Phosphate Hill is a small inlier of Ordovician rocks enclosed in an envelope of ?Lower Devonian quartzose sandstones and shales. Lithological layering (S0) within the Ordovician inlier shows tightB1folds with a second group of folds (B2) superimposed. The orientation and shape of theseB2folds are highly variable. The overall structure of the area falls naturally into two subareas: Subarea 1 comprises sub‐horizontal east‐westB1folds which are overturned to the north and show slides on their lower limbs;B2folds in this subarea are small‐scale features. Subarea 2 is dominated byB2folds and contains a large S‐shapedB2fold in its eastern part.