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<p>the formation of distinctive minerals from the silica and clay present in the original limestone.</p>

<p><big>Classification</big></p>
<p>Two major classification schemes, the Folk and Dunham, are used for identifying the types of <a href="page.php?w=carbonate_rocks">carbonate rocks</a> collectively known as limestone.</p>

<p><big>Folk classification</big></p>
<p><a href="page.php?w=Robert_L._Folk">Robert L. Folk</a> developed a classification system that places primary emphasis on the detailed composition of grains and interstitial material in <a href="page.php?w=carbonate_rocks">carbonate rocks</a>.</p><p>
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