2455 Old Penitentiary Road

Boise, ID 83712 (Next to the Old Pen)

Current Hours

IMMG has opened for the season. Saturday only 12-5.

Free Admission!

Tours and other programs available.

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July 2021

Terry Maley Lecture: How the Yellowstone Hotspot Dominated Northwest Geology for 56 Million Years

July 11 @ 1:00 pm - 3:30 pm

The presentation will begin with the first evidence of the Yellowstone mantle plume some 56 million years ago when it was offshore western North America and created the huge oceanic plateau called Siletzia. We will follow the hotspot track through time and space as well as explain how it may have caused such diverse and widespread volcanic and tectonic events that dominated the geology of the Northwest for the last 56 million years. The Yellowstone plume has left a linear…

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