The Cheakamus Valley basalts are part of what southwestern British Columbia formation?
Cheakamus Valley basalts The Cheakamus Valley basalts are a sequence of basaltic lava flows along 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.
Kingsvale Formation The Kingsvale Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Cretaceous period.