiPageWikiLink Q15427433.
- Q5088823 wikiPageWikiLink Q16.
- Q5088823 wikiPageWikiLink Q17118379.
- Q5088823 wikiPageWikiLink Q1974.
- Q5088823 wikiPageWikiLink Q2741433.
- Q5088823 wikiPageWikiLink Q43338.
- Q5088823 wikiPageWikiLink Q4910050.
- Q5088823 wikiPageWikiLink Q5523303.
- Q5088823 wikiPageWikiLink Q610781.
- Q5088823 wikiPageWikiLink Q769008.
- Q5088823 wikiPageWikiLink Q8481289.
- Q5088823 wikiPageWikiLink Q8708604.
- Q5088823 wikiPageWikiLink Q8766842.
- Q5088823 wikiPageWikiLink Q964204.
- Q5088823 comment "The Cheakamus Valley basalts are a sequence of basaltic lava flows at the Cheakamus River in southwestern British Columbia, Canada. They are part of the Garibaldi section of the Cascade Volcanic Arc and were produced during an episode of volcanic eruptions from an unknown vent. The latest basaltic eruption deposited wood in lacustrine sediments under the lava flows that have been dated 34,200 ± 800 years old.".
- Q5088823 label "Cheakamus Valley basalts".
- Q5088823 depiction BrandywineFalls_1200W.jpg.