weathering - exploreiowageology.org€¦ · weathering-resistant fe and al oxides. 0 02 g 02...
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Web adventure: Frost at work
Frost shattered
rocks
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gypsum
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pyroxene hematite quartz
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dissolution
calcite bicarbonate
Strat and Sed, Ch. 1 23
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• Orthoclase (K) feldspar • Plagioclase (Na) feldspar
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Mafic minerals Felsic mineralsolivine
Ca plagioclasepyroxene
Ca-Na plagioclaseamphibole Na-Ca plagioclase
Na plagioclasebiotite
orthoclase, muscovite, quartzincr
easi
ng st
abili
ty
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