We lead one day long geotours on the Geoelements of Keweenaw Geoheritage.  These tours use ground and boat transportation and visit some of the most important places identified by the website.  We use the university research boat, the RV Agassiz. The trips from 2017 are described below. 2018 Trips will be announced here in early 2018.

Read press release about trip on July 28, 2016.

RV Agassiz at Rock Harbor
Keweenaw Geoheritage Field/Boat Trips--
July 22-26, 2017
July 22 Keweenaw Glacial Geology   Details
This trip is to see the glacial deposits of the Keweenaw and to understand the glacial history of the area. The Keweenaw was recently covered with more than two miles of ice, and the evidence for this is abundant, and all around us. We will visit local glacial features such as the esker near Mandan, moraine near Copper City and Calumet, glacial outwash in Hancock and Allouez, glacial grooves, erratic boulders, kettle lakes and kame terraces, using the boat traverses to see many of these features from the water. The glacial history and how the lake has evolved since glacial retreat has had a strong influence on our landscapes.

July 24 Lavas and the Keweenaw Rift   Details
This trip is to see and understand the Keweenaw’s black rocks and its deep earth volcanism past. It is the site of Earth largest lava outpourings. Magma oceans existed here. We will see the huge lava flows and how they shape and influence the peninsula.
Highlights of the trip include: The Great lava reefs and shipwrecks of the Eagle Harbor to Copper Harbor shore, The Greenstone Flow (Earth’s Largest) and its anatomy, Copper and lavas--how do they relate? Manitou Island and the Lake Shore Traps.

July 25 Keweenaw Fault    Details
This trip is to see and 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.

July 26 Jacobsville Sandstone    Details
This trip is to see and understand the red rocks that were carried by rivers from the Huron Mountains (which were huge then) into the great valley of the Keweenaw rift. The best way is via the lake, where we will visit Pt Isabelle, Point Louis, Rabbit Island, Traverse Bays, Rabbit Bay and Jacobsville/Lower Entry.


David Wilheim

David Wilheim

David Wilheim