Geologic Timeline Individual Reflection

Geologic Timeline Individual Reflection

While working on the timeline, I learned about many events in Earths history. Some of the biggest events were the first living organisms as microscopic bacteria in the precambrian era, Earths largest extinction in the end of the permian period, and the birth of the dinosaurs in the Triassic period. The scale of earths history really surprised me because when we were working on the timeline about 90% of the timeline was the whole Precambrian era. When we were labeling the other periods and era I realized that even though those eras themselves were very long their size didn't even compare to the size of the Precambrian era. When I learned about the events in earths history it is really hard to believe how much this planet has gone through and how well it has survived. Earth has gone through a lot of mass extinctions and change in dominant mammals that have just went extinct. A question that I have is how did scientists gather all this specific information because it was so long ago, but it is amazing that they did. 

 

http://news.wisc.edu/oldest-bit-of-crust-firms-up-idea-of-a-cool-early-earth/