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Acorns in San Diego History

Hunter-gatherer activities at Pio Pico

They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. There were enough oaks at the Pio Pico site to support at most 33 villages. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”
They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. There were enough oaks at the Pio Pico site to support at most 33 villages. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”

During a survey of 94 acres on Rancho Jamul, on March 9,1982, Susan Melinda Hector discovered a site where Late Prehistoric “hunter-gatherers” lived. Along with several assistants, Hector excavated the site in 1982 and 1983 and wrote the findings in her doctoral dissertation.

Arrowheads found in Rancho Jamul. Excavation — with all soils passed through a one-inch mesh screen — also produced 142 flaked stone tools.

Hector renamed site SDi-9476 as “Pio Pico,” because it’s directly across Otay Lakes Road from the campground by the same name. The site is 16,000 square meters and lies on an alluvial terrace above Dulzura Creek, east of the confluence with Jamul Creek. The two creeks empty into Lower Otay Reservoir two miles west of the site. The rugged topography — Jamul mountains to the west, San Ysidro mountains to the south — includes abundant natural springs and “seeps.”

Based on its types of pottery and radio carbon testing. Hector classified the site as Late Prehistoric. Charcoal samples dated 330 B.P. (Before Present) and 250 B.P. indicate a phase of prehistory that began around 1000 A.D. and remained intact until the Spanish entered the area.

Like the previous cultures in San Diego, the Late Prehistoric people in Southern San Diego belonged to a Yuman linguistic group that came from the Colorado Desert. They were “collectors” and used a single village as a base camp throughout the year.

Hector and her assistants analyzed tools, bones, flakes of stone, and other indicators of activity in the area. She determined that the site was “homogeneous,” meaning that each family conducted all required activities.

The main meat source was jackrabbit, cottontail, and small rodents, plus the occasional mule deer, duck, valley quail, and small quantities of shellfish. These latter were mussels brought hack from foraging missions to the ocean (fishbones of sharks and rays also show evidence of these trips). The mussels were poisonous in summer and fall. But in winter and spring — times of food scarcity — they provided a valuable supplement.

The people also roasted grasshoppers, yuccas, and ate abalone (using the shells for ceremonies). But their number-one food source was the acorn, shaken from the branches of Coast Live Oak trees. They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. Hector estimates that there were enough oaks at the Pio Pico site to support at most 33 villages — and a minimum of 3. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”

The excavation produced many shards of pottery. This was “Tizon Brownware,” a brown, smooth, unpolished pottery made from granitic clays and native to the region. Pottery first came to the San Diego area between 1300 A.D. and 1000 A.D.

Excavation — with all soils passed through a one-inch mesh screen — also produced 142 flaked stone tools, suggesting that a great amount of tool-production took place at Pio Pico.

In conclusion, Hector says, “the site was occupied immediately prior to Spanish entry into the area.” The site enjoyed “perennially watered valleys” and, because it permitted large communities to “develop and thrive,” Hector regards it as the hunter-gatherer’s “ultimate adaptation to the region.”

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They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. There were enough oaks at the Pio Pico site to support at most 33 villages. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”
They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. There were enough oaks at the Pio Pico site to support at most 33 villages. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”

During a survey of 94 acres on Rancho Jamul, on March 9,1982, Susan Melinda Hector discovered a site where Late Prehistoric “hunter-gatherers” lived. Along with several assistants, Hector excavated the site in 1982 and 1983 and wrote the findings in her doctoral dissertation.

Arrowheads found in Rancho Jamul. Excavation — with all soils passed through a one-inch mesh screen — also produced 142 flaked stone tools.

Hector renamed site SDi-9476 as “Pio Pico,” because it’s directly across Otay Lakes Road from the campground by the same name. The site is 16,000 square meters and lies on an alluvial terrace above Dulzura Creek, east of the confluence with Jamul Creek. The two creeks empty into Lower Otay Reservoir two miles west of the site. The rugged topography — Jamul mountains to the west, San Ysidro mountains to the south — includes abundant natural springs and “seeps.”

Based on its types of pottery and radio carbon testing. Hector classified the site as Late Prehistoric. Charcoal samples dated 330 B.P. (Before Present) and 250 B.P. indicate a phase of prehistory that began around 1000 A.D. and remained intact until the Spanish entered the area.

Like the previous cultures in San Diego, the Late Prehistoric people in Southern San Diego belonged to a Yuman linguistic group that came from the Colorado Desert. They were “collectors” and used a single village as a base camp throughout the year.

Hector and her assistants analyzed tools, bones, flakes of stone, and other indicators of activity in the area. She determined that the site was “homogeneous,” meaning that each family conducted all required activities.

The main meat source was jackrabbit, cottontail, and small rodents, plus the occasional mule deer, duck, valley quail, and small quantities of shellfish. These latter were mussels brought hack from foraging missions to the ocean (fishbones of sharks and rays also show evidence of these trips). The mussels were poisonous in summer and fall. But in winter and spring — times of food scarcity — they provided a valuable supplement.

The people also roasted grasshoppers, yuccas, and ate abalone (using the shells for ceremonies). But their number-one food source was the acorn, shaken from the branches of Coast Live Oak trees. They poured hot water through baskets of acorns to leach out the bitter-tasting tannin. Hector estimates that there were enough oaks at the Pio Pico site to support at most 33 villages — and a minimum of 3. “The nutrients in the acorns, combined with other foods, provided a complete diet for an individual.”

The excavation produced many shards of pottery. This was “Tizon Brownware,” a brown, smooth, unpolished pottery made from granitic clays and native to the region. Pottery first came to the San Diego area between 1300 A.D. and 1000 A.D.

Excavation — with all soils passed through a one-inch mesh screen — also produced 142 flaked stone tools, suggesting that a great amount of tool-production took place at Pio Pico.

In conclusion, Hector says, “the site was occupied immediately prior to Spanish entry into the area.” The site enjoyed “perennially watered valleys” and, because it permitted large communities to “develop and thrive,” Hector regards it as the hunter-gatherer’s “ultimate adaptation to the region.”

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4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs
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