Why did the Greeks First Settle in the Region of Magnesia?

An open question to our readers?

Why did the ancient inhabitants of the region known today as Greece, which became the founding culture of Western civilization, begin around Magnesia? Did the Greeks have knowledge of the regional high magnesium limestone that could be dissolved with heat into the baths or even a concentrated viscous brine (a derivative of salt mining for which Greece was famous) for the skin, directly or through natural spring, or man-made limestone baths? Did that knowledge allow for zero magnesium deficiency, contrary to our 95% deficient Western culture of today, and therefore allow for the stronger bones, tissues, nerves and brains of our ancestors?. Can we truly find full health if this valuable wisdom of the past is not recovered and brought into a modern light and application?