It takes but one generation to create an entirely new Creole. Sometimes they are created out of several closely related languages. Sometimes they occur when the constituent languages are very distant (Hawaii has such a Creole made up of Portuguese elements, English elements, Japanese elements, Tagalog elements, several different Chinese elements, and Polynesian elements.
Creoles differ substantially from pidjin ~
Yes, Pidgin Delaware came into being probably pretty quickly in the early 1600s.
But I still don’t see how that explains Algonquian—where you have languages as different as Lenape and Blackfoot descended via regular rules of historical phonology from a common ancestor.