ESCI 1101 Lecture Notes - Lecture 9: James Ussher

• School: UMN
• Department: Earth Sciences
• Course: ESCI 1101
• Professor: Justin Ravenaugh

Document Summary

Never really talked about a "start", just continuing patterns. Earth was formed at 6pm on oct. 22, 4004bc. The two specific dates were actually the commencement dates/times that the colleges they worked at. Earth loses heat to universe over time, so you can track it back to when the planet was molten. Start of earth was when had solid surface. Need a long time for the vast biological diversity. Maybe something like a couple billion years (no exact number was proposed) Claimed that the evidence of earth"s formation is gone. "no vestige of a beginning, no prospect of an end" Determined his number through the amount of sediment and speed to build a delta.