Satellite Imagery
Satellite Imagery
HER: The West of Scotland Archaeology Service 5586 (None)
NMR: NS 24 NW 21 (41009)
SM: 305
NGR: NS 2354 4729
X: 223540 Y: 647290 (OSGB36)
This fort occupies the summit of Knockjargon and is notable for the earlier burial cairn that occupies a significant proportion of its interior. Oval on plan, the fort measures 44m from NNE to SSW by 22m transversely (0.1ha) within twin stone ramparts spread about 3m in thickness and up to between 3m and 2m high externally. an additional line of defence comprising a shallow ditch with a low counterscarp bank can be seen to either side of the entrance on the S. The cairn within the interior, which is otherwise featureless, measures about 18m in diameter.
Citizen Science: ✓
Reliability of Data: Confirmed
Reliability of Interpretation: Confirmed
X: -535295 Y: 7496346 (EPSG: 3857)
Longitude: -4.808638698267793 Latitude: 55.686944282050916 (EPSG:4326)
Country: Scotland
Current County or Unitary Authority: North Ayrshire
Historic County: Ayrshire
Current Parish/Community/Council/Townland: Ardrossan
None
| Extant | ✓ |
| Cropmark | ✗ |
| Likely Destroyed | ✗ |
None
| Woodland | ✗ |
| Commercial Forestry Plantation | ✗ |
| Parkland | ✗ |
| Pasture (Grazing) | ✓ |
| Arable | ✗ |
| Scrub/Bracken | ✗ |
| Bare Outcrop | ✗ |
| Heather/Moorland | ✓ |
| Heath | ✗ |
| Built-up | ✗ |
| Coastal Grassland | ✗ |
| Other | ✗ |
None
| Contour Fort | ✓ |
| Partial Contour Fort | ✗ |
| Promontory Fort | ✗ |
| Hillslope Fort | ✗ |
| Level Terrain Fort | ✗ |
| Marsh Fort | ✗ |
| Multiple Enclosure Fort | ✗ |
| Hilltop | ✓ |
| Coastal Promontory | ✗ |
| Inland Promontory | ✗ |
| Valley Bottom | ✗ |
| Knoll/Hillock/Outcrop | ✗ |
| Ridge | ✗ |
| Cliff/Plateau-edge/Scarp | ✗ |
| Hillslope | ✗ |
| Lowland | ✗ |
| Spur | ✗ |
Dominant Topographic Feature: None
| North | ✗ |
| Northeast | ✗ |
| East | ✗ |
| Southeast | ✗ |
| South | ✗ |
| Southwest | ✗ |
| West | ✗ |
| Northwest | ✗ |
| Level | ✓ |
Altitude: 230.0m
N/A
In the absence of excavation, there are neither stratified artefacts nor radiocarbon dates to provide a chronology for the defences.
Reliability: D - None
| Pre 1200BC | ✗ |
| 1200BC - 800BC | ✗ |
| 800BC - 400BC | ✗ |
| 400BC - AD50 | ✗ |
| AD50 - AD400 | ✗ |
| AD400 - AD 800 | ✗ |
| Post AD800 | ✗ |
| Unknown | ✓ |
| Pre Hillfort: | Circular burial cairn in the interior |
| Post Hillfort: | None |
First depicted in 1856 on the 1st edition OS 25-inch map (Ayrshire 1858, sheet 11.5), the fort was described in the early 1890s by both David Christison (1893, 397) and John Smith, the latter with the aid of a sketch plan (1895, 23-4, fig 29). It was visited by RCAHMS in 1942 as part of the programme of wartime Emergency Surveys, and ten years later in 1952 during the Survey of Marginal Lands, and was Scheduled in 1955. It was visited by the OS in 1956 and the survey at 1:2500 was revised in 1965 and 1982. It was visited by the HFSG in 1983.
