FaultDetails15

Keweenaw Geoheritage Field/Boat Trips--
July 23, 2019

Keweenaw Fault
This trip is to see some highlights and to begin to understand the Keweenaw Fault, a massive thrust fault which was the locus of hundreds of high magnitude earthquakes and which split the peninsula lengthwise and uplifted rocks, including copper, to a place where people could find it.
We will visit the Fault along the Keweenaw shore at Keweenaw Point and Bete Grise and then Mt Bohemia, Gratiot Lake, Trap Rock Valley, the Natural Wall, Hungarian Falls, and the Pilgrim River Valley. Click on Green words below for more content.

What’s included: Van and Boat transport and lunch. No overnight costs covered. Vans may be joined in Houghton one hour before the meeting time and transport back to Houghton from the end point each day is available to those who want/need it.

Visiting Expert: Dr James DeGraff
8:30 am: meet at Haven Falls.
9:30 am: Board Agassiz at Lac la Belle Marina, visit High Rock Bay and Keystone Bay (Mesquite Wreck), return past Fish Cove and Mt Houghton to Bete Grise. Use proton precession magnetometer below Bare Bluff to trace Keweenaw Fault along lake bottom. Continue to Bete Grise Landing. Arrive ~12:30.
12:30 pm: Lunch at Bete Grise Beach.
1:15 pm: To Lake Gratiot area. Drive to Old Colony Road, and walk to Natural Wall Ravine (0.1 miles in forest--feet may get wet!)
3:30 pm: Hungarian Falls and the Fault. (Walk 0.4 miles, easy but possible wet feet!)
4:30 pm Hapapuura Rd and Pilgrim River fault sites

What to bring: Several layers for wind and cold conditions, possible rain? But it could be warm also! Strong sneakers or light hikers for shoes. Camera! Good spirits. Questions.

Steve Trynoski

Steve Trynoski

Steve Trynoski

Bare Bluff