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Abrupt Events of the Past 70 Million Years - Evidence from Scientific Ocean Drilling
 
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The history of the Earth has been characterized by global change of a very gradual nature. However, the Earth's history has also included events of abrupt change. Often these changes coincide with catastrophic events (meteorite impact 65 million years ago). At other times, the global climate system gradually moves closer to a breaking point, at which time abrupt change occurs. Scientific ocean drilling has provided stunning examples of these abrupt events through its recovery of deep sea sediment cores.

This website has activities and resources, including a picture of a real ocean core showing abrupt changes, to help students analyze the evidence for abrupt changes in Earth's climate system using ocean cores. [Source: School of Rock] Grade level: 9-College.

LINK (http://www.joiscience.org/files/Joi%20Learning/schoolofrock/Library.html) >>
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