Limestone

Crinoids in Wenlock Limestone ("Ledbury Marble") cobble, Ledbury

Wenlock Limestone

April 1, 201312:00 pmMay 26, 2016 9:30 am

Pale grey nodular or thinly bedded limestones. In character it varies markedly across the region. Examples from the Malvern Axis hills (Abberley, Suckley etc.), Ledbury and Woolhope Dome can be spectacularly fossiliferous, corresponding to reef bodies. During the Silurian water depth deepened towards open ocean to the west and around Ludlow the Wenlock limestone is […]

Aymestry Limestone, Gatley Park Folly, Leinthall Earls

Aymestry Limestone

January 1, 201312:00 pmMay 26, 2016 9:08 am

Blue-grey, hard, nodular argillaceous limestone. The presence of the strongly ribbed brachiopod Kirkidium knightii is diagnostic for this formation. Widely used in the Mortimer Forest, Woolhope Dome, Suckley Hills and Ledbury areas. The character of the formation, like most of the Silurian strata, can vary markedly between a massive limestone suitable for dimension stone to […]

Close-up of Ludlow Shales in Bank House, Leintwardine (copyright Scenesetters)

Ludlow Shales

January 1, 201312:00 pmMay 26, 2016 9:08 am

Olive-blue-grey calcareous siltstones, silty mudstones and mudstones. From a building-stone perspective a classification for the Silurian strata based on rock type is most appropriate, not least because the best building stone yielded by this ‘series’ – the Aymestry Limestone – is diachronous and, in the north-west part of Herefordshire, tends to be variable in its […]

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 […]

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 […]

Jurassic Blue Lias siltstone, Rainbow Hill, Worcester

Blue Lias

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

A blueish-grey lime mudstone used quite widely in South Worcestershire. Few if any traces remain of the quarries which were presumably backfilled and now lie under agricultural land. Originally most building may have been rendered as The Lias generally weathers quite poorly when exposed. It is easily recognised by its pale blueish colour, thin tabular […]

Cotswold Stone

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

The golden brown to cream stone that typifies Cotswold villages is a Jurassic oolitic limestone and occurs in an outcrop extending from Bath all the way to Lincoln. It is composed of ooids, small spherical or ovoid concretions of calcium carbonate formed in tropical seas far from sources of sediment. Shell fragments and other fossils […]

Bath Stone on Lloyds Bank Ltd., Leominster

Bath Stone

January 1, 201512:00 pmMay 26, 2016 8:51 am

Very high quality Jurassic limestone from the Chalfield Oolite Formation quarried in a variety of locations east of Bath. Many of the Bath Stones come from the Bath Oolite Member which is a true freestone, lacking fossils or lamination. The quality of the best Bath Stones is such that they have been mined deep underground. […]

Portland Stone

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

This famous Upper Jurassic building stone is one of the most important in the country having been used for iconic buildings including St. Paul’s Cathedral and the Cenotaph. It is easily recognised by its pure white or grey colour – lacking the buff or orange tinges of Bath and Cotswold Stone – and its fine […]