Tar-pit volunteers get their hands dirty — and like it
Sorting the largest collection of Ice Age fossils found anywhere on Earth is a mammoth undertaking. So the small staff overseeing the La Brea Tar Pits in Los Angeles relies on an army of volunteers to patiently clean the countless fossils and prepare them for study.
Los Angeles Times
Every Thursday morning, Judith Sydner-Gordon puts on the same simple uniform: khaki cargo pants and an electric-orange T-shirt with a saber-toothed cat emblazoned across the front. Recently, she added an accessory, a miniature canine skull that dangles from a silver chain around her neck.
“Wolfie,” she calls him, after the dire wolf specimen she worked on last year.
Sydner-Gordon, a retired elementary-school teacher, has spent five years picking through the remains of animals that died during the last Ice Age. She’s one of about 35 volunteers who dedicate one day a week to the largest urban excavation project in the world: the bony quarry of the La Brea Tar Pits.
On this empty weekday morning, the cries of a school tour float across La Brea’s immaculately manicured grounds. A few runners stop to stretch under the shade of leafy jacarandas while traffic roars down Wilshire, hurtling past eons of history.
Sydner-Gordon perches on an army-green cushion inside a big wooden crate. Its walls enclose a small mountain of solid rock — a fossil-ridden hunk hewn from the ground to make room for the parking garage at the nearby Los Angeles County Museum of Art. She leans close to the tacky asphalt, expertly wielding a dental pick to disentangle a dainty bird bone from a frozen jumble of femurs, vertebrae and scapulas.
“We are the first humans to see this stuff after all these thousands of years,” she says.
Volunteers like Sydner-Gordon are an invaluable asset to the small staff operating out of the Page Museum, which houses and displays La Brea’s treasures. With their donated labor, the team has chiseled and scratched through nearly 6 feet of rock that once towered above the pitted surface of Box 14, where Sydner-Gordon now works.
Reaching down to touch the stone, she says, “To have this here — literally, at your fingertips — is just amazing.”
Central Los Angeles may seem an odd location for the largest collection of Ice Age fossils found anywhere on Earth. But the bitumen that ensnared hapless creatures and preserved their bones originated in a familiar place: the oil fields that lie beneath much of Southern California and fueled its early economic growth.
For tens of thousands of years, tar has percolated up to the surface from deep underground, pooling in ponds of lethal sludge. Giant ground sloths, American camels, wily coyotes — none escaped its grasp. Even mice, lizards and bees fell prey to the ooze, along with the leaves and branches of a lost landscape.
“It’s a library of the Ice Age,” says Luis Chiappe, vice president of research and collections at the Los Angeles County Natural History Museum, which oversees the Page Museum. The tar pits contain the evidence scientists need to reconstruct a vivid picture of a vanished ecosystem, and to understand how it responded to the climate changes of the last glacial period.
The first fossil (a gargantuan canine from a saber-toothed cat) was identified in 1875, and excavations began in earnest in 1913. After 100 years of digging, scientists’ understanding and the museum’s collection continue to grow.
At the moment, the volunteers are working through 23 new fossil deposits unearthed during the project, each now housed in its own crate. Guided by trained paleontologists, they plan to go through every one, in addition to the vat of Pit 91, an active seep where scientists have worked on and off since 1969 (but only in summer, when the tar flows).
So far, they’ve extracted almost 4 million fossils — from 10-foot mammoth tusks to iridescent beetle wings. They have hardly scratched the surface.
“You can’t think in terms of finishing,” says Shelley Cox, who coordinates the ranks of volunteers. “It’s about progress.”
Cox started as a volunteer nearly 40 years ago, before the Page Museum existed. She thrived despite being “unmathematical,” she says.
Over her career, Cox has shepherded more than 4,000 volunteers through the tar pits. She has seen all kinds come and go, including a 16-year-old boy who went on to become a paleontologist and a 92-year-old butcher who recently called it quits. Both worked at the tar pits for over 30 years.
With about 40 applications each year, she gets to be choosy. Only 25 percent make the cut, although she tries to accommodate as many students during the summer as she can.
Cox knows what traits make a good fit: patience, willingness to learn and, most important, respect for the fossils.
“If a fossil was in the ground for 35,000 years, we don’t have to do anything today,” she says
Dedication is expected from La Brea’s volunteers, who make a minimum 12-month commitment when they enlist. But in return, the staff grants volunteers almost complete control over their projects.
Cox always double-checks their work. Surveying the efforts of another volunteer, she ticks off what she finds: “dermal scute of a lizard, a cute little snake vertebra, juniper seed pod.” She sends one chunk flying to the edge of the microscope’s stage: “That one is just a dirt clod.”
During working hours, the lab echoes with friendly chatter, a sign of the camaraderie that binds this diverse bunch. The Thursday crew includes a retired buyer who worked in aerospace, a middle-aged actress and an anthropology student home from New York University for the summer.
Then there is Dixie Swift, 79, who used to run a cultural center in Long Beach and has been a volunteer for four years. She simply loves the beauty of bones. (She even has a pelican skeleton suspended above her dinner table.)
“I tell everybody this is my free master’s class,” Swift says. “At my age, I’m not interested in going to the extent of being a scientist, but I’m always learning. It gives me food for thought.”
Like the other volunteers, she says she feels privileged to participate in a project that began over a century ago right in her own backyard.
“I knew about this place; I had come and visited,” Swift says. “But I think it gets lost that this is an active research center.”