Variations of tree ring widths ? climate variations

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Variations of tree ring widths ? climate
variations
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Coral cores? surface salinity records of last
100 years
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Vostok a station on Antarctica Analysis of
ice and gas bubbles trapped in ice yields past
climate history of last 460,000 years
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Geomorphologic records of past climate
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V-shaped Valley
U-shaped Valley
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Cores of Ocean Sediments
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The Burgess Shale is an exceptional Middle
Cambrian age (about 540 million years ago) fossil
locality located in Yoho National Park in the
Rocky Mountains, near Field, British Columbia,
Canada. The locality is special because of the
soft-bodied preservation of a wide diversity of
fossil invertebrate animals. The locality has
been intensely studied since its discovery in
1909 by Charles Walcott, and has been declared a
World Heritage Site. A popular introduction to
the Burgess Shale can be found in Steven J.
Gould's book, "Wonderful Life".
Ottoia a carnivorous worm
Trilobite
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Banded Iron Formation Clues to ancient
atmospheric composition

• Banded Iron formations occur in Proterozoic
  rocks, ranging in age from 1.8 to 2.5 billion
  years old.
• They are composed of alternating layers of
  iron-rich material (commonly magnetite) and
  silica (chert).
• Each layer is relatively thin, varying in
  thickness from a millimeter or so up to several
  centimeters.