Noun
English Wikipedia has an article on:dolostoneWikipedia
dolostone (plural dolostones)
(geology) A sedimentary carbonate rock that contains a high percentage of the mineral dolomite.
Synonym: dolomite rock
As the bedrock (like limestone or dolostone ) continues to break down, its cracks tend to get bigger. Source: Internet
Green coloration is often due to serpentine resulting from originally high magnesium limestone or dolostone with silica impurities. Source: Internet