Atlas of Hillforts of Britain and Ireland

SC2776 a' Chlach Thuill, Sutherland (The Split Rock, Clachtoll)

Satellite Imagery

Satellite Imagery

HER:  Highland HER MHG34508 (None)

NMR:  NC 02 NW 25 (140944)

SM:  None

NGR:  NC 0381 2671

X:  203813  Y:  926716  (OSGB36)

Summary

A small fragment of vitrified walling has been noted on the landward side of the stack known as the Split Rock of Clachtoll, which forms part of the headland on the S side of the mouth of the Bay of Clachtoll. The stack falls sheer to the sea some 20m below on three sides, but the summit is more accessible on the E, where the bedding plane of the bedrock slopes up from a lower rockface. Traces of any defences are scant, but at the N corner of the summit area a short fragment of wall standing up to 1m high can be seen, and there are also several loose stones on the SSE. The irregular and uneven summit of the stack measures about 14m from ENE to WSW by 7m transversely (77 sq m), though to what extent this was ever enclosed by the wall is not known.

Status

Citizen Science:  

Reliability of Data:  Unconfirmed

Reliability of Interpretation:  Confirmed

Location

X:  -594314  Y:  8006410  (EPSG: 3857)

Longitude:  -5.338814434604932  Latitude:  58.18561208115096  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Highland

Historic County:  Sutherland

Current Parish/Community/Council/Townland:  Assynt

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:  20.0m

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:   None

Evidence:No related records

Investigation History

A photograph of the vitrifaction is held by Highland HER

Investigations:
1st Identified Written Reference (1998):   Noted by Malcolm Bangor-Jones (1998)
Earthwork Survey (2009):   Plan and description Gordon Sleight through RCAHMS SRP project.

Interior Features

Featureless

Water Source

None

Source:
None  
Spring  
Stream  
Pool  
Flush  
Well  
Other  

Surface

None

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

NO APPARENT FEATURES

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:  
0:   None

Number of Possible Original Entrances:  
2:   Presumably on the E but nothing remains

Guard Chambers:  

Chevaux de Frise:  

Entrances:No related records

Enclosing Works

Single wall across the landward side

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

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✗   Surviving summit area only 77 square metres

Ramparts Form a Continuous Circuit:
✗   None

Number of Ramparts:  
NE Quadrant:   1
SE Quadrant:   0
SW Quadrant:   0
NW Quadrant:   0
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

Bangor-Jones, M (1998) 'Assynt (Assynt parish), survey'. Disc Exc Scot (1998), 48



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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