The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.
Pigeon Hill was so named for the abundance of pigeons that roosted there, and fed on the spilled grain of the nearby flour mill. (Seattle Department of Engineering. SWSHS/Log House Museum FIC2006.0936)
During the Late Jurassic Epoch, Pangaea broke up into two supercontinents, Laurasia to the north, and Gondwana to the south.