El Abra

El Abra is an Archaeological excavation site, located in the same name valley, east to the city of Zipaquirá, department Cundinamarca, Colombia; in the Altiplano Cundiboyacense, at an altitude of 2.570m. This cave system is one of the first Human settlements in America, used by the Homo sapiens inhabitants of the late pleistocene epoch.

Stratigraphy

The first research in the place was developed in 1967, and the stratigraphy of lithic instruments, bones and vegetal charcoal with radiocarbon dating established the date of the settlement in 12.400 BCE ± 160 years.

Archaeological Research

In 1960, the Indiana University collaborated in a more deep research. In 1970 the Netherlands Foundation for the Advancement of Tropical Research (NWO-WOTRO)discovered 4 new Pre-pottery sites and the analisis of lake sediments allowed a more accurate understanding of the original weather and flora

"Fúquene" stadial

From 15000 BCE to 12500 BCE.Itis characterized by a cold weather, flora typical of Páramo ecosystem and stone tools

Guantiva interstadial

12.500 years ago, a gradual rise of temperature allowed the growing of andean cloud forest and the settlement of many animal species,making easier the hunting. Of this period are the "abrienses" flint (tool)s, and chopper cores. While the weather was more benign, the cave system was being gradually less used.

Tibitó stadial

The excavations of this period, near Tocancipá town, dated 11400 years BCE, shows lithic instruments, Bone instruments and remains of Pleistocenic fauna, such as mastodons ("Haplomastodon" and "Cuvieronius hyodon"), American horse ("Equus amerhipuus lasallei"), and deer ("Odocoileus virginianus") with traces of ritual ceremonies.

El Abra stadial

Dated 11.000 BCE, it is characterized by a new cooling of the weather, recession of the forests and a last glaciation. From this period the archaeological places of Tequendama Falls in Soacha shows lithic instruments ("tequendamenses tools") with a more smooth manufacture, many of them made with materials bring to this places from the Magdalena river valley, such as Quartzite.

Holocene

10000 years BCE the last glaciation ended, the andean forest appeared again. The lithic instruments shows a rise in the recollecting activities, with rodents and vegetables consume, and low amount of large animals hunting. The Abra caves were abandoned gradually

Aguazuque

5.000 BCE the agriculture was stablished in terraces, grinding stone instruments can be observed in association with itinerant habits. "abriense" type instruments disappear.

References

*Correal Urrego, Gonzalo 1980: "Estado actual de las investigaciones sobre la etapa lítica en Colombia"; "Antropológicas" 2:11-30. Colombian Antropologic Society, Bogotá.:1990: "Evidencias culturales durante el Pleistoeno y Holoceno de Colombia"; "Revista de Arqueología Americana", 1:69-89. Instituto Panamericano de Geografía e Historia, México.
*Correal, Gonzalo; Thomas van der Hammen and J.C. Lerman 1970: "Artefactos líticos de abrigos en El Abra, Colombia"; "Revista Colombiana de Antropología" 14: 9-46.
*Hurt, Wesley; T. van der Hammen and Correal, G. 1976: "La ecología y tecnología de los abrigos rocosos en El Abra, Sabana de Bogotá, Colombia"; "Boletín de la Sociedad Geográfica Colombiana" XXX (109): 1-21. Bogotá.
*Van der Hammen, Thomas y E. González 1963: "Historia de clima y vegetación del Pleistoceno suprior y Holoceno de la Sabana de Bogotá"; "Boletín Geológico" XI (1-3): 189-266. Bogotá.
*Van der Hammen, T. and Correal, G. 1978: "Prehistoric man on the Sabana de Bogota: data for an ecologiacal prehistory"; "Paleography, Paleoclimatology, Paleoecology" 25:179-190. :"El hombre prehistórico en la Sabana de Bogotá: datos para una prehistoria ecológica"; Thomas van der Hammen 1992: "Historia, Ecología y Vegetación": 217-231. Corporación Araracuara; Bogotá ISBN 958-95379-4-4