Cockcroft, T. (2022). Geophysical Survey at Thorney, Peterborough. Sumo Geophysics. https://doi.org/10.5284/1116774. Cite this using datacite

Title
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Title:		 Geophysical Survey at Thorney, Peterborough
Series
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Series:		 SUMO Geophysics Limited unpublished reports
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Downloads:
sumogeop1-503694_185988.pdf (13 MB) : Download
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Creative Commons Attribution 4.0
International Licence
DOI
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DOI
https://doi.org/10.5284/1116774
Publication Type
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Publication Type:		 Report (in Series)
Abstract
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Abstract:		 A temporary grid system will be 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. The magnetometer survey has recorded a couple of magnetic responses that have been interpreted as being of possible archaeological interest. Possible ring-ditches and other ditch-like response have been recorded which roughly correspond to the location of a Roman field system that is noted in the HER. The anomalies are magnetically weak but given the context archaeological origins cannot be dismissed. A number of linear responses have been interpreted as being of uncertain origin; they are likely to be due to a combination of underlying natural and modern agricultural processes. Former field boundaries, ploughing and land drains have also been mapped in the survey. The spreading of green waste across the site has caused an increase in the level magnetic background ‘noise’ with Area 11 being the worst affected.
Author
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Author:		 Thomas Cockcroft
Publisher
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Publisher:		 Sumo Geophysics
Other Person/Org
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Other Person/Org:		 Peterborough City Council HER (OASIS Reviewer)
Year of Publication
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Year of Publication:		 2022
Locations
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Locations:
County: Cambridgeshire
County: Peterborough
Parish: Thorney
Country: England
District: Peterborough
Grid Reference: 532592, 306169 (Easting, Northing)
Subjects / Periods
Subjects / Periods
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Subjects / Periods:
DITCH (Monument Type England)
PLOUGH MARKS (Monument Type England)
RING DITCH (Monument Type England)
POST MEDIEVAL FIELD BOUNDARY (Tag)
POST MEDIEVAL PLOUGH MARKS (Tag)
20TH CENTURY DRAIN (Tag)
UNCERTAIN RING DITCH (Tag)
UNCERTAIN DITCH (Tag)
DRAIN (Monument Type England)
MAGNETOMETRY SURVEY (Event)
GEOPHYSICAL SURVEY (Event)
FIELD BOUNDARY (Monument Type England)
POST MEDIEVAL (Historic England Periods)
UNCERTAIN (Historic England Periods)
20TH CENTURY (Historic England Periods)
Identifiers
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Identifiers:
OASIS Id: sumogeop1-503694
Report id: 04444
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OASIS (OASIS)
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Created Date
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Created Date:		 08 Jan 2024