Atlas of Hillforts of Britain and Ireland

IOM3220 Cronk Sumark, Ayrshire

Satellite Imagery

Satellite Imagery

HER:  Isle of Man 450 (None)

NMR:  None (None)

SM:  None

NGR:  SC392941

X:  239200  Y:  494100  (OSGB36)

Summary

Interesting and complex, commanding, partial contour hillfort located on prominent rocky outcrop above bend of the Sulby River with extensive views across island coastal plain to NE to Point of Ayre and NW to Jurby Head. Very steep surrounding slopes, precipitous on N and W ramparts only necessary on E and S. Defined by two summits to hilltop, to NE and SW, within outer ramparts. NE summit has bank, almost square in form 20m by 20m, with 3m wide entrance on NE. None defined elsewhere. Between this enclosure and the SW summit are three ditches and two banks, that to the W the strongest and partly enclosing the SW summit. This ditch is 3m wide and 1.5m deep, with no causeway. Here the inner bank shows evidence of vitrification. The outer ramparts have recently been part-re-interpreted by LiDar and field visit by the Centre for Manx Studies, University of Liverpool, since Cotton's description of the site in 1954. A substantial outer rampart on the S skirts the site downslope, its N portion now suggested as an historic Manx field bank; the S part, however, although heavily eroded, probably original and enclosing an outer enclosure on the S. Upslope from this, another rampart is set below a natural slope which may have been scarped to create a terrace area immediately behind and a suitable site for potential roundhouses. An additional rampart possible further upslope, running around the top of this scarp, but bare rock does not aid identification and caution necessary. Rough upland pasture, gorse scrub and bare rock. Difficult to interpret because of scrub, but heavily eroded. On 1st Ed. OS map (1869). Undated.

Status

Citizen Science:  

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -498005  Y:  7230441  (EPSG: 3857)

Longitude:  -4.473657253111441  Latitude:  54.317098946145  (EPSG:4326)

Country:  Isle of Man

Current County or Unitary Authority:  Ayre

Historic County:  Ayrshire

Current Parish/Community/Council/Townland:  Lezayre

Monument Condition

Difficult to interpret because of scrub, but heavily eroded.

Condition:
Extant  
Cropmark  
Likely Destroyed  

Land Use

Rough upland pasture, gorse scrub and bare rock.

Current Use:
Woodland  
Commercial Forestry Plantation  
Parkland  
Pasture (Grazing)  
Arable  
Scrub/Bracken  
Bare Outcrop  
Heather/Moorland  
Heath  
Built-up  
Coastal Grassland  
Other  

Landscape

Hillfort Type

Interesting and complex, commanding, partial contour hillfort located on two summits of prominent rocky outcrop above a bend of the the Sulby River to N and Wwith extensive views across island coastal plain to NE to Point of Ayre and NW to Jurby Head. Very steep surrounding slopes, precipitous on N and W.

Type:
Contour Fort  
Partial Contour Fort  
Promontory Fort  
Hillslope Fort  
Level Terrain Fort  
Marsh Fort  
Multiple Enclosure Fort  

Topographic Position

Position:
Hilltop  
Coastal Promontory  
Inland Promontory  
Valley Bottom  
Knoll/Hillock/Outcrop  
Ridge  
Cliff/Plateau-edge/Scarp  
Hillslope  
Lowland  
Spur  

Dominant Topographic Feature:  Two summits to hilltop

Aspect:
North  
Northeast  
East  
Southeast  
South  
Southwest  
West  
Northwest  
Level  

Altitude:  76.0m

Boundary

N/A


Dating Evidence

None.

Reliability:  D - None

Principal Activity:
Pre 1200BC  
1200BC - 800BC  
800BC - 400BC  
400BC - AD50  
AD50 - AD400  
AD400 - AD 800  
Post AD800  
Unknown  

Other Activity:
Pre Hillfort:   None
Post Hillfort:   None

Evidence:No related records

Investigation History

On 1st Ed. OS map (1869). Investigated by M.A. Cotton (with B.R.S. Megaw) 1954. Recent LiDar survey Centre for Manx Studies, University of Liverpool c. 2013.

