Guilá Naquitz Cave in
Oaxaca
Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the political divisions of Mexico, Federative Entities of Mexico. It is ...
,
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
, is the site of early
domestication
Domestication is a sustained multi-generational relationship in which humans assume a significant degree of control over the reproduction and care of another group of organisms to secure a more predictable supply of resources from that group. ...
of several food crops, including
teosinte
''Zea'' is a genus of flowering plants in the grass family. The best-known species is ''Z. mays'' (variously called maize, corn, or Indian corn), one of the most important crops for human societies throughout much of the world. The four wild sp ...
(an ancestor of
maize
Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. Th ...
),
squash
Squash may refer to:
Sports
* Squash (sport), the high-speed racquet sport also known as squash racquets
* Squash (professional wrestling), an extremely one-sided match in professional wrestling
* Squash tennis, a game similar to squash but pla ...
from the genus ''
Cucurbita
''Cucurbita'' (Latin for gourd) is a genus of herbaceous fruits in the gourd family, Cucurbitaceae (also known as ''cucurbits'' or ''cucurbi''), native to the Andes and Mesoamerica. Five edible species are grown and consumed for their flesh and ...
'',
bottle gourds (''Lagenaria siceraria''), and
beans
A bean is the seed of several plants in the family Fabaceae, which are used as vegetables for human or animal food. They can be cooked in many different ways, including boiling, frying, and baking, and are used in many traditional dishes th ...
.
This site is the location of the earliest known evidence for domestication of any crop on the continent, ''
Cucurbita pepo
''Cucurbita pepo'' is a cultivated plant of the genus ''Cucurbita''. It yields varieties of winter squash and pumpkin, but the most widespread varieties belong to the subspecies ''Cucurbita pepo'' subsp. ''pepo'', called summer squash.
It has b ...
'', as well as the earliest known domestication of maize.
Macrofossil
Macrofossils, also known as megafossils, are preserved organic remains large enough to be visible without a microscope. The term ''macrofossil'' stands in opposition to the term microfossil. Microfossils, by contrast, require substantial magnific ...
evidence for both crops is present in the cave. However, in the case of maize, pollen studies and geographical distribution of modern maize suggests that maize was domesticated in another region of Mexico.
Location
The cave is northwest of
Mitla
Mitla is the second-most important archeological site in the state of Oaxaca in Mexico, and the most important of the Zapotec culture. The site is located 44 km from the city of Oaxaca, in the upper end of the Tlacolula Valley, one of the t ...
at the base of a cliff that rises above a semiarid valley floor at an elevation of . There are five
strata
In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
as deep as .
The entrance to the cave is .
It is at the very eastern end of the
Oaxaca Valley
The Central Valleys ( es, Valles Centrales) of Oaxaca, also simply known as the Oaxaca Valley, is a geographic region located within the modern-day state of Oaxaca in southern Mexico. In an administrative context, it has been defined as comprising ...
.
Occupation
While the earliest human evidence in Guilá Naquitz Cave dates to about 10,750 years
BP, inhabitation was not continual and was not year-long. Humans ceased living in the cave about 500 BP. Humans lived in the cave six separate timeframes from about 10,750 to 8,900 years BP and again from about 1,300 to 500 years BP. The earlier inhabitants were pre-ceramic hunter-gatherers who lived in the cave only from August to October–December.
Crop domestication
The earliest known evidence of the domestication of ''Cucurbita'', which is native to the
Americas
The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World.
Along with th ...
, dates back 8,000–10,750 years BP, predating the domestication of other crops such as
maize
Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. Th ...
and
bean
A bean is the seed of several plants in the family Fabaceae, which are used as vegetables for human or animal food. They can be cooked in many different ways, including boiling, frying, and baking, and are used in many traditional dishes th ...
s in the region by about 4,000 years.
This evidence was found in the Guilá Naquitz Cave and four other Mexican caves during a series of excavations in the 1960s, possibly beginning in 1959.
Further excavations at the Guilá Naquitz site were carried out in the 1970s by a team led by
Kent V. Flannery
Kent Vaughn Flannery (born 1934) is a North American archaeologist who has conducted and published extensive research on the pre-Columbian cultures and civilizations of Mesoamerica, and in particular those of central and southern Mexico. He has a ...
from the
University of Michigan
, mottoeng = "Arts, Knowledge, Truth"
, former_names = Catholepistemiad, or University of Michigania (1817–1821)
, budget = $10.3 billion (2021)
, endowment = $17 billion (2021)As o ...
.
Subsequent more accurate dating using
accelerator mass spectrometers provided more specific dates. Solid evidence of domesticated ''C. pepo'' was found in the Guilá Naquitz Cave in the form of increasing
rind thickness and larger
peduncles in the newer
stratification layers of the cave. By circa 8,000 years BP the ''C. pepo'' peduncles found are consistently more than thick. Wild ''Cucurbita'' peduncles are always below this barrier. Changes in fruit shape and color indicate intentional breeding of ''C. pepo'' occurred by no later than 8,000 years BP.
During the same time frame, average rind thickness increased from to .
The process to develop the agricultural knowledge of crop domestication took place over 5,000–6,500 years in Mesoamerica. Squash was domesticated first, with maize second and then beans being domesticated, becoming part of the
Three Sisters agricultural system of
companion planting
Companion planting in gardening and agriculture is the planting of different crops in proximity for any of a number of different reasons, including pest control, pollination, providing habitat for beneficial insects, maximizing use of space, and ...
.
References
External links
Guilá Naquitz Ancient Maize Maps
{{DEFAULTSORT:Guila Naquitz Cave
Cave sites in Mesoamerican archaeology
Early agriculture in Mesoamerica
Caves of Mexico