FAH215H1 Lecture Notes - Lecture 4: Late Glacial, Geochronology, Louis Pasteur
Document Summary
Lecture 4 thursday january 25 the environmental prequel: from our earliest ancestors to the late glacial. Part 1 geochronology and our early ancestors. Supereons: a time period encompassing more than one eon, principally used to characterize the. Eon: an indefinite and very long period of time, often a period exaggerated for humorous or rhetorical effect. ie phanerozoic (eon): beginnings of advanced organisms. Epochs: a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series in chronostratigraphy. Ages: a division of time that is a subdivision of an epoch, corresponding to a stage in chronostratigraphy. Periods: a geologic period is one of several subdivisions of geologic time enabling cross-referencing of rocks and geologic events from place to place. From the formation of our planet to the first hard-bodies organisms. Accounts for ~90% of earths geological history. Made of the following three eons: hadean, archean, proterozoic.
