The Dolomite and Aragonite Problem: A Summary

By Damien Knight

A work in progress

The dolomite problem is a problem in how the formation of massive dolomite beds occurred. Dolomite is CaMg [CO3] 2 that differs from limestone in that magnesium substitutes for half the calcium. The problem is dolomite only forms in lagoons or extreme environments in smaller quantities today, the formation of dolomite beds is a mystery. It is hypothesized that these dolomites resulted from extra-terrestrial planting.

The aragonite problem is that aragonite is its more soluble than calcite. It would make sense that aragonite which is formed biologically in seashells not be formed at all. According to the one article I found the aragonite forms in magnesium rich seas. As magnesium increases the amount of calcite decreases until all that is formed is the more soluble aragonite.


Sources

 

Helmholtz Centre for Ocean Research Kiel (GEOMAR). (2012, June 7). How does dolomite form?. ScienceDaily. Retrieved November 17, 2017 from www.sciencedaily.com/releases/2012/06/120607105815.htm

The Dolomite Problem. (n.d.) Retrieved November 17, 2017, from http://www.eu-geology.com/?page_id=107

Chandler, D. L. (2015, March 02). Mystery solved: Why seashells’ mineral forms differently in seawater. Retrieved November 19, 2017, from http://news.mit.edu/2015/why-seashell-mineral-forms-differently-in-seawater-0302

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2 comments on “The Dolomite and Aragonite Problem: A Summary

  1. This is quite interesting. I enjoy learning about different minerals and their compounds.

    Like

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