Atlas of Hillforts of Britain and Ireland

WA1601 Gron Gaer, Glamorgan (Gron-Gaer; Grongaer)

Satellite Imagery

Satellite Imagery

HER:  Glamorgan Gwent 00241w (None)

NMR:  SS 59 SE 1 (305610)

SM:  GM197

NGR:  SS55049476

X:  255040  Y:  194760  (OSGB36)

Summary

Small partial contour fort located on spur above the Morlais River. Sharp fall into ravine on W, and to less extent on N by a re-entrant valley. Measures c. 34m by 40m, with interior area c. 0.1ha. Strangely no rampart on SW, where ground falls gently, but on E side, where ground rises very gently, a curving bank, slightly convex to E, is traceable for 37m. Bank is c. 10m wide at its base, nearly 2m high internally and 1m externally. Possible turn towards the W at its N end. No ditches. As circuit incomplete, but seems intact, possible the site was unfinished. Pasture with trees to N and W. On OS 1:25,000 map (1937-1961). Minimal investigations, undated.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -455962  Y:  6734015  (EPSG: 3857)

Longitude:  -4.095975627006309  Latitude:  51.632877341213614  (EPSG:4326)

Country:  Wales

Current County or Unitary Authority:  Swansea

Historic County:  Glamorgan

Current Parish/Community/Council/Townland:  Llanrhidian Higher

Monument Condition

Intact.

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

Pasture with trees to N and W.

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

Small partial contour fort located on spur above the Morlais River. Sharp fall into ravine on W, and to less extent on N by a re-entrant valley.

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:  Spur

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

Altitude:  61.0m

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 OS 1:25,000 map (1937-1961). RCAHMW investigation 1964. GGAT Prehistoric defended enclosures in Glamorgan survey 2005.

Investigations:
Other (1964):   RCAHMW investigation.
Other (2005):   GGAT Prehistoric defended enclosures in Glamorgan survey.
1st Identified Map Depiction (None):   None

Interior Features

None

Water Source

Stream 0.05km outside fort.

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

None

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

Entrances

No entrance defined.

Total Number of Breaks Through Ramparts:  
0:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:No related records

Enclosing Works

Strangely no ramparte on S, where ground falls gently, but on E side, where ground rises very gently, a curving bank, slightly convex to E, is traceable for 37m. Bank is c. 10m wide at its base, nearly 2m high internally and 1m externally. possible turn towards the W at its N end. No ditches. It is possible the the site was unfinished.

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:   0
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

The incomplete circuit suggests site possibly unfinished.

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:
✗   No ditch defined.

Number of Ditches:  0

Annex:
✗   None

References

Gerrard, C., Wiggins, H., and Evans, E. 2006. Prehistoric defended enclosures in Glamorgan with recommendations for fieldwork: Year 3 Report, GGAT Report No 2006/089, Project No GGAT78, Swansea: GGAT.

RCAHMW 1976. An inventory of the ancient monuments in Glamorgan, 1.2, Pre-Norman, Parts I-III, 624, Cardiff: HMSO.

Savory, H.N. 1949. List of hill-forts in Wales, Bull Board Celtic Stud, 13, 159.



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