Open Access Geology Textbook Online
For the lay rock and mineral collector, there is
a rather nice open access geology textbook. It
is "Earth's Dynamic Systems Web Edition 1.0" T
http://www.earthds.info/
http://www.earthds.info/TOC.html
http://www.earthds.info/Preface.html
Eric H Christiansen and W. Kenneth Hamblin
obviously put a lot of time and effort into it and
is a good introductory text for the interested
layperson.
Best wishes,
Paul H.
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