Atlas of Hillforts of Britain and Ireland

SC2175 Islay, Loch Nan Clach, Argyll

Satellite Imagery

Satellite Imagery

HER:  The West of Scotland Archaeology Service 2687 (None)

NMR:  NR 45 SW 5 (38094)

SM:  None

NGR:  NR 4312 5107

X:  143120  Y:  651070  (OSGB36)

Summary

This fort encloses the summit of a narrow rocky ridge rising out of open moorland. Defended by a single wall up to 2.8m thick, the interior measures about 76m from NE to SW by a maximum of 16m transversely (0.1ha), not only taking in the rocky spine of the ridge but also a lower terrace on its NW flank. The wall itself is best preserved approaching the entrance at the SW end, where the outer face still stands up to 1.6m in height, though elsewhere it has been reduced to an intermittent band of rubble with several runs of outer face. The masonry on the SE side of the entrance has largely collapsed, but the passageway measures about 1.3m wide, and at the inner end of its NW side, which is founded to take advantage of a boss of outcrop, the face is 1.5m high; four probable lintels up to 2.1m in length lie in the rubble, suggesting that the passageway was at least partly roofed. The only structure visible within the interior is a late animal pen built immediately in the rear of the wall on the W.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -677758  Y:  7495951  (EPSG: 3857)

Longitude:  -6.088400328372258  Latitude:  55.684945385803  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Argyll & Bute

Historic County:  Argyll

Current Parish/Community/Council/Townland:  Kildalton And Oa

Monument Condition

None

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

None

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

None

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:  None

Aspect:
North   ✗
Northeast   ✗
East   ✗
Southeast   ✗
South   ✗
Southwest   ✗
West   ✗
Northwest   ✗
Level   ✓

Altitude:  130.0m

Boundary

N/A


Dating Evidence

In the absence of excavation, there are neither stratified artefacts nor radiocarbon dates to provide a chronology for the defences.

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:   Later animal pen built into the rear of the wall on the W

Evidence:No related records

Investigation History

First reported by Frank Newall in 1964 (Newall 1964), it was surveyed in 1977 by RCAHMS during the preparation of the County Inventory for Argyll (RCAHMS 1984, 98, no.162), and visited by the OS in 1979. It was photographed from the air by RCAHMS in 1979 and 2006.

Investigations:
1st Identified Written Reference (1964):   Discovery and description by Frank Newall (Newall 1964)
Earthwork Survey (1977):   Plan and description (RCAHMS 1984, 98, no.162; RCAHMS DC173-4)
1st Identified Map Depiction (1979):   Surveyed at 1:10.000 by the OS

Interior Features

Featureless except for a later animal pen

Water Source

None

Source:
None   ✓
Spring   ✗
Stream   ✗
Pool   ✗
Flush   ✗
Well   ✗
Other   ✗

Surface

Later stone walled animal pen

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

Later stone-walled animal pen

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

Entrances

See main summary

Total Number of Breaks Through Ramparts:  
1:   Numerous gaps in the line of the wall

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Passage-way/Corridor (South west):   None

Enclosing Works

Single wall, probably originally continuous

Enclosed Area:
Area 1:   0.1ha.
Total:   0.1ha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✗   None

Ramparts Form a Continuous Circuit:
✓   None

Number of Ramparts:  
NE Quadrant:   1
SE Quadrant:   1
SW Quadrant:   1
NW Quadrant:   1
Total:   1

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

None

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:
✗   None

Number of Ditches:  None

Annex:
✗   None

References

Newall, F (1964) 'Hill forts', Discovery Excav Scot 1964, 12

RCAHMS (1984) The Royal Commission on the Ancient and Historical Monuments of Scotland. Argyll: an inventory of the monuments volume 5: Islay, Jura, Colonsay and Oronsay. HMSO: Edinburgh



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


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