(n.) A rock made of sand more or less firmly united. Common or siliceous sandstone consists mainly of quartz sand.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). sandstone. Retrieved September 21, 2026, from http://smartdefine.org/sandstone/definitions/2057793 |
| Chicago | Webster's. 2011. "sandstone" http://smartdefine.org/sandstone/definitions/2057793 (accessed September 21, 2026). |
| Harvard | Webster's 2011, sandstone, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/sandstone/definitions/2057793>. |
| MLA | Webster's. "sandstone" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/sandstone/definitions/2057793> |