To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Today, glaciers are found at high latitudes, closer to the pole, or at high altitudes, typically about 4,000 meters above sea level. However, the rock record tells us that during the past two billion years, Earth has experienced several episodes in which the distribution of ice across the globe was distinctly different than the modern arrangement. Earth has experienced about eight major glacial periods throughout its history, including the current stage (Figure 8.1).