About 13,000 years ago the melting glaciers that covered Minnesota and Canada created a vast lake, bigger than all the Great ...

Explore the historic Maryland landmarks that shaped America's history; the rich heritage and significant contributions of ...

Pollucite, Lily Pad Lake, Manitoba. Deposits and Occurrences The Tanco pegmatite at Bernic Lake contains two thirds of the world’s known reserves of cesium. Cesium is mined as pollucite ore in a ...