Upland Herefordshire

Old Red Sandstone

The Old Red Sandstone is a large group of rocks of late Silurian and Devonian age. They were formed in a semi-arid desert environment which has given them their conspicuous red colouring through the intense weathering of iron-bearing minerals. Nevertheless, they are highly variable in outcrop with red, green, purple or brown colourings, coexisting in […]

Berrington Hall - brown sandstone from the Raglan Mudstone, most likely quarried on Shuttocks Hill

Raglan Mudstone

Most of the Raglan Mudstone Formation, which underlies the central plain of Herefordshire, consists of red, purple and green mudstones but beds of sandstone occur too and have been widely used for building stone. Sandstones tend to be micaceous and flaggy with multiple colours in a single bed. More unusually, on Bringsty Common a coarse […]

Blocky Bishops Frome Limestone, Black Bush Farm

Bishop’s Frome Limestone

January 1, 201312:00 pmMay 26, 2016 9:06 am

A calcrete, formed within the soil horizon during the Devonian, this rubbly limestone occurs at the boundary between the Raglan Mudstone and St Maughans Sandstone and is not widely used for building. Some use is made in Bishop’s Frome but generally it has been exploited for lime-burning. It also forms an important source for tufa […]

Tufa

January 1, 201312:00 pmMay 26, 2016 9:07 am

A porous variety of limestone similar to travertine, formed by flowing water containing large amounts of dissolved calcium carbonate precipitating over moss and other vegetation. It is easy to saw when wet but dries to a strong, light building stone which is used wherever it is found. Notable areas of formation and use are the […]

St Maughans Sandstone

January 1, 201312:00 pmMay 26, 2016 9:11 am

Lying stratigraphically above the Bishops Frome Limestone is the Early Devonian St Maughans Formation. This unit underlies the Bromyard Plateau of northeastern Herefordshire, the tops of the ‘cornstone’ hills to the north-west of Hereford, the area to the west of the Golden Valley (and extending up onto the flanks of the Black Mountains), and a […]

Cornstone slab in a drystone wall, Linton Lane, Bromyard. The pale grey and yellow pebbles are fragments of calcretes, ripped up and redeposited by flash floods.

Cornstone

January 1, 201312:00 pmMay 26, 2016 9:11 am

A local term for what is termed an intraformational conglomerate (a rock mostly made from pebbles which have been eroded from near the area they are deposited). These are distinctive rocks common within the Old Red Sandstone. They were formed by flash floods ripping up partially solidified mud banks in seasonal rivers and depositing them […]