Download e-book for kindle: Alluvial Geoarchaeology: Floodplain Archaeology and by A. G. Brown

By A. G. Brown

ISBN-10: 0511607822

ISBN-13: 9780511607820

ISBN-10: 0521560977

ISBN-13: 9780521560979

ISBN-10: 052156820X

ISBN-13: 9780521568203

This complete technical handbook is designed to provide archaeologists the required historical past wisdom in environmental technological know-how required to excavate and examine archaeological websites through rivers and on floodplains. Bringing jointly info at the evolution and exploitation of floodplain and river landscapes, this article attracts on examples from Britain, Europe, North the USA and Australasia. an immense subject matter is the interplay among climatic and cultural forces and the transformation of riverine environments.

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Additional resources for Alluvial Geoarchaeology: Floodplain Archaeology and Environmental Change (Cambridge Manuals in Archaeology)

Sample text

Secondly, the hydrological effects of catchment changes will vary with catchment size, location and climate of the area involved - it may, in some instances, need a significant proportion of the catchment to be changed, in order to have an observable effect on catchment hydrology, especially if the areas in question are far from channels. g. reservoir construction. During the Holocene, many floodplain reaches will have experienced both hydrological change and aggradation or degradation which may, or may not, have been causally linked.

If a river has occupied a valley for a considerable period of time, large events (in the broadest sense) are more likely to remove the evidence of smaller events than vice versa. So, paired terrace staircases can be viewed as, at best, a record of decreasingly smaller floodplains after the most geomorphologically active period in the catchment. Older deposits may be preserved under these terraces, especially in bedrock scour holes or at locations subsequently abandoned by the channel belt. These factors help to explain why it is unlikely that one river valley will have preserved terrace deposits from all the glacial/interglacial cycles known from the oceanic cores.

Bed/channel forms caused by flow divergence associated with pool and riffle formation. Bed/channel forms caused by flow divergence at high discharges and the development of braided river patterns. Can become part of the floodplain if stabilised by vegetation. Can also be formed by the dissection of point or alternating bars. Bed/channel forms which are produced by changes in flow at channel junctions and differences in the flow and/or sediment load between the main channel and tributary. Various causes from bank failure to bank sedimentation.

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Alluvial Geoarchaeology: Floodplain Archaeology and Environmental Change (Cambridge Manuals in Archaeology) by A. G. Brown


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