Beryllium Exploration Project

Erosional History
• During the 130,000 to 10,000 year period of
pronounced glaciations and inter-glacial flooding,
erosion of the Deep Creek granitic highlands,
west and adjacent to the paleo-shorelines,
provided detrital feed for the paleo-beaches of
Bonneville Lake basin. Granite grit, containing
magnetite and associated heavy minerals,
including rare earth-bearing minerals, became
feed for the beaches. This erosional debris was
distributed, worked and re-worked as the
shorelines advanced and receded.