Cockcroft, T. and Gater, J. A. (2021). Geophysical Survey at Camelford, Cornwall. Sumo Geophysics. https://doi.org/10.5284/1110278. Cite this using datacite

Title
Title
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Title:		 Geophysical Survey at Camelford, Cornwall
Series
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Series:		 SUMO Geophysics Limited unpublished reports
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Downloads:
sumogeop1-503088_183324.pdf (17 MB) : Download
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Licence Type:
Creative Commons Attribution 4.0 International Licence icon
Creative Commons Attribution 4.0
International Licence
DOI
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DOI
https://doi.org/10.5284/1110278
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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. Hand Held: Data will be collected using a Bartington Grad 601-2. The instrument consists of two paired sensors (see below) and readings are logged at 0.25m centres along traverses 1.0m apart across 30m grids. The collection of data at 0.25m centres provides an appropriate methodology balancing cost and time with resolution as per Historic England guidelines. Two 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. A magnetometer survey of approximately 170ha of ground was carried out over a study area associated with the proposed construction of a bypass around Camelford, Cornwall. The work was carried out over the course of several phases of fieldwork during Autumn in 2021. A number of features of archaeological interest have been identified including a large, probable circular ditch possibly associated with a number of surrounding ring ditches; three possible rounds or similar enclosures; a few small complexes of probable ring ditches and numerous field system and ditches. Former field boundaries, evidence of ploughing, land drains, natural deposits and an igneous dyke have also been mapped. The results can be used to assess the potential impact of the proposed road scheme.
Author
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Author:		 Thomas Cockcroft
John A Gater
Publisher
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Publisher:		 Sumo Geophysics
Year of Publication
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Year of Publication:		 2021
Locations
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Locations:
Parish: Camelford
District: Cornwall
County: Cornwall
Country: England
Grid Reference: 210428, 83724 (Easting, Northing)
Subjects / Periods
Subjects / Periods
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Subjects / Periods:
UNCERTAIN DITCHED ENCLOSURE (Tag)
PIT (Monument Type England)
PLOUGH MARKS (Monument Type England)
RING DITCH (Monument Type England)
DITCHED ENCLOSURE (Monument Type England)
POST MEDIEVAL FIELD BOUNDARY (Tag)
GEOPHYSICAL SURVEY (Event)
FIELD BOUNDARY (Monument Type England)
RIDGE AND FURROW (Monument Type England)
UNCERTAIN PIT (Tag)
20TH CENTURY DRAIN (Tag)
UNCERTAIN RING DITCH (Tag)
DRAIN (Monument Type England)
MAGNETOMETRY SURVEY (Event)
POST MEDIEVAL RIDGE AND FURROW (Tag)
20TH CENTURY PLOUGH MARKS (Tag)
20TH CENTURY (Historic England Periods)
POST MEDIEVAL (Historic England Periods)
UNCERTAIN (Historic England Periods)
Identifiers
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Identifiers:
OASIS Id: sumogeop1-503088
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OASIS (OASIS)
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Created Date
Created Date
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Created Date:		 12 Jul 2023