Materials
Materials
Minnesota is home to several clay and mineral resources spanning a period of 3.5 billion years. We collect materials from many parts of the state in an attempt to showcase the region’s diverse geologic history.
From the remnants of ancient lava flows to more recent glacial lakes, each resource functions as an important marker of the unique environmental changes that have shaped the region.
Late Cretaceous Ball Clay / Shale
Minnesota River Valley |
Primary Kaolin
Central Minnesota |
Early Cretaceous Ball Clay / Shale
Minnesota River Valley |
Mottled Cretaceous Clay
Minnesota River Valley |
Glacial Red Clay
Lake Superior Region |
Ball Clay Screenings
Minnesota River Valley |
Iron Concretion
Minnesota River Valley |
Basalt
Lake Superior |
Rhyolite
Lake Superior |
Red Granite
Central Minnesota |
Arkose Sandstone
Lake Superior Region |
Fossil-Rich Dolomite
Twin Cities |