Atlas of Hillforts of Britain and Ireland

SC2170: Islay, Trudernish Point  

(Dun Thrudernish; Claggain Bay; Aros Bay)

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HER:  The West of Scotland Archaeology Service 2643

NMR:  NR 45 SE 10 (38050)

SM:  5659

NGR:  NR 4679 5264

X:  146790  Y:  652640  (EPSG:27700)

Boundary:  

Summary

This small fortification occupies the headland known as Trudernish point. The irregular interior on the top of the promontory measures no more than 30m from NE to SW by a maximum of 25m transversely (0.07ha), and is defended on the SW by no less than three walls, the inner of which is massively vitrified and forms a bank of rubble up to 5m thick by 3.2m high externally and 2m internally. The middle wall is up to 2m thick, with long runs of massive outer facing-stones, while the outer is comparatively slight, comprising little more than two runs of outer face incorporated into a later stone dyke. Nothing is visible of the entrance, though RCAHMS investigators suggested that a dip in the crest of the inner wall roughly midway along its length might mark its position.

Status

Citizen Science:  ✗  

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -671438  Y:  7499111  (EPSG: 3857)

Longitude:  -6.031626  Latitude:  55.700945  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Argyll & Bute

Historic County:   Argyll

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

Condition

Extant:  
Cropmark:  
Likely Destroyed:  

Land Use

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

Landscape

Hillfort Type

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

Topographic Position

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

Dominant Topographic Feature:  

Aspect

North:  
Northeast:  
East:  
Southeast:  
South:  
Southwest:  
West:  
Northwest:  
Level:  

Elevation

Altitude:  15.0m

Boundary

Boundary Type:  

Second HER:  

Second Current County or Unitary Authority:  

Second Historic County:  

Second Current Parish/Community/Council/Townland:  

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

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

Pre Hillfort Activity:  ✗  

Post Hillfort Activity:  ✓  Outer wall incorporated into a later field wall

None:  No details.

Investigations

First depicted in 1878 on the 1st edition OS 25-inch map (Argyll and Bute 1881, sheet 221.9), it was noted by Gordon Childe in 1934 (Childe 1935, 82). RCAHMS drew up a plan in 1976 during the preparation of the County Inventory for Argyll (RCAHMS 1984, 101, no.168) and the OS visited in 1979. RCAHMS took aerial photographs in 1979 and 2006. It was Scheduled in 1993. It formed part of a Coastal Zone Assessment carried out by EASE Archaeology in 2003.

1st Identified Map Depiction (1878):  Named in Gothic type on the 1st edition OS 25-inch map (Argyll and Bute 1881, sheet 221.9)
Other (1934):  Description by Gordon Childe
Earthwork Survey (1976):  Plan and description (RCAHMS 1984, 101, no.168; RCAHMS DC183-4)
Other (1979):  Surveyed at 1:10.000 by the OS
Other (1993):  Scheduled (Childe 1935, 82)
Other (2003):  Visited by EASE Archaeology for a Coastal Zone Assessment
Other (2007):  Visited by the Hill-Fort Study Group

Interior Features

Featureless

Water Source

None:  
Spring:  
Stream:  
Pool:  
Flush:  
Well:  
Other:  

Surface

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

Excavation

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

Geophysics

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

Finds

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

Aerial

NO APPARENT FEATURES

APs Not Checked:  
None:  
Roundhouses:  
Rectangular Structures:  
Pits:  
Postholes:  
Roads/Tracks:  
Other:  

Entrances

See main summary

Total Number of Breaks Through Ramparts:  

Number of Possible Original Entrances:  0:  No clearly visible entrance

Guard Chambers:  

Chevaux de Frise:  ✗  

Enclosing Works

Three walls cutting across the neck of a promontory

Enclosed Area 1:  0.07ha.
Enclosed Area 2:  
Enclosed Area 3:  
Enclosed Area 4:  
Total Enclosed Area:  0.1ha.

Total Footprint Area:  0.15ha.

Multi-period Enclosure System:  ✗  

Ramparts Form a Continuous Circuit:  ✗  

Number of Ramparts:  3

Number of Ramparts NE Quadrant:  
Number of Ramparts SE Quadrant:  
Number of Ramparts SW Quadrant:  3
Number of Ramparts NW Quadrant:  

Current Morphology

Partial Univallate:  
Univallate:  
Partial Bivallate:  
Bivallate:
Partial Multivallate:  
Multivallate:  
Unknown:  

Multi-period Morphology

Partial Univallate:  
Univallate:  
Partial Bivallate:  
Bivallate:  
Partial Multivallate:  
Multivallate:  

Surface Evidence

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

Excavated Evidence

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

Gang Working

Gang Working:  ✗ 

Ditches

Ditches:  

Number of Ditches:  

Annex

Annex:  ✗  

References

Childe, V G (1935) 'Notes on some duns in Islay'. Proc Soc Antiq Scot 69 (1934-5), 81-4

Moore, H. & Wilson, G. (2003) EASE Archaeology, 'Report on a Coastal Zone Assessment Survey of Islay'

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

Shanks, I D (1972) 'Trudernish Point', Discovery Excav Scot 1972, 5

Terms of Use

The online version of the Atlas of Hillforts of Britain and Ireland should be cited as:

Lock, G. and Ralston, I. 2017.  Atlas of Hillforts of Britain and Ireland. [ONLINE] Available at: https://hillforts.arch.ox.ac.uk.

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