Type of bituminous coal.
Elland flags
Sandstones interbedded with mudstones and siltstones in the Lower Coal Measures of West Yorkshire, once extensively quarried.
Flockton Collieries
Flockton Collieries comprised several pits, some started before 1700, around Flockton and Middlestown between Wakefield and Huddersfield in the West Riding of Yorkshire.
Glacial erratics
Rocks that differ from the type native to an area.
Irwell Valley Fault
Redirected to Pendleton Fault.
Karst cave
The most common type of cave, formed by the solution of carboniferous rocks by the action of rainwater.
Keuper Marl
Now deprecated term for multiple layers of mudstone and siltstone that occur beneath parts of the English Midlands and beyond.
Pendleton fault
Geological fault stretching for about 20 miles (32 km) from Bolton in Greater Manchester in the north along the Irwell Valley through Pendleton and south to Poynton in Cheshire.
Solution cave
Redirected to Karst cave.
The Great Stone, Stretford
Grade II listed structure in Stretford, Greater Manchester, probably the base of an Anglo-Saxon cross shaft.