{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

g20 - Ice Ages Pleistocene 3 M.y Permian 250-220 M.y...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Ice Ages Pleistocene 3 M.y. Permian 250-220 M.y. Ordovician 450 M.y. Precambrian 900-650 M.y. (Snowball Earth) 2300 M.y .
Image of page 1

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

View Full Document Right Arrow Icon
Time (1000 Years) North America Alps Northern Europe Poland-Russia 0-18 Interglacial 18-67 Wisconsin Wurm Vistula Varsovian 67-128 Sangamon Uznach Eem Masovian 128-180 Illinoisan Riss Warthe/Saale Cracovian 180-230 Yarmouth Hoetting Holstein Sandomirian 230-300 Kansan Mindel Elster Jaroslavian 300-330 Aftonian Cromer Likhvin 330-470 "Nebraskan " Gunz Menapian 470-540 Waalian 540-550 Donau II Weybourne 550-585 Tiglian 585-600 Donau I 600-2000 About 20 Glacial Advances 2000 (2 M.Y.) Beginning of Pleistocene 4000 (4 M.Y.) Dwarf forests still in Antarctica 15 M.Y. First Glaciation in Antarctica
Image of page 2
The Last 800,000 years
Image of page 3

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

View Full Document Right Arrow Icon
Beginning of the Ice Ages
Image of page 4
Milankovich Cycles Cool Summers More Important Than Cold Winters Tilt of Axis Shape of Orbit Precession Can’t be the whole story-have operated throughout earth history
Image of page 5

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

View Full Document Right Arrow Icon
Axis Tilt Small Axis Tilt: Mild winters but cool summers. Favors Ice Age Large Axis Tilt: Cold winters but hot summers. Favors Interglacial
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ 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