The main constituent rocks are holocrystalline aegirine phonolite, so-called tinguaite
, nepheline syenite, and vent-filling intrusive pyroclastic rocks.
Two matches have been made between Sydney region ground-edged implements and sources outside the region: (a) a hatchet from Curracurrang 1 rockshelter in Royal National Park is made of tinguaite
, an unusual rock known to crop-out along the south coast only in the Minnamurra area (Branagan & Megaw 1969:14-15); and (b) a ground-edged implement found at Botany Bay (AM Reg.
Tuperssuatsiaite occurs in the abandoned Bortolan tinguaite quarry, about 8 km west of the center of Pocos de Caldas city, within the geological domain of the Pocos de Caldas alkaline complex (Fig.
Tuperssuatsiaite from Pocos de Caldas occurs inside and in the immediate vicinity of miaroles in the tinguaite.
The rock has been variously [TABULAR DATA FOR TABLE 1 OMITTED] described as tinguaite
(Clark, 1955; Hodgson, 1969), trachytic phonolite (Hanes, 1962) and nepheline syenite (Currie, 1976; Globensky, 1985).