Trace, A. (2022). Geophysical Survey at Land West of Southwater, West Sussex. Wessex Archaeology. https://doi.org/10.5284/1100282. Cite this using datacite

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Title
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Title:		 Geophysical Survey at Land West of Southwater, West Sussex
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Series:		 Wessex Archaeology unpublished report series
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wessexar1-507588_189973_1.pdf (44 MB) : Download
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DOI
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DOI
https://doi.org/10.5284/1100282
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Publication Type:		 Report (in Series)
Abstract
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Abstract:		 The cart-based gradiometer system used a Leica Captivate RTK GNSS instrument, which receives corrections from a network of reference stations operated by the Ordnance Survey (OS) and Leica Geosystems. Such instruments allow positions to be determined with a precision of 0.02 m in real-time and therefore exceeds European Archaeologiae Consilium recommendations (Schmidt et al. 2015).The detailed gradiometer survey was undertaken using four SenSys FGM650/3 magnetic gradiometers spaced at 1 m intervals and mounted on a non-magnetic cart. Data were collected with an effective sensitivity of 0.03 nT at a rate of 10 Hz, producing intervals of 0.15 m along transects spaced 4 m apart. The gradiometer survey has been successful in detecting anomalies of possible archaeological origin across the site. In the west and east of the site possible ditched enclosures have been identified. The eastern enclosure also appears to have associated linear features directly west, which may relate to a possible throughway. This likely represents settlement activity dating to the Iron Age or Romano-British period, in keeping with recorded activity in the surrounding area.In the northern portion of the site multiple discreet circular features have been recorded that may relate to small ditch structures. The purpose of this area of activity is less clear than that in the east and west of the site based on the geophysical data alone. It could date anywhere from the Bronze Age through to the medieval period, with the possibility of multiple phases of activity. Ridge and furrow ploughing is evident in several areas of the site. Due to the curved form and wider spacing of the lines, it is likely that these are associated medieval methods of agricultural land management.Evidence of modern agricultural practises are present across the site in the forms of former field boundaries, footpaths, land drains, and ploughing. Several modern services have also been identified across the site.The remaining anomalies are thought to be modern or natural in origin. This includes ferrous debris and services.
Author
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Author:		 Alastair Trace ORCID icon
Publisher
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Publisher:		 Wessex Archaeology
Year of Publication
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Year of Publication:		 2022
Locations
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Locations:
County: West Sussex
Parish: Southwater
District: Horsham
Country: England
Grid Reference: 515538, 127639 (Easting, Northing)
Subjects / Periods
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Subjects / Periods:
GEOPHYSICAL SURVEY (Event)
MAGNETOMETRY SURVEY (Event)
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OASIS Id: wessexar1-507588
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Created Date
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Created Date:		 12 Oct 2022