The Wilmslow Sandstone Formation (named from the town of Wilmslow in Cheshire) comprises up to 900m thickness of early Triassic sandstones with occasional siltstones.
The Kinnerton Sandstone Formation (named from the twin villages of Higher and Lower Kinnerton on the England/Wales border west of Chester) is a sequence which ranges from 0m to over 150m thickness of largely aeolian sandstones of early Triassic age.