The Ledges. Unique ledges rising up to 60 feet on the banks of the Grand River appear for about a mile in Grand Ledge. This ancient sedimentary rock is the largest outcropping of rocks in Central Michigan, and the seventh largest in the state. Some 300 million years ago Grand Ledge was a salt water sea.
We hear quite a bit about calcium and iron, but magnesium is also a very important mineral in the body. Most commonly identified as an electrolyte and touted for its role in maintaining mineral balance, magnesium works hand-in-hand with calcium. Magnesium is also involved in over 300 essential metabolic functions making this mineral a key player in energy metabolism. Some of the most important are:
3- MAGNESIUM MAINTAINS NORMAL NERVE, BRAIN, & MUSCLE FUNCTION. While 60% of the Mg is in the bones, the rest is primarily in the cells where it functions to regulate the transmission of impulses between brain cells, & from nerves to muscles & organs. It also maintains normal muscle function & contractility.