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Carleith Farm, Gradiometer Survey
Date 18 November 2021
Event ID 1155564
Category Recording
Type Magnetometry
Permalink http://canmore.org.uk/event/1155564
Historic Environment Scotland, Archaeological Survey Team, undertook gradiometer survey of 0.98ha at Carleith Farm, West Dunbartonshire, on 18 November 2021 using a hand-propelled Sensys MXPDA system mounted on a Sensys F-type non-magnetic cart. The survey, which forms part of a wider Antonine Wall Geophysical Survey project, was directed towards investigating a stretch of the Antonine Wall suggested as the location of a fortlet, based on the regular spacing of fortlets along the frontier. It was undertaken to (a) confirm the line of the Antonine Wall in the area, (b) investigate the line of the Military Way, (c) locate the suspected fortlet, (d) investigate the nine foot wide wall identified through earlier excavation, and (e) investigate the find spot of a distance slab found within the survey area.
The survey results are summarised below, drawing out the main points from a comprehensive report outlining methodology and detailed results [1]. The archive also includes the unprocessed survey data, processed survey data [2], survey area extents which contain the survey metadata, and point, line, and polygon interpretations [3].
The survey has confirmed the line of the Antonine Wall’s linear elements, supporting the results of earlier excavation. It has also positively identified the location of the fortlet, which was long been suspected in this area, immediately west of excavations undertaken in the 1980s. The fortlet measures about 20m from NNW to SSE within ramparts about 3m thick. Its N to S dimensions could not be confirmed. No defensive ditches associated with the fortlet were identified in the survey data.
Visited by HES Archaeological Survey (N. Hannon, H. Blake), 18 November 2021.
[1] http://canmore.org.uk/collection/2479284
[2] http://canmore.org.uk/collection/2239966
[3] http://canmore.org.uk/collection/2239961
[4] http://canmore.org.uk/site/43309
