BIOB51H3 Lecture Notes - Lecture 4: Shark Tooth, Radioactive Decay, Radiometric Dating
Document Summary
Paleontology & the history of life-chapter 3 (lecture notes) Darwin and other scientists have recognized the importance of the galapagos. Shark teeth can be found in limestone outcrops in central kansas. One of the most important aspects of darwin"s theory was that it was: based upon speculative ideas, based upon dna analysis, testable, formulated over more than 20 years. According to darwin if gradual erosion then: the weald (rolling hills and valleys in england) is 300 million years old, the earth is billions of years old. Physicist lord kevin argued that earth was younger than darwin assumed. Proposed earth was no more than 20 million years old: used the rate of heat loss (heated rock the steadily cools) Calculations later proved to be false: earth is not static, tectonic plates, magma moves up and down, keeps upper layer warmer than predicted (if it was a solid sphere)
