DANCEST 805 Lecture 45:
Document Summary
An epoch is a period of time, like eras but, it is longer than eras and can cover more than one lifetime: what is holocene, by definition it started -11700 years ago, after the ice age; There are 3 proposals of when the anthropocene actually started: the columbian exchange of the old world-new world (colonization of the americas); Industrial revolution from 1784 (creation of the steam engine), use of carbon emitting"s + imperialism, large scale agriculture: great acceleration from 1950s, 1. emergence of techno fuels, 2. All this led to changes in the earth"s systems: Increase in concentrations of greenhouse gases (co2 30%, ch4 more than 100%): anthropocene sedimentary fluxes have been intensified, including enhance erosion caused by deforestation and road construction, widespread sediment retention behind dams has amplified delta subsidence; It is the human influence in the earth and its effects that marked the beginning f the.
