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Concept
Archaeological excavation
Summary
In archaeology, excavation is the exposure, processing and recording of archaeological remains. An excavation site or "dig" is the area being studied. These locations range from one to several areas at a time during a project and can be conducted over a few weeks to several years.
Excavation involves the recovery of several types of data from a site. This data includes artifacts (portable objects made or modified by humans), features (non-portable modifications to the site itself such as post molds, burials, and hearths), ecofacts (evidence of human activity through organic remains such as animal bones, pollen, or charcoal), and archaeological context (relationships among the other types of data).
Before excavating, the presence or absence of archaeological remains can often be suggested by, non-intrusive remote sensing, such as ground-penetrating radar. Basic information about the development of the site may be drawn from this work, but to understand finer details of a site, excavation via augering can be used.
During excavation, archaeologists often use stratigraphic excavation to remove phases of the site one layer at a time. This keeps the timeline of the material remains consistent with one another. This is done usually though mechanical means where artifacts can be spot dated and the soil processed through methods such as mechanical sieving or water flotation. Afterwards, digital methods are then used record the excavation process and its results. Ideally, data from the excavation should suffice to reconstruct the site completely in three-dimensional space.
The first instance of archaeological excavation took place in the sixth century BC when Nabonidus, the king of Babylon, excavated a temple floor that was thousands of years old. During early Roman periods, Julius Caesar's men looted bronze artifacts, and by the medieval period, Europeans had begun digging up pots that had partially emerged from erosion, and weapons that had turned up on farmlands.
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