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T. rex skull ZoomDinosaurs.com
Dinosaur
News
Oldest-known Dinosaurs Found in Madagascar
October 29, 1999

MadagascarThe world's oldest-known dinosaurs have been found on Madagascar, an island off the coast of SE Africa. These dinosaur fossils date from 230 million years ago during the Triassic period, when Madagascar was just splitting off from what would become Africa (it has been a part of the supercontinent Pangaea).

An international team of scientists led by John Flynn (of Chicago's Field Museum) found the fossils in a riverbed on Madagascar. The team included John Flynn, J. Michael Parrish (of the Northern Illinois University), Berthe Rakotosamimanana (of the Universite d'Antananarivo, Madagascar), William Simpson (of the Field Museum), and Robin Whatley and Andre Wyss (both from the University of California, Santa Barbara).

So far, only the jaw bones of these kangaroo-sized dinosaurs have been found. They were probably prosauropods, primitive, plant-eating dinosaurs that had a small head and a long neck. They walked on four legs, but could perhaps rear up on two legs to feed. The prosauropods may have led to the sauropods, familiar plant-eaters like Apatosaurus, Diplodocus, and Brachiosaurus.

Previously, the oldest-known dinosaur was Eoraptor, a meat-eater found in Argentina. Eoraptor dates from about 228 million years ago. The Eoraptor site was dated using radio-isotope analysis; the Madagascar site was dated using index fossils.

Reference: Nature (Sept. 2, 1999 ) and Science (Oct. 22, 1999). Press release.

RELATED LINKS
More information on sauropods, plant-eating dinosaurs.

A page on the dinosaur Eoraptor.

Information on the Triassic period.

Other fossils found in Africa (including Madagascar).

Chart of geological time


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