The National Park Service says archeologists discovered another ancient Native American site in the Channel Islands off Southern California.

The service said Tuesday that stone tools representative of early North American Paleoindians were discovered during rehabilitation of a 19th century ranch house on Santa Rosa Island in Channel Islands National Park.

The objects were found under the historic Main Ranch House when it was lifted to build a new foundation.

"Made from local island chert and used for hunting and fishing, they are signatures of a sophisticated technology of early tool making on the Channel Islands," the NPS said in a news release.

University of Oregon archeologist Jon Erlandson says the barbed points and crescents are believed to be at least 10,000 years old. Santa Rosa is also site of the discovery of Arlington Man, human remains that have been dated to some 13,000 years ago. Erlandson says the northern Channel Islands have more than 100 sites over 7,500 years old.

The NPS says the Main Ranch House operated as a sheep and cattle ranch for more than 150 years and was built sometime after 1869. Take a look: