So. Many. ROCKS! 😮 The DNR's Hibbing Drill Core Library, one of the largest geologic research facilities in North America, allows geologists to access core samples for studying bedrock buried deep underground. 📢 Rockhounds and curious explorers: visit the new Core Shack inside the DNR theater at the Minnesota State Fair to explore the DNR's Hibbing Drill Core Library, and learn more about what lies beneath your feet! With boxes of bedrock core on display, come discover the unique geology of th