FORMATION OF THE GREAT LAKES, PAGE 3

10/12/2022

Before discussing these Crater Impact Lakes, one must look at photographs taken through space-oriented telescopes. This solar system is awash with all kinds of mobile debris that range from specks to mountain-range-size asteroids. Some are elemental and others can be mineral compounds that have an unknown history. Add to this, a collection of comets which are composed of ices that can be frozen water or another form of a chilled liquid or gas. They may or may not sheath a solid rock within. Other comets may be a homogeneous blob of frozen ammonia or another concoction of exotic gases that solidified into a rock-hard sphere that is traveling at hypersonic velocities in the vacuum of space. Occasionally at night, “shooting stars,” or high-speed rocks that burn up when hitting our atmosphere can be visible. The evidence is everywhere that the giant emptiness that surrounds objects in space harbors a nearly infinite fleet of solid objects that scoot around in countless trajectories. Throwing in a 13.787-billion-year-old clock, it becomes quite apparent that, over time, collisions can and do occur. Our own moon, as viewed with a small telescope, can reveal some of the larger craters that number 9,137 as listed by the International Astronomical Union, including the 1,600 mile in diameter South Pole Aitken (SPA) crater. The largest known impact crater on earth is the Vredefort Impact Structure in South Africa with a 190-mile diameter and an approximate age of over 2 billion years old. It was created by a meteorite that was estimated to be 10-15 kilometers in diameter. The earth has around 17 collisions per day that impact earth and create small craters on the terrestrial portions of the globe. Those, that land in water, speed down to the Ocean’s floor and are rarely discovered. The very large impacts show up indirectly in geological  investigations as scientists probe the depths looking for oil and other profitable resources on our planet. Only then are they recorded. 

Craters of Earth’s moon
Vredefort crater. Largest confirmed impact structure to date. Located in South Africa. It is nearly 190 miles in diameter


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