Burwardsley Hill Bed

Burwardsley Hill Bed (BRWH)

Burwardsley Hill Bed

Previous nomenclature

Keuper Sandstone Conglomerate (Poole and Whiteman, 1966) Sandstone Conglomerate (Earp and Taylor, 1986)

Parent unit

Helsby Sandstone Formation

Derivation of name

From Burwardsley Hill (SJ 5078 5573), where it is well exposed

Type section

Burwardsley Hill, Cheshire (SJ 5086 5562 to 5108 5612) (Earp and Taylor, 1986)

Reference sections

None

Extant exposures/sections

The bed is well-exposed at the type section on Burwardsley Hill, and there are scattered quarry exposures in that area.

Lithology

Conglomerates, pebbly sandstones and sandstones, cross-bedded and coarse-grained. Pebbles are mainly of quartz and quartzite, up to 5 cm in diameter.

Lower boundary

The lower boundary is placed at the downward change from conglomerate and pebbly sandstone to red-brown, fine-to coarse-grained sandstones with thin beds of red-brown mudstone, of the underlying Wilmslow Sandstone Formation.

Upper boundary

At the upward change from mainly conglomerates to sandstones and pebbly sandstones in the Helsby Sandstone Formation.

Thickness

0 to 11 m

Age

Anisian (early Mid Triassic)

Equivalent units

None

Geographical extent

From just south of the village of Penley (SJ 41 39), Cheshire, to near the village of Beeston (SJ 54 58), Cheshire.

Subdivisions

None