CLIMATE VARIATIONS TENS OF MILLIONS OF YEARS AGO

CLIMATE VARIATIONS TENS OF MILLIONS OF YEARS AGO - Earth 2...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Earth 2 Thursday, February 25th, 1999 Announcements: Tests were returned and the second part of our textbook was picked up. Lecture notes: CLIMATE VARIATIONS TENS OF MILLIONS OF YEARS AGO Shows that the earth's climate was far from stable tens of millions of years ago Cold Climate Ice covered much of the earth at different points in time--21,000 years ago, 1/3 of the land was covered with ice. 280,000,000 years ago, almost the entire globe was covered with ice Grooves and striations show up, proving that ice is ripping up material in the environment Materials are picked up by ice and deposited where the ice melts (tills) Moraines are found, with unsorted materials and in various sizes Dropstones , which fall from the surface, disrupt sediments, and later have layers built upon them over time, are found near glaciers Antartica glaciated 28-35 million years ago, Greenland glaciated 3 million years ago The world was 3-5 degrees cooler than it is today Warm Climate Uniformitarianism --explains that the present is the key to the past. An
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '99
  • Eigenbrode

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern