Abstract
The Canadian Cordillera is characterized by a long-lived geological history resulting from protracted interaction of oceanic plates and one large continent. Interpreted as a “collage” orogen, it contains terranes of oceanic affinity separating volcanosedimentary blocks. Oceanic, radiolarian chert-bearing accreted terranes are important structural markers and age control of their sedimentary strata is fundamental to the understanding of a complex geological history. Synorogenic and postorogenic deposits contain radiolarian chert clasts, which allow correlations with strata in place. More interestingly, they also contain eroded strata that are unknown in the Cordillera. Radiolarians appear to be the key in the key in potential discovery of such missing elements of the geological record.
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