- 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.
- A ridge of coral - A ridge of rocks, coral or sand at the water's edge - Area of shallow water - Coral bar - Gold-bearing vein - Great Barrier ... - Knot to be avoided by sailors
- 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.