GEOPHYSICAL SURVEY Diaper Farm, Stowupland, Suffolk Site Code: SKT131 JAC27131 May 2021 rpsgroup.com Diaper Farm, Stowupland, Suffolk MSTM954 - Geophysical Survey Report Magnitude Surveys was commissioned to assess the subsurface archaeological potential of a c. Abstract8.786ha area of land at Diaper Farm, Stowupland, Suffolk. A fluxgate gradiometer survey was successfully completed across the survey area. Though no anomalies suggestive of probable archaeological activity have been identified, anomalies of undetermined origin have been detected throughout the survey area. These anomalies could relate to agricultural, natural, or modern processes, although an archaeological origin cannot be ruled out. A former trackway that has been recorded on the historical OS mapping has also been identified . Agricultural activity has been detected within the survey area, comprising of two former field boundaries, field drainage and ploughing trends. Several areas of ferrous debris have been identified in close proximity to modern farm buildings. Magnetic disturbance within the survey area is limited to buried services and extant field boundaries. 2 | P a g e Diaper Farm, Stowupland, Suffolk MSTM954 - Geophysical Survey Report Abstract ................................................................................................................................................... 2 ListContents of Figures .......................................................................................................................................... 4 1. Introduction .................................................................................................................................... 5 2. Quality Assurance ........................................................................................................................... 5 3. Objectives........................................................................................................................................ 5 4. Geographic Background .................................................................................................................. 6 5. Archaeological Background ............................................................................................................. 6 6. Methodology ................................................................................................................................... 7 Data Collection ...................................................................................................................... 7 Data Processing ..................................................................................................................... 8 Data Visualisation and Interpretation ................................................................................... 8 7. Results ............................................................................................................................................. 9 Qualification .......................................................................................................................... 9 Discussion .............................................................................................................................. 9 Interpretation ........................................................................................................................ 9 General Statements .......................................................................................................... 9 Magnetic Results - Specific Anomalies ............................................................................ 10 8. Conclusions ................................................................................................................................... 11 9. Archiving ....................................................................................................................................... 12 10. Copyright ....................................................................................................................................... 12 11. References .................................................................................................................................... 12 12. Project Metadata .......................................................................................................................... 13 13. Document History ......................................................................................................................... 13 3 | P a g e Diaper Farm, Stowupland, Suffolk MSTM954 - Geophysical Survey Report Figure 1: Site Location 1:25,000 @ A4 ListFigure of 2: FiguresLocation of Survey Areas 1:5,000 @ A3 Figure 3: Magnetic Total Field (Lower Sensor) 1:1,500 @ A3 Figure 4: Magnetic Gradient 1:1,500@ A3 Figure 5: Magnetic Interpretation 1:1,500 @ A3 Figure 6: Magnetic Interpretation over Historical Mapping and Satellite 1:3,000 @ A3 Imagery Figure 7: XY Trace Plot 1:1,500 @ A3 . 4 | P a g e Diaper Farm, Stowupland, Suffolk MSTM954 - Geophysical Survey Report 1.1. Magnitude Surveys Ltd (MS) was commissioned by RPS on behalf of CLIENT’S CLIENT to 1. Introductionundertake a geophysical survey over a c. 8.786ha area of land at Diaper Farm, Stowupland, Suffolk (TM 5523 9442). 1.2. The geophysical survey comprised quad-towed, cart-mounted GNSS-positioned fluxgate gradiometer survey. Magnetic survey is the standard primary geophysical method for archaeological applications in the UK due to its ability to detect a range of different features. The technique is particularly suited for detecting fired or magnetically enhanced features, such as ditches, pits, kilns, sunken featured buildings (SFBs) and industrial activity (David et al., 2008). 1.3. The survey was conducted in line with the current best practice guidelines produced by Historic England (David et al., 2008), the Chartered Institute for Archaeologists (CIfA, 2020) and the European Archaeological Council (Schmidt et al., 2015). 1.4. It was conducted in line with a WSI produced by MS (Dyulgerski, K., 2021). 1.5. The survey commenced on 13/05/21 and took 1 day to complete. 2.1. Magnitude Surveys is a Registered Organisation of the Chartered Institute for Archaeologists 2. Quality(CIfA), the Assurance chartered UK body for archaeologists, and a corporate member of ISAP (International Society for Archaeological Prospection). 2.2. The directors of MS are involved in cutting edge research and the development of guidance/policy. Specifically, Dr Chrys Harris has a PhD in archaeological geophysics from the University of Bradford, is a Member of CIfA and is the Vice-Chair of the International Society for Archaeological Prospection (ISAP); Finnegan Pope-Carter has an MSc in archaeological geophysics and is a Fellow of the London Geological Society, as well as a member of GeoSIG (CIfA Geophysics Special Interest Group); Dr Kayt Armstrong has a PhD in archaeological geophysics from Bournemouth University, is a Member of CIfA, the Editor of ISAP News, and is the UK Management Committee representative for the COST Action SAGA; Dr Paul Johnson has a PhD in archaeology from the University of Southampton, is a Fellow of the Society of Antiquaries of London, has been a member of the ISAP Management Committee since 2015, and is currently the nominated representative for the EAA Archaeological Prospection Community to the board of the European Archaeological Association. 2.3. All MS managers, field and office staff have degree qualifications relevant to archaeology or geophysics and/or field experience. 3.1. The objective of this geophysical survey was to assess the subsurface archaeological potential 3. Objectivesof the survey area. Magnitude Surveys Ltd 5 | Page Diaper Farm, Stowupland, Suffolk MSTM954 - Geophysical Survey Report 4.1. The survey area was located c. 1km south-west of Stowupland. (Figure 1). Gradiometer survey 4. Geographicwas undertaken Background across two fields under pasture. The survey area was bounded by the A14 to the north, the B1113 to the south-east, agricultural buildings to the southwest and further fields to the west (Figure 2). 4.2. Survey considerations: Survey Ground Conditions Further Notes Area 1 The survey area consisted of a The survey area was bounded to the north and pasture field that sloped gently south by wooden fencing and a treeline, a down to the south-west. hedgerow to the west and farm buildings to the south-west. 2 The survey area consisted of a The survey area was bounded to the north-west pasture field that sloped gently and south-west by wooden fencing and a down to the south-west. treeline, by earthen mounds to the south-east and a hedgerow to the east. 4.3. The underlying geology comprises Quaternary and Neogene sands from the Crag Group. Superficial deposits from the Lowestoft Formation cover the entire survey area; diamicton covers the eastern and central half of the survey area and sands and gravels cover the western half. (British Geological Survey, 2021). 4.4. The soils consist of slowly permeable, seasonally wet, slightly acid but base-rich loamy and clayey soils in the eastern half of the survey area and lime-rich loamy and clayey soils with impeded drainage in the west. (Soilscapes, 2021). 5.1. The following is a summary of a Desk Based Assessment produced and provided by RPS (Archer, 5. Archaeological2021). Background 5.2. Mesolithic activity has been identified c. 800m to the west of the survey area as a findspot of a flint core and a blade. 5.3. The general area surrounding the survey