Along with the hearthstones, animal bones, and remains of plants likely used for food, medicine, and fuel discovered during the excavations, the materials may shed light on the lives of indigenous people who camped along the Delaware River as early as 4000 years back.
Some of the objects will be donated to and displayed by the Camden County Historical Society museum in Camden.
“It is mind-blowing,” executive director Jack O’Byrne said. “We have not gotten into the archaeology business before. It is our intention to look for grants or partner with a university.”
But while artifacts “are really cool,” the diggers discovered more than just artifacts, said Ilene Grossman-Bailey, senior archaeologist on the project.
“The intact remains of Native American activity on the site can help us understand what people were actually doing when they were there,” she said.
Grossman-Bailey works for RGA Inc. of Cranbury, Middlesex County, the firm hired by Camden County and Holtec International to conduct the 2 excavations in 2015 and 2016.
The state required archaeological studies because the construction of the Holtec International campus at the former New-York Shipbuilding Co. site impacted wetlands.
After studying vintage maps as well as the results of test borings to determine the most likely locations of ground undisturbed by industrial or other activity, a team of archaeologist worked for months with hand tools to locate, document, and collect artifacts, which they transported back to RGA.
Grossman-Bailey said about a half-acre of vacant land north of Morgan Boulevard and east of Broadway most recently occupied by row houses was excavated to a depth of 1 to 2 feet.
The site yielded 1292 artifacts, including the ceramic vessel likely used for cooking, and a hearth containing charcoal that later tests suggested dates from 1,400 B.C. “We think we have proofs of just one short-term occupation,” Grossman-Bailey said.
Ilene Grossman-Bailey was senior archaeologist on two Camden excavations that yielded about 10000 Native American artifacts. She has long been interested in the city history.
But a single acre of ground north of the Newton Creek and west of Broadway, on the former shipyard, now Holtec property — was excavated to a depth of between 2 to 5 feet, and was a wider and older window into the past.
Residue found on artifacts such as grinding stones and hammer stones used to prepare food suggest that peoples on the site consumed maize, legumes, and barley/wild rye. And burned animal bones, as well as protein residue found on one tool, suggested that people at the site at some point hunted, as well as gathered, food, said Grossman Bailey.
Evidence for what she also described as “the processing and cooking of deer and other mammals, turtles, and wild fowl” also was discovered among the 7,458 artifacts.
These included Hundred ceramic fragments and 11 “prehistoric features, including an enigmatic ditch/structural feature” that was “Twenty feet long, three feet wide and chock full of artifacts,” Grossman-Bailey said.
Arrowhead and other projectile points unearthed during an archaeological dig during construction of the Holtec International complex in Camden.
“We don’t really know what it is. There really isn’t anything else like it in New Jersey, although similar features have been discovered near the Chesapeake and in New England,” she added. “It could represent the remains of a structure. It almost suggests you might have the remains of a house.”
The presence on the site of features made by human beings suggests that what may have begun as a temporary encampment grew into something larger and more permanent.
“We seem to have a variety of things going on there, and different periods represented, based on radiocarbon dating and the artifacts,” Grossman-Bailey said.
“As time went on, something a bit more complex, maybe with people staying there longer, maybe living there year round … may have occurred.”
Aside from a smattering of “Indian towns” on early maps made by European arrivals, little proof has been found to suggest substantial settlements of Native Americans existed in what is now South Jersey, at least in the late 17th-century.
“We do know of transient settlement that reflected the seasonal food ways of Native Americans,” said Paul Schopp, assistant director of the South Jersey Culture and History Center at Stockton University.
Grossman Bailey, who earned a Ph.D. in anthropology at Temple and lives in Morrisville, said she has long been interested in the history of Camden, where her father was born and her grand father owned a furniture stores.
And she said perhaps the greatest significance of the findings may be the suggestion that more such site, as yet undiscovered, may lie beneath the city.