Dating glass by color archaeology

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Even then the bottles discussed in depth are so primarily to illustrate the presented information and concepts.The level of heterogeneity reflects the social and economic differentiation of the time period.The discussion will be limited to three artifact categories: ceramics, glass, and structural materials.These changes sometimes left temporally sensitive indications at the level of the artifact.The reader must appreciate that as one comes closer to the present the diversity of artifact types increases geometrically.The style of the artefact and its archaeology location stratigraphically are required to arrive at a relative date.For example, if an artefact, say an oil lamp, is found co-located on the same floor of a governor's dwelling, and that floor can be dated in archaeology terms by reason of the patterns employed in the mosaic, then it is assumed that in relation to the floor that the lamp is of the same age.The underlying principle of stratigraphic analysis in archaeology is that of superposition.This term means that older artefacts are usually found below younger items.Although color is one of the more obvious and relatively easy to describe attributes of a historic bottle, it is unfortunately of limited utility in classifying a bottle as to age or type.One of the better discussions on this is from The Parks Canada Glass Glossary by Jones & Sullivan (1989), and is quoted below:"Because colour is a universal attribute of glass and is convenient for mending and establishing minimal vessel counts, it has been latched onto by some archaeologists as a classification device.

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