Church Mountain Landslide field trip

A field trip to the features of the humongous Church Mountain Landslide near the bustling town of Glacier in the North Fork Nooksack River is now published in the “Field Trips Page” of this website. The 2400-year-old landslide deposit in the valley bottom is about 6 miles long, up to 300 feet (95 m) thick in its upper reaches, and has a calculated volume of 2.83 x 10^8 cubic meters (that’s 283 million cubic meters, or 368 million cubic yards, or 0.06 cubic miles). There is no snow anywhere near Glacier this winter, so you could examine the landslide deposit and see the huge scar left behind even now. A more detailed description of this landslide and discussion of landslide dynamics is planned for the guidebook I’m writing to geological sites in Western Washington. More on that later.

Dave Tucker

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