| 1st Identified Map Depiction (1856): | Annotated Fort on the 1st edition OS 25-inch map (Ayrshire 1858, sheet 11.5) |
| Other (1891): | Description by David Christison (1893, 397) |
| Earthwork Survey (1895): | John Smith (Smith 189523-4, fig 29) |
| Other (1942): | Description by Angus Graham and Gordon Childe for the RCAHMS wartime Emergency Surveys |
| Other (1955): | Scheduled |
| Other (1956): | Visited by the OS |
| Other (1965): | Revised at 1:2500 by the OS |
| Other (1982): | Revised at 1:2500 by the OS |
| Other (1983): | Visit by the Hillfort Study Group |
Featureless apart from the cairn
None
| None | ✓ |
| Spring | ✗ |
| Stream | ✗ |
| Pool | ✗ |
| Flush | ✗ |
| Well | ✗ |
| Other | ✗ |
Burial cairn
| No Known Features | ✗ |
| Round Stone Structures | ✗ |
| Rectangular Stone Structures | ✗ |
| Curvilinear Platforms | ✗ |
| Other Roundhouse Evidence | ✗ |
| Pits | ✗ |
| Quarry Hollows | ✗ |
| Other | ✓ |
None
| No Known Excavation | ✓ |
| Pits | ✗ |
| Postholes | ✗ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Roads/Tracks | ✗ |
| Quarry Hollows | ✗ |
| Other | ✗ |
| Nothing Found | ✗ |
None
| No Known Geophysics | ✓ |
| Pits | ✗ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Roads/Tracks | ✗ |
| Quarry Hollows | ✗ |
| Other | ✗ |
| Nothing Found | ✗ |
None
| No Known Finds | ✓ |
| Pottery | ✗ |
| Metal | ✗ |
| Metalworking | ✗ |
| Human Bones | ✗ |
| Animal Bones | ✗ |
| Lithics | ✗ |
| Environmental | ✗ |
| Other | ✗ |
NO APPARENT FEATURES
| APs Not Checked | ✗ |
| None | ✓ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Pits | ✗ |
| Postholes | ✗ |
| Roads/Tracks | ✗ |
| Other | ✗ |
See main summary
| 1: | None |
| 2: | None |
Guard Chambers: ✗
Chevaux de Frise: ✗
| 1. Simple Gap (South): | None |
Twin stone ramparts
| Area 1: | 0.1ha. |
| Total: | 0.1ha. |
Total Footprint Area: 0.35ha.
None
| ✗ | None |
| ✓ | None |
| NE Quadrant: | 2 |
| SE Quadrant: | 2 |
| SW Quadrant: | 2 |
| NW Quadrant: | 2 |
| Total: | 2 |
| Partial Univallate | ✗ |
| Univallate | ✗ |
| Partial Bivallate | ✗ |
| Bivallate | ✓ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
| Unknown | ✗ |
| Partial Univallate | ✗ |
| Univallate | ✗ |
| Partial Bivallate | ✗ |
| Bivallate | ✗ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
None
| None | ✗ |
| Earthen Bank | ✗ |
| Stone Wall | ✗ |
| Rubble | ✓ |
| Wall-walk | ✗ |
| Evidence of Timber | ✗ |
| Vitrification | ✗ |
| Other Burning | ✗ |
| Palisade | ✗ |
| Counter Scarp Bank | ✓ |
| Berm | ✗ |
| Unfinished | ✗ |
| Other | ✗ |
None
| None | ✗ |
| Earthen Bank | ✗ |
| Stone Wall | ✗ |
| Murus Duplex | ✗ |
| Timber-framed | ✗ |
| Timber-laced | ✗ |
| Vitrification | ✗ |
| Other Burning | ✗ |
| Palisade | ✗ |
| Counter Scarp Bank | ✗ |
| Berm | ✗ |
| Unfinished | ✗ |
| No Known Excavation | ✓ |
| Other | ✗ |
| ✗ | None |
| ✓ | Some visitors have suggested that there are ditches here but the most recent accounts dismiss them, though conceding that the scarp below each rampart may have been steepened. |
Number of Ditches: 1
| ✗ | None |
Christison, D (1893) 'The Prehistoric Forts of Ayrshire'. Proc Soc Antiq Scot 27 (1892-93), 381-405.
Feachem, R (1963) A guide to prehistoric Scotland. Batsford: London (p 110)
Smith, J (1895) Prehistoric Man in Ayrshire. London.
Atlas of Hillforts:
Wikidata:
This work is licensed under CC BY-SA 4.0
and should be cited as:
Lock, Gary and Ralston, Ian. 2024. Atlas of Hillforts of Britain and Ireland. Available at: https://hillforts.arch.ox.ac.uk
Document Version 1.1