The iron deposits occur in more or less fine-grained gneiss or granulite (Gellivara, Grangesberg, Norberg, Striberg), or separated from the granulite by masses of augitic and amphibolous minerals (gronskarn), as in Persberg and Nordmark.
Other long-tailed pterodactyles occur well preserved in the Upper Jurassic (lithographic stone) of Bavaria and Wurttemberg, which is so fine-grained as to show impressions of the wing-membrane.
Slates and fine-grained sandstones appear here freely through the glacial drift.
All along the bank of the river Chambal the country is deeply intersected by ravines; low ranges of hills in the western portion of the state supply inexhaustible quarries of fine-grained and easily-worked red sandstone.
Often this felsitic devitrified glass is so fine-grained that its constituents cannot be directly determined even with the aid of the microscope, but chemical analysis leaves little doubt as to the real nature cf the minerals which have been formed.
For sculpture and various architectural purposes white, fine-grained marble was brought from Paros and Naxos.
It is comparatively fine-grained and of a greyish colour.
A particularly fine-grained mud is formed on the low coasts of the eastern border of the North Sea by a mixture of the finest sediment carried down by the slow-running rivers with the calcareous or siliceous remains of plankton.
Schleissen, to split), in geology, a fissile, fine-grained argillaceous rock which cleaves or splits readily into thin slabs having great tensile strength and durability.
Good building materials are obtained from many of the rocks of the country, among which the Raialo limestone (a fine-grained crystalline marble) and the Jaisalmer limestone stand pre-eminent.