SC2630: Grinan Hill | (Grinnan Hill) |
Sources: Esri, DigitalGlobe, Earthstar Geographics, CNES/Airbus DS, GeoEye, USDA FSA, USGS, Getmapping, Aerogrid, IGN, IGP, and the GIS User Community
HER: Perth and Kinross Heritage Trust MPK698
NMR: NN 80 NW 6 (25262)
SM: 3088
NGR: NN 8338 0936
X: 283380 Y: 709360 (EPSG:27700)
Boundary: ✗
This fort is situated on a wooded promontory formed by the escarpment overlooking the Keir Burn on the SW side of Braco. The defences comprise three ramparts with external ditches drawn in an arc across the N and E approaches to form an oval enclosure, though the inner has been reduced to little more than a scarp, and all three have been obliterated in the central sector of the arc. The only recorded measurements of the interior are supplied by David Christison, who estimated it at about 60m by 50m (0.24ha). Likewise, Christison provides the only observation of an entrance, placing it on the E along the S margin of the promontory, though both his (1900, 54-5, fig 15) and General Roy's earlier plan (1793, pl xxxi) also appear to show a trackway descending obliquely down the escarpment on this flank of the promontory. The interior is featureless.
| Citizen Science: | ✗ |
| Reliability of Data: | Confirmed |
| Reliability of Interpretation: | Confirmed: | Falls below the 0.2ha threshold |
X: -432403 Y: 7610834 (EPSG: 3857)
Longitude: -3.884343 Latitude: 56.26242 (EPSG:4326)
Country: Scotland
Current County or Unitary Authority: Perth & Kinross
Historic County: Perthshire
Current Parish/Community/Council/Townland: Ardoch
| Extant: | ✓ |
| Cropmark: | ✗ |
| Likely Destroyed: | ✗ |
| Woodland: | ✓ |
| Commercial Forestry Plantation: | ✗ |
| Parkland: | ✗ |
| Pasture (Grazing): | ✗ |
| Arable: | ✗ |
| Scrub/Bracken: | ✗ |
| Bare Outcrop: | ✗ |
| Heather/Moorland: | ✗ |
| Heath: | ✗ |
| Built-up: | ✗ |
| Coastal Grassland: | ✗ |
| Other: | ✗ |
| Contour Fort: | ✗ |
| Partial Contour Fort: | ✗ |
| Promontory Fort: | ✓ |
| Hillslope Fort: | ✗ |
| Level Terrain Fort: | ✗ |
| Marsh Fort: | ✗ |
| Multiple Enclosure Fort: | ✗ |
| Hilltop: | ✗ |
| Coastal Promontory: | ✗ |
| Inland Promontory: | ✓ |
| Valley Bottom: | ✗ |
| Knoll/Hillock/Outcrop: | ✗ |
| Ridge: | ✗ |
| Cliff/Plateau-edge/Scarp: | ✗ |
| Hillslope: | ✗ |
| Lowland: | ✗ |
| Spur: | ✗ |
Dominant Topographic Feature: ✗
| North: | ✗ |
| Northeast: | ✗ |
| East: | ✗ |
| Southeast: | ✗ |
| South: | ✗ |
| Southwest: | ✗ |
| West: | ✗ |
| Northwest: | ✗ |
| Level: | ✓ |
Altitude: 120.0m
| Boundary Type: | ✗ |
Second HER: ✗
Second Current County or Unitary Authority: ✗
Second Historic County: ✗
Second Current Parish/Community/Council/Townland: ✗
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: | ✗ |
| 1st Identified Map Depiction (1755): | Shown on William Roy's Military Survey (1747-55) |
| Earthwork Survey (1793): | Plan by General William Roy (1793, pl xxxi) |
| Other (1863): | Annotated Fort in Roman Type on the 1st edition OS 25-inch map (Perth and Clackmannan 1866, sheet 117.10) |
| Earthwork Survey (1899): | Sketch-plan and description by David Christison (1900, 54-5, fig 15) |
| Other (1943): | Noted by OGS Crawford prior to 1943 and probably 1937 (1949, 39) |
