31:, being morphologically well suited to identification by this method. Some alignments run for large distances, in straight or curving lines, and clearly represent massive undertakings by large numbers of people or by smaller numbers over long periods of time. Some examples appear to have been left open for some time rather than being immediately backfilled and do not appear to have held timber posts; they can sometimes be seen to interact with other pre-existing monuments. Such features would not have formed a significant impediment to travel even if the soil removed from them were used to create a bank running parallel and it seems likely that they would have been used more as markers. In some cases a bank has survived and these monuments are referred to as embanked pit alignments. They may also occur as a series of segments following the same line, and are then referred to as segmented pit alignments.
71:
a double alignment of pits, possibly evidence of a timber processional avenue, extends from the southern henge. However, double and single alignments have been found together at a number of sites, some of which show alignments that switch between the two forms, so that the form cannot be taken as
27:, the function of which is at present poorly understood. They consist of a series of evenly spaced and often relatively shallow pits arranged in lines. These monuments are most frequently discovered through
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and represent agricultural boundaries. They may represent a period of agricultural intensification and population growth in the later Iron Age. Double pit alignments are thought to date to the later
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47:. It has been suggested that single pit alignments date principally from the
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and to be ritual in function, sometimes being found in relation to
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81:
7:
39:Pit alignments occur in two forms,
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143:Types of monuments and memorials
119:The Iron Age in Northern Britain
90:Prehistoric Britain from the Air
1:
103:European Bronze Age Monuments
164:
138:Stone Age sites in England
72:clear dating evidence.
115:Dennis William Harding
23:found throughout the
21:prehistoric monument
101:Martyn Barber 1999
148:Bronze Age Britain
69:Thornborough Henge
29:aerial photography
45:double alignments
41:single alignments
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88:Timothy Darvill
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61:cursus monuments
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19:are a type of
17:Pit alignments
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35:Possible uses
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25:British Isles
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132:Categories
57:Bronze Age
53:Neolithic
49:Iron Age
117:(2004)
105:, p. 21
92:p. 137
65:henges
121:p. 75
76:Notes
67:. At
63:and
43:and
55:or
134::
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