THETG - Grimston Thetford-type ware

"Buff/grey to brown; very coarse, soft to hard fabric with abundant quartz, occasional grog, iron ore and flint inclusions" (after Little 1994, 84). Fine sandy matrix containing common ill-sorted angular and sub-angular medium quartz sand (mostly clear, sub-angular, up to 0.8mm), sparse to moderate fine to medium ferrous oxide and rare chalk and flint. Can be fully reduced to dark grey, or may have buff surfaces and margins.

Thin-section description (H. Page): Poorly sorted, equant, rounded to sub-rounded, coarse to fine sand sized quartz and rare polycrystalline quartz. Common ferruginous opaque minerals and rare rounded sand sized chert. Non-calcareous, heterogenous, oxidised moderately active, light brown-red clay matrix with rare brown streaks and lighter brown streaks, in addition to common rounded, dark red-brown concordant textual features with high optical density. Common meso- parallel walled planar voids with tapered ends.