BIO 1130 Study Guide - Quiz Guide: Late Heavy Bombardment, Geologic Time Scale, Cambrian Explosion

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

System of chronological measurement that relates stratigraphy (branch of geology dealing with rock layering) to time. Used to describe the timing and relationships between events that have occurred throughout the. Divided into eras, which are further divided into periods. A subdivision of geological time enabling cross-referencing of rocks and geological events from place to place. First geologic eon of the earth and is before the archean. Began with the formation of earth 4. 6 billion years ago and ended 4 billion years ago. Formation of earth and solar system, but no life forms yet. This eon occurred approximately 3. 8 2. 5 billion years ago. Archea: one of two domains of prokaryotes; archeans have some unique molecular and biochemical traits, but they also share some traits with bacteria and other traits with eukarya. At this eo(cid:374), the earth"s heat flo(cid:449) (cid:449)as (cid:374)earl(cid:455) thri(cid:272)e (cid:449)hat it is toda(cid:455) Fossils existed during this eon, as well as eubacteria (domain bacteria)