Type:

Other

Description:

This slide show presents images which show the paleogeography of the southwestern United States from 1.8 billion years ago to 10 million years ago. The slide show was originally presented at the annual meeting of the Geological Society of America in 1997. Beginning in the Precambrian, it traces the paleogeographic evolution of the region through the Tertiary. Emphasis is on the Mesozoic where two or more images of each period are shown. Two different interpretations are presented for some of the periods. One shows a tectonic interpretation in which most elements of the western U.S. were derived from North America; the second shows a tectonic interpretation in which some elements originated far from North America (exotic elements). A written narrative is also provided.

Subjects:

  • Science > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10

Keywords:

Space Science,Undergraduate (Lower Division),Astronomy,History of science,NSDL,Chemistry,Geology,Science,Middle School,Graduate/Professional,NSDL_SetSpec_dlese.org,Higher Education,High School,Space sciences,Physical sciences,History/Policy/Law,Geologic time,Physics,Geoscience,oai:nsdl.org:2200/20061003232311670T,Earth science

Language:

English

Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial Share Alike

Collections:

None
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