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It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together.
The buildings on the Athenian Acropolis were important for trade and worship.
Prior to the development of radiocarbon dating, it was difficult to tell when an archaeological artifact came from.
Unless something was obviously attributable to a specific year -- say a dated coin or known piece of artwork -- then whoever discovered it had to do quite a bit of guesstimating to get a proper age for the item.
The research builds on recent work that has shed light on the types and uses of commodities contained within the vessels. 30 edition of Analytical Chemistry, a peer-reviewed journal of the American Chemical Society, the world's largest scientific society.
Pottery is essential for classifying archaeological sites.
The new analytical technique will allow archaeologists to more accurately determine the age of pottery and, by extension, the age of associated artifacts and sites.
For the most part, radiocarbon dating has made a huge difference for archaeologists everywhere, but the process does have a few flaws.
For example, if an object touches some organic material (like, say, your hand), it can test younger than it really is.
Aerial Photography - The various techniques of taking photographs of natural or cultural features from the air, using balloons, airplanes, satellites, and other sources, in order to study the features in their entirety from a top-down (bird's eye) view.
Aerial Reconnaissance - The technique of searching for sites and features, both cultural and natural, from the air, often using aerial photography or the human eye.
Also, the larger the sample the better, although new techniques mean smaller samples can sometimes be tested more effectively.