Editing Oakley, California (section)

===Indigenous history===

Archeologists have found [[Prehistory|prehistoric]] sites in the Oakley area. One substantial shell mound was discovered early in the 20th century near what is now the eastern edge of town. The Northwest Information Center of the California Historical Resources Information System monitors the archeological investigations undertaken in Oakley. Around three dozen such projects have been completed in the past 25 years, yielding only four prehistoric sites in the city. However, the information center believes there is a high possibility that other prehistoric sites remain within the city. To enable further [[archaeological excavation]], the site referred to as Simon Mound was purchased by [[the Archaeological Conservancy]] after many of the ancient settlement places had already been destroyed by urban encroachment. Simone Mound has provided bones and fragments from burial sites starting around 1000 A.D. and is near a similar Conservancy preserve, the Hotchkiss Mound.<ref>{{Cite web|title=Conservancy's recent California acquisitions: Part 2: Simone Mound, in: The Archaeological|date=June 24, 2020 |url=https://www.archaeologicalconservancy.org/new-sites-west-part2//#|access-date=March 26, 2021}}</ref>

The first accounts of identifiable cultural community in the west delta are attributed to the [[Bay Miwok]]s, who occupied the region between 1100 and 1770 AD. The Bay [[Miwok people]], usually called the Julpunes or Pulpunes by European explorers, were organized into "[[tribelet]]s"—political units that included several fairly permanent villages and a set of seasonal campsites arrayed across a well-defined territory.