| Other (1957): | Description for the RCAHMS Survey of Marginal Lands |
| Other (1967): | Resurveyed at 1:2500 by the OS |
| Other (1972): | Scheduled |
Featureless
| None: | ✓ |
| Spring: | ✗ |
| Stream: | ✗ |
| Pool: | ✗ |
| Flush: | ✗ |
| Well: | ✗ |
| Other: | ✗ |
| No Known Features: | ✓ |
| Round Stone Structures: | ✗ |
| Rectangular Stone Structures: | ✗ |
| Curvilinear Platforms: | ✗ |
| Other Roundhouse Evidence: | ✗ |
| Pits: | ✗ |
| Quarry Hollows: | ✗ |
| Other: | ✗ |
| No Known Excavation: | ✓ |
| Pits: | ✗ |
| Postholes: | ✗ |
| Roundhouses: | ✗ |
| Rectangular Structures: | ✗ |
| Roads/Tracks: | ✗ |
| Quarry Hollows: | ✗ |
| Other: | ✗ |
| Nothing Found: | ✗ |
| No Known Geophysics: | ✓ |
| Pits: | ✗ |
| Roundhouses: | ✗ |
| Rectangular Structures: | ✗ |
| Roads/Tracks: | ✗ |
| Quarry Hollows: | ✗ |
| Other: | ✗ |
| Nothing Found: | ✗ |
| No Known Finds: | ✓ |
| Pottery: | ✗ |
| Metal: | ✗ |
| Metalworking: | ✗ |
| Human Bones: | ✗ |
| Animal Bones: | ✗ |
| Lithics: | ✗ |
| Environmental: | ✗ |
| Other: | ✗ |
Obscured by trees
| APs Not Checked: | ✗ |
| None: | ✓ |
| Roundhouses: | ✗ |
| Rectangular Structures: | ✗ |
| Pits: | ✗ |
| Postholes: | ✗ |
| Roads/Tracks: | ✗ |
| Other: | ✗ |
See main summary
| Total Number of Breaks Through Ramparts: | 0 |
| Number of Possible Original Entrances: | 0: | Probably on the E |
Guard Chambers: ✗
| Chevaux de Frise: | ✗ |
Three ramparts and ditches cutting off a promontory
| Enclosed Area 1: | 0.24ha. |
| Enclosed Area 2: | ✗ |
| Enclosed Area 3: | ✗ |
| Enclosed Area 4: | ✗ |
| Total Enclosed Area: | 0.2ha. |
Total Footprint Area: ✗
| Multi-period Enclosure System: | ✗ |
| Ramparts Form a Continuous Circuit: | ✗ |
| Number of Ramparts: | 3 |
| Number of Ramparts NE Quadrant: | 3 |
| Number of Ramparts SE Quadrant: | ✗ |
| Number of Ramparts SW Quadrant: | ✗ |
| Number of Ramparts NW Quadrant: | ✗ |
| Partial Univallate: | ✗ |
| Univallate: | ✗ |
| Partial Bivallate: | ✗ |
| Bivallate: | ✗ |
| Partial Multivallate: | ✓ |
| Multivallate: | ✗ |
| Unknown: | ✗ |
| Partial Univallate: | ✗ |
| Univallate: | ✗ |
| Partial Bivallate: | ✗ |
| Bivallate: | ✗ |
| Partial Multivallate: | ✗ |
| Multivallate: | ✗ |
| None: | ✗ |
| Earthen Bank: | ✓ |
| Stone Wall: | ✗ |
| Rubble: | ✗ |
| Wall-walk: | ✗ |
| Evidence of Timber: | ✗ |
| Vitrification: | ✗ |
| Other Burning: | ✗ |
| Palisade: | ✗ |
| Counter Scarp Bank: | ✗ |
| Berm: | ✗ |
| Unfinished: | ✗ |
| Other: | ✗ |
| 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: | ✗ |
Ditches: ✓
| Number of Ditches: | 3 |
| Annex: | ✗ |
Christison, D (1900) 'The forts, "camps", and other field-works of Perth, Forfar and Kincardine'. Proc Soc Antiq Scot 34 (1899-1900), 43-120
Crawford, O G S (1949) Topography of Roman Scotland north of the Antonine Wall. Cambridge
Roy, W (1793) The Military Antiquities of the Romans in Britain. London
Atlas of Hillforts: https://hillforts.arch.ox.ac.uk/?query=Atlas_of_Hillforts_4166_0%2CMain_Atlas_Number%2C2630
Wikidata: http://www.wikidata.org/entity/Q31097155
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.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.