Gater, J. A. and Cockcroft, T. (2022). Geophysical Survey at Norton Fitzwarren Hillfort, Norton Fitzwarren, Somerset. Sumo Geophysics. https://doi.org/10.5284/1110296. Cite this using datacite

Title
Title
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Title:		 Geophysical Survey at Norton Fitzwarren Hillfort, Norton Fitzwarren, Somerset
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Series:		 SUMO Geophysics Limited unpublished reports
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Downloads:
sumogeop1-505861_188354.pdf (7 MB) : Download
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Creative Commons Attribution 4.0 International Licence icon
Creative Commons Attribution 4.0
International Licence
DOI
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DOI
https://doi.org/10.5284/1110296
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Publication Type:		 Report (in Series)
Abstract
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Abstract:		 A temporary grid system was established over the site and marked out using canes. The location of the grid will be set out using an RTK GPS system theoretically accurate to some 0.01m and referenced to OS co-ordinates. Data will be collected using a cart carrying four paired Bartington magnetic sensors. Four sensors mounted 1m horizontally apart and very accurately aligned to nullify the effects of the earth’s magnetic field. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. Each data point is geographically referenced using an on-board Trimble RTK survey grade GPS system. Readings will be taken at 0.125m centres along traverses 1.0m apart. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. At the end of every data collection a zone of data was recollected as a control. The magnetometer survey has identified a number of features of archaeological interest and there is generally very good correlation with the aerial photographic evidence; the geophysical data has the advantage of being accurately georeferenced making any targeted excavation far easier to locate. The results confirm the presence of a number of enclosures, many on a similar alignment; a few ring ditches, some well-defined, others less so; several pit-like responses plus tentative fired features. Short lengths of tracks are visible near the entrances, but these cannot be traced across the fort.
Author
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Author:		 John A Gater
Thomas Cockcroft
Publisher
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Publisher:		 Sumo Geophysics
Year of Publication
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Year of Publication:		 2022
Locations
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Locations:
Parish: Norton Fitzwarren
County: Somerset
Country: England
District: Somerset West and Taunton
Grid Reference: 319625, 126261 (Easting, Northing)
Subjects / Periods
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Subjects / Periods:
LATER PREHISTORIC DITCHED ENCLOSURE (Tag)
DITCH (Monument Type England)
LATER PREHISTORIC TRACKWAY (Tag)
LATER PREHISTORIC OVEN (Tag)
RING DITCH (Monument Type England)
TRACKWAY (Monument Type England)
DITCHED ENCLOSURE (Monument Type England)
MAGNETOMETRY SURVEY (Event)
LATER PREHISTORIC RING DITCH (Tag)
GEOPHYSICAL SURVEY (Event)
OVEN (Monument Type England)
LATER PREHISTORIC DITCH (Tag)
LATER PREHISTORIC (Historic England Periods)
Identifiers
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OASIS Id: sumogeop1-505861
Report id: 05788
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OASIS (OASIS)
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Created Date
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Created Date:		 12 Jul 2023