Discoverer of carbon dating
What happens next is like something out of a Dooms-Day sci-fi movie: The exploding comet creates a giant white-hot tornado and sets forests ablaze killing off just about everything and everybody in North America.The remaining vegetation would have been charred, forcing starvation upon surviving mega fauna. This comet melted a good portion the Laurentide Ice Sheet and the resultant flood waters changed the Atlantic currents.Who wouldn't have picked up such interesting and shiny stones in a world where shiny objects were rare?(And how could you resist a face looking up at you through the sparkling water?This cheeky little toddler is even cuter in real life.The head is red and yellow carnelian agate w sparkling clear crystal eyes. This pre-Columbian artifact was probably a child's toy or mother's keepsake; 2 parts.
Northern Illinois has an unusual climate history due to its latitude and geology.Although the glaciers had retreated, the climate was still quite cold.About 16,000 years ago, the spruce forest became denser, and closed forest developed.During this time birch (Betula) and alder (Alnus) were also important components of the vegetation.[At that time, the summers here were one month shorter than today and rivers had dropped to their near present levels.By the end of this Mini-Ice Age 11,700 years ago, the climate warmed. After the floods, gravity continued its work on the riverstones, again using water as a tool, albeit in less dramatic fashion: Since glaciers follow the course of rivers, the exposed rocks were washed down and further polished by flowing water.