SCIENCE|natural and applied sciences|earth sciences
- sceall Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Tonschiefer | Schiefer
- de
- shale
- en
- Sainmhíniú fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite Tagairt Wikipedia > Shale. http://en.wikipedia.org/wiki/Shale [20.1.2012]
- Nóta The process in the rock cycle which forms shale is compaction. The fine particles that compose shale can remain suspended in water long after the larger and denser particles of sand have deposited. Shales are typically deposited in very slow moving water and are often found in lakes and lagoonal deposits, in river deltas, on floodplains and offshore from beach sands. They can also be deposited on the continental shelf, in relatively deep, quiet water. This process could have taken millions of years to complete.