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Unformatted text preview: Chapter 20: The Holocene: Also known as “The interval”, is the Neogene epoch that extends to the present from the most recent retreat of continental glaciers in the Northern Hemisphere, about 11,600 years ago. It stands out as a unique geologic interval, both because of its brevity and because human’s have altered it by hunting, cutting trees and planting crops, and building towns and cities, burning fossil fuels, and creating vast networks of com munication and transportation. Holocene sediments and fossils are fully within the range of radiocarbon dating, so they can be dated with great precision. Also use fossil records of species to characterize habitats. Holocene shows how the Earth system has approached its present state. The Retreat of Glaciers: Temperature of the Rocky mountain region began to rise and this was proven by the insect species that have survived. The melt waters have flown to the sea which has begun to rise as well. Moraines reveal that the retreat of the glaciers was slow at first but accelerated afterwards. The remnants that created depressions are called prairie potholes Tundra, that bordered the continental glaciers, shifted northward with them as they retreated. FartherTundra, that bordered the continental glaciers, shifted northward with them as they retreated....
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This note was uploaded on 12/05/2011 for the course BIO 211 taught by Professor Jessica during the Spring '11 term at University of Toronto.
- Spring '11