A fine-grained sedimentary rock
Derived from the English word for the sedimentary rock that easily splits into thin layers. It is a modern nature-inspired choice that fits the trend of using geological and mineral names.
Less common today
Shale isn't in the latest US Top 1000. It last peaked at #6,708 in 1999.
US births per 5-year period, 1990–present (SSA data).
