The Gladstone Formation is a stratigraphic unit of Early Cretaceous (Aptian) age in the Western Canada Sedimentary Basin.

[2] It is present in the foothills of southwestern Alberta and is named for outcrops along Gladstone Creek, a tributary of the Castle River south of the Crowsnest Pass.

The lower portion of the formation consists of fine-grained sandstone interbedded with siltstone, mudstone and claystone.

The upper portion consists of limestone beds and coquinas of fresh water shells, interbedded with calcareous mudstone, siltstone and fine-grained sandstone.

[3] The Gladstone sediments were derived from erosion of mountain ranges to the west, transported eastward by river systems, and deposited in a variety of floodplain environments.