Title: |
The Bristol Port Company Habitat Creation Scheme, Steart Peninsula, Somerset; Preliminary Geoarchaeological Assessment |
Series: |
Wessex Archaeology unpublished report series
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Downloads: |
wessexar1-148104_1.pdf (51 MB)
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Download
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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: |
Wessex Archaeology was commissioned by The Bristol Port Company to carry out a pilot study to test the effectiveness of magnetic gradiometer, Ground Penetrating Radar (GPR) and Electrical Resistivity Tomography (ERT) survey as different techniques to informing the archaeological assessment of the Site. The equipment used was a Bartington Grad601-2 dual sensor gradiometer system, a Campus Tigre ERT system with 64 electrodes with a spacing of 5m and a MALA Geoscience GPR system with a shielded antennae of 100-250MHz central frequency. The gradiometer survey identified large ferrous anomalies, thought to be the remains of structural targets on a firing range at the north of the Site. It also indicated that a previously recorded moated feature with earthworks is larger than thought, identifying it as a farmstead. The gradiometer data also identified several palaeochannels. Some had been identifed from lidar data, although some had not, indicating earlier phases of fluvial activity. The ERT data was successful in identifying the palaeochannels in the near surface, although will need refining when updates become available. The GPR data was impaired by high conductivity sediments, limiting depth of penetration of the GPR data to less than 1m. Despite this a paleochannel was identified which coincided with one seen in the ERT data and which had been previously identified from lidar data. It was determined that gradiometer survey over the Site would be the most effective method of identifying further features of archaeological interest in the form of both anthropogenic features and palaeochannels. |
Author: |
J I Russell
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Publisher: |
Wessex Archaeology
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Other Person/Org: |
Historic England (OASIS Reviewer)
Somerset HER (OASIS Reviewer)
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Year of Publication: |
2011
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Locations: |
Site: |
Steart Peninsula |
County: |
Somerset |
District: |
Somerset West and Taunton |
Parish: |
STOGURSEY |
Country: |
England |
Grid Reference: 324500, 144800 (Easting, Northing)
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Subjects / Periods: |
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Identifiers: |
OASIS Id: |
wessexar1-148104 |
OBIB: |
70944.02 |
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Note: |
Unpublished grey client report of 21 A4 and 12 A3 pages, including appendices and figures.
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Source: |
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Relations: |
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Created Date: |
13 Sep 2018 |