IPA: /ʃeɪl/
KK: /ʃeɪl/
A type of rock that is made up of thin layers of clay and fine sediments, often found in the earth's crust.
The geologist studied the shale to understand the history of the area.
The word 'shale' originates from Old English 'scealu', meaning a shell or a thin plate. It refers to a type of sedimentary rock that often breaks into thin layers or plates, resembling the structure of a shell.
Think of 'shale' as a rock that breaks into 'thin plates' — just like a shell, which is also thin and layered.