Photomicrographs of thin sections taken from Parking de Roseau (Plane-Polarized Light – PPL); (a) group PR1: grog tempered sherd PR-62; (b) group PR2: matrix-rich sherd with very few temper (sparse grog fragments and few volcanic material) PR-104; (c) group PR3: sandy matrix with abundant volcanic cinders PR-81; (d) group PR4: sandy matrix with numerous volcanic lithoclasts and isolated volcanic minerals PR-05.