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Historical Geology Web Research Discussion

Research one of the followingquestions on the Internet. Research sources of information on the Web caninclude, but not limited to, books, articles, videos, and handouts.

1. What are the mineralogical and stability differences between thecarbonate minerals calcite and aragonite?

2. How have organic reefs differed over time in terms of dominantorganisms which make up their framework structures? Be sure to give a fewexamples.

3. How is the inorganic precipitation of calcium phosphateinhibited in most marine waters?

4. Some evaporite units are more than 2 km thick. How can suchenormous amounts of evaporative minerals accumulate? Note that evaporating theentire Mediterranean Sea right now will produce only 60 m of salt deposits.Research and describe one possible depositional model.

*Need a 1/2-1 page* 

*choose any of the four topics above; whichever is easiest*

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