calcite

Rock type: 
Age: 
3 millions years

Russia, Khabarovsk Territory, the right slope of the Kiya river valley. Form a cover. Porous olivine, pyroxene-olivine basalts and basaltic andesites. Olivine forms idiomorphic crystals 0.2-1.5 mm in size, partially or completely replaced by iddingsite, rhombic pyroxene is in the form of tabular grains 0.5-1.5 mm in size. The age of the rocks is 15 million years. Sovgavanskaya series. Pliocene.

Rock type: 
Age: 
720 millions years

Russia, Perm region, Saranovskoe chromite deposit. Saranovskiy chromite-bearing gabbro-peridotite massif. Possesses large reserves of chromite ores. The outcropping area of ultrabasic rocks is only 0.22 km2, with a length of 1700-1800 m and a width of about 200 m. The maximum width of the massif in the middle part, including gabbroids, is about 400 m. Its strike is submeridional (0-345 °).

Rock type: 
Age: 
15 millions years

Russia, Khabarovsk Territory, village Krasnoselskoye. Pyroxene-olivine, olivine basalts.  Form a cover. Gray, with a violet hue, dark gray, porous, with a porphyry structure. Phenocrysts are represented by: labrador, olivine, augite, hyperstene. Size from 0.5-1 to 2-3 mm. Epidote and chlorite are formed on pyroxenes. Iddingsite develops on olivine. The pores are usually filled with calcite, zeolites, chlorite and epidote. The age of the rocks is 15 million years. Kizinskaya series.

Rock type: 
Age: 
15 millions years

Russia, Khabarovsk Territory, village Sarapulskoye. The first and second photo, top-down: quaternary clay, sand, loam; basalt weathering crust; pillow lava; the lowest rocks are basalts. They are in the third photo. Pyroxene-olivine, olivine basalts.  Form a cover. Gray, with a violet hue, dark gray, porous, with a porphyry structure. Phenocrysts are represented by: labrador, olivine, augite, hyperstene. Size from 0.5-1 to 2-3 mm. Epidote and chlorite are formed on pyroxenes. Iddingsite develops on olivine. The pores are usually filled with calcite, zeolites, chlorite and epidote.

Rock type: 
Age: 
15 millions years

Russia, Khabarovsk Territory, village Sarapulskoye. Pillow Lava. Pyroxene-olivine, olivine basalts.  Form a cover. The age of the rocks is 15 million years. Kizinskaya series. Miocene.

Rock type: 
Age: 
1300 millions years

Russia, Irkutsk region, valley of the Big Chanchik creek. Carbon-containing phyllite schists with carbonate (anchorite, calcite). Angarskaya series, upper pack. Mesoproterozoic.

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: 
15 millions years

Russia, Khabarovsk Territory, Sikachi-Alyan. Pyroxene-olivine, olivine basalts.  Form a cover. Thickness - 28 metres. Gray, with a violet hue, dark gray, massive, dense, often porous, with a porphyry structure.

Rock type: 

Sardinia, Monte Corrasi. Calcite vein in Middle-Upper Jurassic dololostones.

Rock type: 
Tags: 

Sardinia, Monte Corrasi. Calcite vein in Middle-Upper Jurassic dololostones.