The Las Vegas culture was a pre-ceramic society that inhabited the Santa Elena Peninsula on the coast of present-day Ecuador between approximately 8000 and 4600 BCE. Named after the prominent Site No. 80 near the Las Vegas River, now within the city of Santa Elena, it represents one of the earliest sedentary adaptations to a complex coastal environment in South America. The culture is notable for its early experimentation with agriculture, including the domestication of squash, bottle gourd, and later maize, alongside a subsistence strategy based on hunting, fishing, and foraging. Archaeological evidence from at least 32 sites, including one of the largest known burial grounds in South America, provides insight into the Las Vegas people's social organization, settlement patterns, and adaptation to environmental changes such as rising sea levels.
Setting The Las Vegas culture flourished on the coast of Ecuador along the Santa Elena Peninsula from approximately 8000 to 4600 BCE. As one of the earliest known settlements in Ecuador, it is significant for its early domestication of plants like squash and maize and for containing one of the largest preceramic burial sites in South America, with remains of at least 192 individuals. The Santa Elena Peninsula forms the northernmost part of a coastal desert that stretches for some 3,000 kilometres (1,900 mi) along South America's Pacific coast. The regional climate is arid, with the city of Santa Elena receiving only about 250 millimetres (9.8 in) of precipitation annually, almost entirely between January and March. Influenced by the cool Humboldt Current, temperatures are mild, averaging 23 °C (73 °F) with minimal seasonal variation. The natural coastal vegetation is xeric, dominated by cacti and other desert plants. Inland, precipitation increases, and the landscape transitions from desert to seasonally dry forest. Ten thousand years ago, sea levels around the peninsula were about 30 metres (98 ft) lower than today. Consequently, known Las Vegas settlements were located further inland, and some ancient sites have likely been submerged by subsequent sea-level rise. The dry climate and xeric vegetation appear to have persisted throughout this period. Sea levels began rising around 7000 years ago, reducing the habitable land area. This environmental shift, along with tectonic activity, affected the subsistence patterns of the Las Vegas people, as evidenced by dietary changes between the early and late phases. Faunal and plant remains, including grasses and shrubs indicative of a dry climate, suggest a forested environment that was not wet enough to become a wetland forest. The prolonged annual dry season is typical of regions suitable for maize cultivation. These conditions—rising seas and a seasonal dry climate—may have motivated the Las Vegas people to intensify plant domestication and marine resource gathering. Archaeologists have identified thirty-two Las Vegas sites scattered across the peninsula, primarily along the Rio Grande and its tributaries, including the Las Vegas River, within an area of about 25 kilometres (16 mi) east-west by 12 kilometres (7.5 mi) north-south. Additional contemporary sites likely remain undiscovered along hundreds of miles of the Ecuadorian coast. Before the sea-level rise, the coastline supported mangrove swamps, and mangrove clams were a staple of the Las Vegas diet. As sea levels rose, the mangroves declined, and after approximately 6000 BCE, mangrove clams significantly decreased in Las Vegas archaeological assemblages. A contemporaneous ancient culture in the region was the Real Alto culture, which existed between 6000 and 3800 BCE.
Description Evidence of a human presence on the Santa Elena Peninsula dates to 8800 BCE, but the archaeological record becomes substantially more extensive with the onset of the Las Vegas period around 8000 BCE. Archaeologists divide the culture into two phases: Early Las Vegas (8000–6000 BCE) and Late Las Vegas (6000–4600 BCE), with the division marked by a gap in the stratigraphic record at a key site. The culture was pre-ceramic, meaning its people did not produce or use pottery. Sites were typically established on low hills in areas that provided access to both marine and terrestrial resources. Analysis of faunal remains indicates the diet was split roughly equally between terrestrial and marine animal protein. Human remains from these sites suggest the population was generally healthy and showed no signs of anemia.
Early Las Vegas (8000–6000 BCE) During the Early Las Vegas period, the primary social and economic unit was the small, relatively self-sufficient family. These family groups were flexibly organized to carry out a wide range of subsistence tasks using a few generalized tools. They lived in small, flimsy structures and likely moved between sites to exploit seasonal food sources. Their subsistence strategy was that of broad-spectrum hunters and gatherers, exploiting a variety of habitats including the desert, dry tropical forest, and Pacific coast. Hunted game included deer, peccary, rabbit, fox, rodents, opossum, and various reptiles and birds. Intertidal species and crabs were also harvested in small quantities. This diverse diet demonstrates a adaptive strategy that did not rely heavily on any single food source.
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