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Bucks Geology Group

Dinton Castle

Grid reference: SP 766 115.

Ordnance Survey map: Aylesbury and Leighton Buzzard Sheet 165.

Geological maps: 1:50,000 series Aylesbury sheet 238.

Bucks County Council administration area: Aylesbury Vale.

Owned by: This is a grade 2 listed building under the care of English Heritage.

Area of site: ha.

Access, location and parking: Dinton Castle is located near Stone in west Bucks, close to the turning for Dinton on the A418. Parking for 2 or 3 cars only on the verge.

Interest Summary: Dinton Castle is a local folly built from Portland Limestone with large ammonites as decoration. Archaeologically interesting for its (excavated) Saxon burial ground.

The folly (an imitation of a castle structure) was built in 1769 and was designed to be seen from Dinton Hall. It is an octagonal plan with circular towers east and west. It was two storeys, with the towers reaching to 3 storeys.

The building stones of the folly walls are composed of the locally sourced Portland Formation. They are mainly the Creamy Limestone of the Portland Stone Member.There are also minor sandstone blocks in the structure.

Dinton Caslte folly

There are several Portlandian ammonites used decoratively within the structure. These are the large species Titanites giganteus, which used to occur fairly commonly in the old quarries of this area.

Portlandian ammonites Titanites giganteus used decoratively

Large ammonites set into the structure of Dinton Castle

BGG Contact : Mike Palmer (

page last updated: 1st October 2016

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