Shale is a city located in Albania.
The provided source material does not contain specific geographical details or historical information regarding this location, as it focuses on the geological definition of shale. In a geological context, shale is a fine-grained, clastic sedimentary rock formed from mud composed of clay minerals and tiny fragments of other minerals such as quartz and calcite.
A defining characteristic of shale is its fissility, which is the tendency of the rock to split into thin layers less than one centimeter in thickness. It is identified as the most common type of sedimentary rock.