orbicular diorite

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Diorite — classification on QAPF diagram Di … Wikipedia
napoleonite — napolˈeonite noun An orbicular diorite found in Corsica, Napoleon I s native island • • • Main Entry: ↑napoleon … Useful english dictionary
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Granite — For other uses, see Granite (disambiguation). Granite Igneous Rock Granite containing potassium feldspar, plagioclase feldspar, quartz, and biotite and/or amphibole Composi … Wikipedia
Napoleonite — Napoleonite, also called corsite because the stone is found in the island of Corsica, is a variety of diorite which is characterized by orbicular structure. The grey matrix of the stone has the normal appearance of a diorite, but contains many… … Wikipedia
Geology of Alderney — Although Alderney is only five kilometers long, it has a geological history spanning half of the life of the earth. Part of the Armorican massif, it has similarities in its rock to the neighbouring Normandy and Guernsey.Geological historyRelics… … Wikipedia

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