The long-term disposal of refuse can result in stratified deposits, which are useful for relative dating. A epoch of the upper Tertiary period, spanning the time between 23.8 and 5.3 million years ago. A period of the Paleozoic era, spanning the time between 360 and 325 million years ago. It is named after the Mississippi River valley, which contains good exposures of rocks of this age. Usually calculated from the most abundant bone or tooth from either the left or right side of the animal.
Moraines appear as hill or ridges marking original glacial limits.
The study of form and structure of animals and plants and their fossil remains. Human evolution shows a mosaic pattern in the fact that small canine teeth, large brains, and tool use did not all evolve at the same time. It involves the measurement of the gamma radiation absorbed by the iron nuclei, which provides information on the particular iron compounds in the sample. An instance of positive feedback, it is thought by some to be one of the primary mechanisms of societal change. A preserved body wrapped in cloth.