New research from anthropologists at McMaster University and
California State University, San Bernardino (CSUSB), is shedding light
on ancient dietary practices, the evolution of agricultural societies
and ultimately, how plants have become an important element of the
modern diet.
Researchers examined plant remains found on ceramic artifacts such
as bowls, bottles and jars, and stone tools such as blades and drills,
dating to the Early Formative period (2000-1000 BCE), which were
excavated from the village site of La Consentida, located in the coastal
region of Oaxaca in southwest Mexico.
They focused on remnants of starch grains, which are where plants
store energy, and phytoliths, also known as 'microfossils,' a rigid,
microscopic structure made of silica which is produced by plants and can
survive the decay process. Both types of microbotanical remains are
routinely recovered from artifacts to analyze ancient foodways.
A careful analysis found the remains of flowering plants, wild bean
families and grasses, including maize. The findings support existing
evidence that the village was transitioning from a broad, Archaic period
(7000-2000 BCE) diet to one based on agriculture.
"This is an important piece of the puzzle. The work provides us with
a better idea of how plants became cultivated and how they made their
way to our plates," explains Éloi Bérubé, a graduate student in the
Department of Anthropology at McMaster University, who conducted the
work with advisor Shanti Morell-Hart, an assistant professor of
anthropology.
"It gives us a more complete understanding of the daily activities
that played a significant role in ancient societies," he says.
For example, researchers found maize microfossils pointing to the
storage and processing of different parts of the plant, as well as
indications of heat damage, likely caused by cooking. Evidence of maize
and wild beans was also found in artifacts used for burial offerings.
"The Early Formative was a key moment of social transformation for
native peoples of Mesoamerica," says Guy Hepp, director of the La
Consentida Archaeological Project and assistant professor of
anthropology at CSUSB. "La Consentida was among Mesoamerica's earliest
villages, and these new dietary results help us better understand some
of the changes the community was experiencing, including a shift toward
permanent settlements and the beginnings of social complexity."
Combined with other evidence from the site, including variations in
burial offerings and the diversity of human depictions in small-scale
ceramic figurines, this study suggests that the community was in the
early stages of establishing a complex social organization.
The artifacts considered for the study come from a variety of
contexts at La Consentida, including mounded earthen architecture, the
spaces around ancient houses, and even human burials.
Pottery from the site includes jars used in domestic and communal
cooking events and likely also for storage. Some of the jars were later
reused as offerings with human burials. Decorative bowls were likely
used for serving foods at communal feasts. Ceramic bottles, also found
in feasting refuse, likely held beverages brewed from maize and possibly
even cacao