Carboniferous

Iron nodule in Highley Sandstone (Halesowen Formation), Worcester Cathedral

Halesowen Formation

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

Carboniferous sandstones found in North Worcestershire from Highley to Abberley. Generally greenish to buff, the stone is commonly micaceous and cross-bedded and marked out by the frequent occurrence of small nodules of iron which appear as dark spheres or irregular patches which tend to protrude from the surface. Orange goethite iron staining, particularly on joint […]

Alveley Stone

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

In general this is a fine-grained well sorted sandstone often showing cross-bedding. In colour it is crimson to dull brownish-red, chocolate, purple and lavender sandstone from the Carboniferous age Salop Formation (Alveley Member). Quarried near Alveley, North Worcestershire, the main quarry is just outside the village. Hextons Quarry just north of Upper Arley also supplied […]

Derbyshire Stone (Namurian Sandstones)

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

Very coarse buff, pale orange or pink sandstones from the Namurian age Millstone Grit Formation of Derbyshire. They are often arkosic (have a high proportion of sand grains composed of the mineral feldspar rather than quartz) and are most recognisable by their extremely coarse grained sand and large bed/block heights. The moors between the Derwent […]

Pennant Sandstone

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

Pennant sandstone has been widely used in the 20th and 21st Centuries for paving, replacement/restoration and new build. It is a Carboniferous age Coal Measures sandstone, very well cemented and medium to coarse grained. In colour it varies from blue-grey to buff or greenish. Liesegang iron staining is often seen. Its most distinguishing feature is […]