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Contents contributed and discussions participated by harukas

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harukas

Relative and absolute ages in the histories of Earth and the Moon: The Geologic Time Sc... - 0 views

www.planetary.org/...gic-time-scale-earth-moon.html

relative absolute earth time scale

shared by harukas on 26 Jan 16 - No Cached
  • harukas on 26 Jan 16
     
    This website is about the differences between absolute ages and relative ages. Also, it shows the geologic time scales.
harukas

Palaeos Proterozoic: The Paleoproterozoic Era - 0 views

palaeos.com/...paleoproterozoic.html

Proterozoic

shared by harukas on 26 Jan 16 - No Cached
  • It was during the Paleoproterozoic that small islands of crust were first stitched together to form the stable nuclei of the continents we know today.
  • India has a similar history. Similarly, India appears to be an amalgamation of four cratons.
  • The formation of Baltica - the continent which was to become Europe -- is one of the best-known examples. Baltica formed in the Paleoproterozoic from the fusion of three cratons
  • ...1 more annotation...
  • For example, the core of South America formed around Amazonia in the Paleoproterozoic. The geologically stable core of South America is the Amazonian craton, roughly coterminous with northern and central Brazil and the inland areas of Venezuela, both Guyanas, and Suriname.
  • harukas on 26 Jan 16
     
    This website talks about the geography in the Paleoproterozoic era. There are many useful examples about the cratons or small islands connecting into a large continent. There are also explanations about the geochemistry during that time too. 
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