Excavation photos of the earthwork of Altheim from 1914 show a fully-developed Luvisol (para-brown earth). In 2012, fieldwork recommenced at the site and revealed a second ditched enclosure as well as the serious impact of soil erosion: In the course of a century about 0.4 m of the ditch feature has been lost. In comparison with the total amount of erosion since the creation of the earthwork in the 37th/36th century BC the loss of soil material has dramatically accelerated during the past century.
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