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gritstones's Usage Examples:

rock dated to the Carboniferous Period, consisting of coal measures and gritstones.

alternating layers of mudstones and coarse sandstones (referred to as "gritstones" or simply "grits") which were laid down in a delta system in the Carboniferous.

sandstones, particularly the coarser-grained ones are commonly referred to as gritstones or ‘grits’.

The plateau is formed from coarse sandstones ("gritstones") also dating from the Carboniferous Period and which have foundered in.

the Derwent valley bottom forms a boundary between the sandstones and gritstones of the Dark Peak to the NE and the limestones of the White Peak to the.

Around thirty small gritstones remain, although there may originally have been around 100; there are.

the county, and are mostly of Carboniferous age, comprising limestones, gritstones, sandstones and shales.

underlying geology is the Millstone Grit series with sandstones and coarse gritstones separated by bands of shale.

The situation is rather different on the gritstones of the Eastern Uplands.

"It is built of the limestone of the neighbourhood, quoined with larger gritstones; and its walls bear a very time-worn appearance.

The beds of coal in the Coal Measures are separated by layers of gritstones, sandstones, shales and mudstones of varying thicknesses.

Building materials vary from soft limestones and sandstones to harder gritstones.

The formation is composed of fluvial sediments, mainly gritstones and coarse sandstones.