Investigations:
1st Identified Map Depiction (1869):   OS map.
Other (1954):   Investigated by M.A. Cotton (with B.R.S. Megaw).
Other (1995):   Visited by Hillfort Study Group
Other (2015):   Visited by Hillfort Study Group
LiDAR Survey (None):   Centre for Manx Studies, University of Liverpool.

Interior Features

Upslope from outer rampart, another rampart is set below a natural slope which may have been scarped to create a terrace area immediately behind and a suitable for potential roundhouses.

Water Source

None

Source:
None  
Spring  
Stream  
Pool  
Flush  
Well  
Other  

Surface

Upslope from outer rampart, another rampart is set below a natural slope which may have been scarped to create a terrace area immediately behind and a suitable for potential roundhouses.

Interior Features (Surface):
No Known Features  
Round Stone Structures  
Rectangular Stone Structures  
Curvilinear Platforms  
Other Roundhouse Evidence  
Pits  
Quarry Hollows  
Other  

Excavation

None

Interior Features (Excavation):
No Known Excavation  
Pits  
Postholes  
Roundhouses  
Rectangular Structures  
Roads/Tracks  
Quarry Hollows  
Other  
Nothing Found  

Geophysics

None

Interior Features (Geophysics):
No Known Geophysics  
Pits  
Roundhouses  
Rectangular Structures  
Roads/Tracks  
Quarry Hollows  
Other  
Nothing Found  

Finds

None

Interior (Finds):
No Known Finds  
Pottery  
Metal  
Metalworking  
Human Bones  
Animal Bones  
Lithics  
Environmental  
Other  

Aerial

None

Interior Features (Aerial):
APs Not Checked  
None  
Roundhouses  
Rectangular Structures  
Pits  
Postholes  
Roads/Tracks  
Other  

Entrances

NE summit defended by bank, almost square in form 20m by 20m, with 3m wide gap entrance on NE. None defined elsewhere.

Total Number of Breaks Through Ramparts:  
1:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  

Chevaux de Frise:  

Entrances:
1. Simple Gap (North east):   Entrance to NE summit enclosure.

Enclosing Works

NE summit defended by bank, almost square in form 20m by 20m. Between this enclosure and the SW summit are three ditches and two banks, that to the W the strongest and partly enclosing the SW summit. This ditch is 3m wide and 1.5m deep, with no causeway. Here the inner bank shows evidence of vitrification. A substantial outer rampart on the S skirts the site downslope, its N portion now suggested as an historic Manx field bank; the S part, however, although heavily eroded, probably original and enclosing an outer enclosure on the S. Upslope from this, another rampart is set below a natural slope which may have been scarped to create a terrace area. An additional rampart possible further upslope still, running around the top of this scarp.

Enclosed Area:
Area 1:   Noneha.
Total:   Noneha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✗   Area not defined.

Ramparts Form a Continuous Circuit:
✓   Circuit complex and difficult to define.

Number of Ramparts:  
NE Quadrant:   4
SE Quadrant:   2
SW Quadrant:   2
NW Quadrant:   3
Total:   4

Morphology

Current Morphology:
Partial Univallate  
Univallate  
Partial Bivallate  
Bivallate  
Partial Multivallate  
Multivallate  
Unknown  

Detailed Morphology:
Partial Univallate  
Univallate  
Partial Bivallate  
Bivallate  
Partial Multivallate  
Multivallate  

Surface Evidence

Inner bank between two summits shows evidence of vitrification.

Enclosing Works (Surface):
None  
Earthen Bank  
Stone Wall  
Rubble  
Wall-walk  
Evidence of Timber  
Vitrification  
Other Burning  
Palisade  
Counter Scarp Bank  
Berm  
Unfinished  
Other  

Excavated Evidence

None

Enclosing Works (Excavation):
None  
Earthen Bank  
Stone Wall  
Murus Duplex  
Timber-framed  
Timber-laced  
Vitrification  
Other Burning  
Palisade  
Counter Scarp Bank  
Berm  
Unfinished  
No Known Excavation  
Other  

Other

Gang Working:
✗   None

Ditches:
✓   Three ditches between two summits.

Number of Ditches:  3

Annex:
✗   None

References

Cotton, M.A. 1954. Vitrified forts and the camp on Cronk Sumark, with supplementary notes by B.R.S. Megaw, Proc Isle of Man Nat Hist Antiq Soc, 5.2, 189-194.



Terms of Use

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