Alidade - An optical surveyor's instrument used in the field to create topographic maps and top plans.
Today alidades are being replaced by Total Stations.
AMS - Accelerator Mass Spectrometry is an absolute dating technique that measures the amount of carbon-14 in an organic object and provides a rough indication of its age. Anthropology - The study of human beings, including their behavior, biology, linguistics, and social and cultural variations.
In the United States, anthropology is divided into four sub-disciplines: archaeology, biological/physical anthropology, cultural anthropology, and linguistics.
More flakes were knocked off from both sides of a stone and there is evidence that the maker had a preconceived notion of the tool's final form.
This tool-making technology was a more complex way of making stone tools than the earlier Oldowan technology.
All the sub-disciplines study aspects of past or present humans.
Archaeologists generally study the physical and material remains of ancient societies, while cultural anthropologists study living cultures.
Archaeoastronomy - The study of ancient astronomical knowledge and its role in past cultures. - Before Present; used in age determination instead of B. Balks are often left to aid with stratigraphic analysis.
Archaeology - The scientific excavation and study of ancient human material remains. Benchmark - For excavation purposes, a permanent point at a known elevation that can be used to measure other elevations during excavation . Biface tools - Stone tools that have been worked on both sides or faces, meaning that flakes have been intentionally (not naturally) chipped off from both sides of the stone.