- Citrus fruit has tone of sedimentary rock - Green rock found in caves - Hard sedimentary rock - Sedimentary rock - See Milton mix calcium carbonate - Type of cave with formations - Whitish-coloured rock
- Limestone formation - Sedimentary rock - A variety of limestone, consisting of small round grains,
resembling the roe of a fish. It sometimes constitutes extensive beds,
as in the European Jurassic. See the Chart of Geology.
- A form of sedimentary rock - Sedimentary rock - Soft rock - A rock made of sand more or less firmly united. Common
or siliceous sandstone consists mainly of quartz sand.
- A Hard Building Stone - extremely hard rock - Igneous rock - Igneous rock derails train, e.g. - Quartz rock - Type of rock - A crystalline, granular rock, consisting of quartz,
feldspar, and mica, and usually of a whitish, grayish, or flesh-red
color. It differs from gneiss in not having the mica in planes, and
therefore in being destitute of a schistose structure.