SCIENCE|natural and applied sciences|earth sciences|geology
- sceall Tagairt Ionstraim Aontachais 1979, Iar VII, IO L 291/79, lch. 147 (27.15)
- ga
- shale
- en
- Sainmhíniú fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2Si2O5(OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. Tagairt "Wikipedia > 'Shale' (20.2.2024)"
- Nóta It is characterized by thin laminae breaking with an irregular curving fracture, often splintery and usually parallel to the often-indistinguishable bedding plane. This property is called fissility. Shale is the most common sedimentary rock. The process in the rock cycle which forms shale is compaction.