At the Gypit occurrence, gypsum is exposed in a solitary outcrop over a length of 115 metres with thicknesses varying between 10 and 20 metres. It is dark grey to black with some pale grey and cream coloured laminae present. The gypsum is typically laminated with laminations being contorted and folded. Small-scale faults with negligible displacement are also present. In thin section the gypsum can be seen to be fine grained and granular. Very fine-grained dolomite is also present.

Contacts with the surrounding rocks are nowhere observed. A small outcrop of dark grey to black dolomite occurs a short distance to the northwest and is assigned to the Devonian Cedared Formation. The gypsum belongs to the Devonian Burnais Formation.