Resistivity

Date 17 March 2018

Event ID 1087640

Category Recording

Type Resistivity

Permalink http://canmore.org.uk/event/1087640

NS 74812 47011 Resistance and ground penetrating radar

(GPR) surveys were carried out, 17 March 2018, to the SW

of the ruins of St Ninian’s Church, Stonehouse. The aim

of the survey was to confirm the existence and location

of a postulated tunnel believed to run from the graveyard

associated with St Ninian’s.

The area available for survey was limited due to livestock

pens and other material and as a result only a 20 x 40m

area was investigated. However, the postulated tunnel, if it

existed, should have crossed the survey area.

Resistance survey at 0.5m intervals using a standard 0.5m

probe separation, which maps to a depth of c0.75m, was

undertaken. GPR survey using a 500MHz and a 250Mhz

antanea was also undertaken. A 500MHz antenna should

retrieve data to a depth of c2m while a 250MHz antenna

should retrieve data to c4m.

Both surveys detected broad variations which are thought

to be due natural variations within the underlying sands.

No anomalies consistent with a tunnel type feature were

detected.

The survey was part of a community event with members

the Stonehouse Heritage Group (as part of CAVLP) assisting

with the data collection. The survey was commissioned and

organised by Archaeology Scotland as part of the Adopt a

Monument scheme.

Archive: Rose Geophysical Consultants

Funder: Archaeology Scotland on behalf of the Stonehouse

Heritage Group

Susan Ovenden – Rose Geophysical Consultants

(Source: DES, Volume 19)