The Pamphlet Collection of Sir Robert Stout: Volume 66
Varieties
Varieties.
Travertine Limestone is found at Dunstan Gorge, Otago; it makes very white lime. It has the usual porosity of this kind of stone.
Geodic Limestone.—This occurs at Hampden, Otago, and has numerous sparry cavities lined with crystallized calc-spar.
Cellular Limestone occurs at Nelson. This kind has numerous angular cells or holes.
A limestone breccia occurs at Ruataniwha.
Lithographic Limestone.—A lithographic limestone is found at Oamaru; it is a very fine-grained stone, hard and compact; its fracture is conchoidal. It occurs in concretions in the limestone, and not in slabs. The quarry is situated where the Lower Tertiary strata have undergone alterations by the extrusion of submarine igneous rocks, probably during their deposition. An extensive deposit of lithographic limestone also occurs at Abbey Rocks, near Paringa River, Westland, from which locality large slabs could be obtained. Lithographic limestone is also found in the Chatham Islands.
Chalk with black and white flints is found at Kaikoura Peninsula and in the northern part of Canterbury; a very pure bed of this material, which is of value for the manufacture of cement, occurring near Oxford.