Clacton-on-Sea, town (1991 pop. 39,618), Essex, E central England. It is a seaside resort situated on high cliffs. The Norman Church of St. John was restored there in 1865. Clacton-on-Sea is the area from which Clactonian tools, early flake instruments dating back to the early Interglacial stage, get their name.
"Clacton-on-Sea." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (September 23, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/clacton-sea
"Clacton-on-Sea." The Columbia Encyclopedia, 6th ed.. . Retrieved September 23, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/clacton-sea