ANTH 1001 : Test 3
Document Summary
The big three : culture, brain size, bipedality. Regions: east africa, geology active volcanoes, dating narrow, precise dating, good for fossil preservation, south africa, geology, breccia very hard rock that incases fossil, dating biostratigraphy. Australopithecus: morphology small brained but slightly larger than. Australopithecus: this specimium is more derived, more evolved, than. East african species spread over area. At least 120 different individuals" fossils: cranial traits. Parallel dental arch with medium sized teeth: post cranial traits long arms relative to legs. Had ridge on radius often used for knucklewalking. Centrally located foramen magnum and significant bicondyler angle. No opposable toe: lucy (3. 2 mya) 1970s fossil. Important because of how complete she is (40%) complete) and shows clear adaptations for a form of bipedalism (early for bipedalism: selam (3. 3 mya) 1990s-2000s fossil. 3 years old when died by comparing to chimpanzees: site: laetoli (3. 5 mya) Volcanic eruption, lava cooled some, 2 individuals walked bipedally across it, footprints found.
