| Title: |
Sweetbriar Solar Farm, Ulceby, North Lincolnshire Geophysical Survey Report |
| Series: |
Northern Archaeological Associates unpublished report series
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| Downloads: |
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northern1-515502_211240.pdf (14 MB)
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| Licence Type: |
ADS Terms of Use and Access
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| DOI |
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| Publication Type: |
Report (in Series)
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| Abstract: |
Northern Archaeological Associates (NAA) was commissioned by Arcus Consultancy
Services to undertake a geophysical (gradiometer) survey on land at Sweetbriar Farm,
Ulceby, North Lincolnshire in advance of a solar farm development (NGR: TA 11284
17238).
All survey work was completed to appropriate standards set out in current guidelines
(CIfA 2014; Schmidt et al. 2015). The gradiometer survey used Bartington Grad601-2
dual magnetic gradiometer systems with data loggers. Readings were recorded at a
resolution of 0.01nT and data was collected with a traverse interval of 1m and a sample
interval of 0.25m. The survey data was collected with reference to a site survey grid
comprised of individual 30m x 30m squares. The grid was established using Real Time
Kinematic (RTK) differential GPS equipment, and was marked out using non-metallic
survey markers. All grid nodes were set out with a positional accuracy of at least 0.1m
and could be relocated on the ground by a third party. The base lines used to create the
survey grids are shown on Figure 2 and further details are available in Appendix A.
The processing was carried out using Geoplot 3.0 software and consisted of standard
processing procedures. Details of processing steps applied to collected data are
provided in Appendix B.
On the greyscale plots, positive readings are shown as increasingly darker areas and
negative readings are shown as increasingly lighter areas (Figs 3, 4, 6 and 8).
Interpretation of identified anomalies is generally achieved through analysis of anomaly
patterning and increases in magnetic response and is often aided by examining
supporting information. The interpreted data uses colour coding to highlight specific
readings in the survey area (Figs 5, 7 and 9). Appendix C details the terminology and
characterisation of anomalies used for interpreting data. NAA undertook a geophysical survey over six fields—totalling 43ha—located to the
north of the village of Ulceby in North Lincolnshire.
The results of the survey largely relate to agricultural activity, modern features and
geological or pedological changes in the substrata. It is possible that identified linear
anomalies and trends may in part relate to infilled features, but their weak increases in
magnetic value and fragmented patterning has resulted in a tentative interpretation. It is
equally plausible that identified anomalies and trends are instead agricultural or
geological in nature. The most convincing anomaly is in the centre of the PDA and
comprises an isolated linear anomaly with incomplete patterning and so is of an
unknown origin.
Numerous field boundaries were identified that were present on the 1886 and 1887 OS
maps. Evidence of land drains appears commonly across the PDA, as well as weakly
enhanced linear anomalies that are of an unknown agricultural origin. The most
convincing evidence of ridge and furrow is located in the south of the PDA, but a very
tentative interpretation applies due to the weak increases in magnetic value
The results have also identified isolated bipolar anomalies, linear bipolar anomalies
(indicative of buried utilities), and areas of modern disturbance, as well as several areas
of magnetic disturbance that are likely to be of a geological origin. |
| Author: |
Alice James
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| Publisher: |
Northern Archaeological Associates
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| Year of Publication: |
2021
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| Locations: |
| County: |
Lincolnshire |
| District: |
North Lincolnshire |
| Country: |
England |
| Parish: |
Ulceby |
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Grid Reference: 511282, 417237 (Easting, Northing)
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| Subjects / Periods: |
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| Identifiers: |
| OASIS Id: |
northern1-515502 |
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| Source: |
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| Created Date: |
10 Jul 2023 |
