25.20). Full definitions of the interpretation terms used in this report are provided in Section 1.6.4.
137. Numerous ferrous anomalies are visible throughout the detailed survey dataset. These are presumed to be modern in provenance and are not referred to, unless considered relevant to the archaeological interpretation.
1.6.5.2 Gradiometer Survey Results and Interpretation 138. The anomalies of greatest archaeological interest are a group of positive anomalies around 4000; several of these anomalies appear to form a near perfect circle in the data. The stronger ditch sections on the north-eastern side of this ring have strong magnetic values over +3nT but these weaken to less than +0.5nT on the south- western side. This difference in strength of response appears to be defined by a relatively modern drainage/boundary feature at 4007 that cuts through the ring ditch. This may indicate that agricultural activity to one side of this possible boundary resulted in greater destruction of the archaeological deposits here. It is possible that other features may have existed nearby but have been almost entirely ploughed out. The ring ditch is considered to be archaeological although not enough of it is clearly visible to allow it to be identified as either a round barrow or a roundhouse. The strongest regions are classed as archaeology and the weaker regions are classed as probable archaeology or are defined as a trend.
139. There are few other anomalies of interest elsewhere with only two anomalies classed as probable archaeology at 4001 and 4002; both of these features are positive short ditch sections with values over +3nT. Neither one of them appears to relate to a modern agricultural feature although it is unclear what function they may have served.
140. There are numerous linear ditch sections spread throughout the data at 4003 to 4010; all of these features have positive values around +2nT and are aligned parallel to existing field boundaries. These features are considered to represent ditch sections but are likely to relate to recent agricultural activity given their layout. They have all been classed as possible archaeology as a result.
141.
In addition to these ditches there are a number of ceramic field drains visible in the data such as around 4012. They are not considered to be of archaeological significance.
142. The remaining anomalies include weak linear trends of uncertain origin such as those around 4010 and 4011, spreads of increased magnetic response (4013) and
Preliminary Environmental Information April 2014
East Anglia THREE Offshore Windfarm Appendix 25.1: Potential Archaeological Receptors Page 39
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