Show Summary Details

Page of

PRINTED FROM OXFORD REFERENCE (www.oxfordreference.com). (c) Copyright Oxford University Press, 2013. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use (for details see Privacy Policy and Legal Notice).

date: 22 January 2020

Snowball Earth 

Source:
A Dictionary of Geography
Author(s):

Susan Mayhew

This theory posits that, several times in Earth’s history, oceans froze, ice sheets covered the tropics, and global temperatures plummeted to −50°C, so that the entire Earth may have actually frozen over, resembling a ‘snowball’, and potentially causing some of the most severe crises in the history of life on the planet. Such episodes may have been triggered by a reduction in greenhouse gases in the atmosphere, principally CO... ...

Access to the complete content on Oxford Reference requires a subscription or purchase. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can''t find the answer there, please contact us.