ANT-1 Lecture Notes - Lecture 17: Sahelanthropus, Prognathism, Relative Dating
Document Summary
Rift valley: tectonic plates rub together location of many geologic. Move smaller rangers of dates = more specific. A lot of limestone and limestone formations. Breccia = is a hard matrix of sand and pebbles and dirt/debris mixed with limestone dust; is almost cement like. Rely on biostratigraphy or other relative dating methods. Narrowing of the area behind the eye orbits. The brow ridge; the enlarged area of bone above the eye orbits. Referring to the anterior projection of the maxilla (upper jaw bone) Referring to a flattened or vertical maxilla. Referring to a ridge of bone along the sagittal suture. Referring to the roughened ridge of bone in the back of the skull (towards the base) where the neck muscles attach. Referring to a specimen that is relatively small and smoothly rounded. Referring to a specimen that has large and roughened muscle attachment sites. Lumps variation and groups fossils into a smaller number of species.
