The Trap Dike
Formed of softer material than the parent bedrock into which it has intruded, the Trap Dike has eroded into a deep, canyon-like notch in the side of Mt Colden. A climber's highway!
This image is from the presentation "Crampy Calves, Concrete Conditions: A Toilsome Climb of Mt Colden's Trap Dike".

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