Omo


Omo

▪ anthropological and archaeological site, Ethiopia
 site of paleoanthropological excavations along the southern part of the Omo River in southwestern Ethiopia. Hominin (of human lineage) fossils unearthed there between 1967 and 1974 consist of about 200 teeth, four jaws, a partial skeleton, parts of two skulls, and a leg bone. The various layers have yielded remains from a broad and critical span of time in human evolution. Moreover, the geologic contexts and ages of the Omo material are known with precision, and the associated animal fossils provide a record of environmental change in eastern Africa.

      The earliest hominin remains, dating to about 3 million years ago (mya), resemble those from Hadar and Laetoli and are attributed to Australopithecus afarensis. Specimens of Paranthropus aethiopicus occur from 2.7 to 2.3 mya. By 2.2 mya some teeth with characteristics distinctive of P. boisei (Australopithecus) appear. Fossils of this species continue to be found in younger strata to 1.3 mya. An early species of Homo is represented by a few remains dating between 2.6 and 1.3 mya, with H. ergaster or H. erectus (Homo erectus) appearing at 1.4 mya. Much later in time (perhaps 130,000 years ago), near-modern Homo sapiens is present. Oldowan (Oldowan industry) stone tools first appear between 2.4 and 2.3 mya.

      The Omo River region is rich in fossils because the area was once highly volcanic. The layers of ash—easily dated by the potassium-argon (potassium-argon dating) method—reveal that the area, now an arid wasteland, was once a fertile region with several rivers and lush forests.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Omo — steht für: Omo (Fluss), Fluss im Südwesten Äthiopiens Omo Nationalpark, Nationalpark im Südwesten Äthiopiens Omo Kibish im Tal des Omo, Fundstätte der homininen Fossilien Omo 1 und Omo 2 Omo 1 und 2, zwei Fossilien, die zu den ältesten Funden von …   Deutsch Wikipedia

  • Omo 1 — et Omo 2 Pour les articles homonymes, voir OMO. Omo 1 et Omo 2 sont les noms attribués à deux crânes découverts à Kibish, en Éthiopie, en 1967. Leur nom est emprunté à celui de la rivière Omo au sud de laquelle se trouve le site de leur… …   Wikipédia en Français

  • Omo 2 — Omo 1 et Omo 2 Pour les articles homonymes, voir OMO. Omo 1 et Omo 2 sont les noms attribués à deux crânes découverts à Kibish, en Éthiopie, en 1967. Leur nom est emprunté à celui de la rivière Omo au sud de laquelle se trouve le site de leur… …   Wikipédia en Français

  • Omo — or OMO may refer to: Omo remains, a collection of hominid bones Omo River in southern Ethiopia Omo Island, Denmark Omo National Park, in Ethiopia Open market operations, by the Federal Reserve or other central banks Omo (detergent), a detergent… …   Wikipedia

  • OMO — or OMO may refer to: the IATA airport code for Mostar International Airport Omo River in southern Ethiopia Omo Remains collection of hominid bones Omo National Park in Ethiopia Open market operations by the Federal Reserve or other central banks… …   Wikipedia

  • omo — omo·hy·oi·de·us; omo·pho·ri·on; omo·plate; omo·pla·tos·co·py; omo·sternum; omo·hyoid; …   English syllables

  • Omo'a — Omo‘a (or Omoa) is the name of a small town and valley at the head of a bay by the same name, on Fatu Hiva. The bay of Omo‘a is the southernmost bay on the western coast of Fatu Hiva, and provides a good anchorage. The village of Omo‘a was home… …   Wikipedia

  • Omo — puede referirse a: Omø, una isla de Dinamarca. Omo, una marca de detergente. Esta página de desambiguación cataloga artículos relacionados con el mismo título. Si llegaste aquí a través de …   Wikipedia Español

  • omo- — before vowels om , word forming element meaning raw, unripe, from Gk. omo , comb. form of omos raw, from PIE root *omo (Cf. Skt. amah raw, uncooked, unripe, O.Ir. om, Welsh of) …   Etymology dictionary

  • Omö — Omø oder Omö ist eine dänische Insel zwischen Smålandshavet und dem Großen Belt vor Seeland. Die Insel wird in den Sommermonaten von vielen Touristen besucht. Besonders der Yachthafen ist ein beliebtes Reiseziel. Einwohner: 187 (1. Januar 2006).… …   Deutsch Wikipedia

  • Omo — Omo, Fluß der abessin. Landschaft Kassa, wo er als Gibie auf der Wasserscheide gegen den Abai (Blauer Nil) entspringt; er nimmt rechts den Godscheb, Bilimo u.a., links den Abfluß der Seen Dembel, Hogga und Buturline auf und mündet, im Unterlauf… …   Meyers Großes Konversations-Lexikon


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.