Physical Volcanology of Large Lava Flows
Geological Field Trip--Eastern Isle Royale, Michigan
May 25-31 2013
Middle Proterozoic Continental Tholeiitic Flood Basalts 
of the 1.1 Ba Keweenaw Rift (Rodinia)

Trip Leaders: Bill Rose, Justin Olson

Geologic Features: 2013 Web Site Guide (draft)                                                                                            Hard copy format, 2013 field guide

Magma Oceans---Very large lava flows, (volumes > 1000 km3 and with millennia-long solidification times)

Tilted sequence of multiple mafic lavas ponded in the rift valley with many preserved solidification features

Wave-washed shoreline basalt exposures, 
Ophitic textural complexity, 
Variety of columnar jointing features, 
Mafic dolerites and pegmatites, segregation cylinders
Amygdaloidal zeolite facies minerals
spectacular landscapes