Image credit: James St. John
CaCO3
fossiliferous limestone coquina oolite travertine
limestone breccia micrite chalk
(Ca,Mg)(CO3)2 dolostone
Fe2O3 ironstone
conglomerate breccia sandstone shale
Flickr Image gallery, James St. John: dolostone
Mindat.org image gallery: dolostone
Google images: dolostone
Mindat.org: About dolostone
Kentucky Geological Survey: dolostone