quartz

Rock type: 
Age: 
2300 millions years

Russia, Irkutsk region, watershed of the rivers Homolkho and Imnyakh, gold deposit "Golets Vysochayshy", north wall of the pit. Carbon quartz-mica schists. The first photo shows quartz veins in the pit wall. Schists contain veins, lenses, and impregnations of pyrite and pyrrhotite. Khomolkhinskaya series. Thickness 650 meters. Paleoproterozoic.

Rock type: 

Russia, Irkutsk region, the upper reaches of the creek of Alexander Nevsky, gold deposit - "Nevskoe". Gold ore.Quartz sulfide mineralization in paleoproterozoic quartz sandstones.Mineralization includes: pyrite, arsenopyrite, pyrrhotite, their oxides, gold, quartz and carbonate-quartz veins.

Rock type: 
Age: 
2350 millions years

Russia, Irkutsk region, the upper reaches of the creek of Alexander Nevsky, gold deposit - "Nevskoe". Quartz sandstones with quartz and quartz-arbonatic veins. Fine grained. Cement - quartz-sericite, with carbonaceous matter. Aunakitskaya series. Host rocks for gold ore mineralization of the Nevskoye deposit. Paleoproterozoic.

Rock type: 
Age: 
1200 millions years

Russia, Republic of Buryatia, Taksimo. Brownish-lilac and greenish large-pebble conglomerates with interbeds of sandstones. Pebbles and boulders in conglomerates up to 80 centimeters in size. Formed by sandstones, shales, granites and various effusive rocks. Sandy cement is metamorphosed to a saussurite-sericite aggregate, with feldspars, quartz, epidote and iron hydroxides. The interlayers of sandstones are green, greenish-gray, polymictic and quartz. Polymictic sandstones are formed by quartz, plagioclase and potassium feldspar. Mukhtunnaya series. Thickness 1300 meters.

Rock type: 
Age: 
2300 millions years

Russia, Irkutsk region, Big Kadali river valley. Carbon quartz-mica schists. Khomolkhinskaya series. Thickness 650 meters. Paleoproterozoic.

Rock type: 
Age: 
2050 millions years

Russia, Irkutsk region, Kadali river valley. Marbles of the Imnyakhskoy series. Light gray, greenish-bluish-gray, fine-grained. Granoblast structure, massive texture. Consist: calcite. Accessory: quartz, sericite, muscovite. Paleoproterozoic.

Rock type: 
Age: 
119 millions years

Russia, Caucasus, Stavropol Territory, Kislovodsk. Yellowish-gray fine-grained massive glauconite-quartz sandstones. Contains cohesions of calcareous sandstones and rare nest-clad leafy mudstones. Shagirtskaya series. Thickness - 25 meters. Fossil: Dufrenoya furcata Kaz., Cheloniceras seminodosum Sing., Deshayesites deshyi Papp., Panope gurgitis Bron., P. akuschaensis Mordv., Thetironia minor Sow., Dosinimeria para Sow., Deshayesites weissi Neut. et Uhl., Cheloniceras seminodosum Sing., Barbatia apptiensis Pict. et Camp., Colombiceras tobleri Jac. et Tobl., C.

Rock type: 
Age: 
119 millions years

Russia, Caucasus, Stavropol Territory, Kislovodsk. Yellowish-gray fine-grained massive glauconite-quartz sandstones. Contains cohesions of calcareous sandstones and rare nest-clad leafy mudstones. Shagirtskaya series. Thickness - 25 meters. Fossil: Dufrenoya furcata Kaz., Cheloniceras seminodosum Sing., Deshayesites deshyi Papp., Panope gurgitis Bron., P. akuschaensis Mordv., Thetironia minor Sow., Dosinimeria para Sow., Deshayesites weissi Neut. et Uhl., Cheloniceras seminodosum Sing., Barbatia apptiensis Pict. et Camp., Colombiceras tobleri Jac. et Tobl., C.

Rock type: 
Age: 
119 millions years

Russia, Caucasus, Stavropol Territory, Kislovodsk. Yellowish-gray fine-grained massive glauconite-quartz sandstones. Contains cohesions of calcareous sandstones and rare nest-clad leafy mudstones. Shagirtskaya series. Thickness - 25 meters. Fossil: Dufrenoya furcata Kaz., Cheloniceras seminodosum Sing., Deshayesites deshyi Papp., Panope gurgitis Bron., P. akuschaensis Mordv., Thetironia minor Sow., Dosinimeria para Sow., Deshayesites weissi Neut. et Uhl., Cheloniceras seminodosum Sing., Barbatia apptiensis Pict. et Camp., Colombiceras tobleri Jac. et Tobl., C.

Rock type: 
Age: 
338 millions years

Russia, Karachay-Cherkess Republic, Honey waterfalls. Pink biotite granites. Consist: plagioclase, microcline, quartz, biotite, muscovite. Malinskiy granite complex. Carboniferous.