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We all know that the rock is right. Locals everywhere! They and the mountains and canyons you can not help. We sipped, we sat on them, and we poured them out of our deals. However, to correct a definite definition … this is not something we all will be doing.

Oil Shale

Colorado Oil Shale Oil Shale is organic-rich sedimentary rocks that have contain kerogen (insoluble organic matter in sedimentary rock....


Fenestrate bryozoan in shaleGray shaleRed shale Shale is a laminated or fissile clastic sedimentary rock that composed of predominance...


Garnetite (garnet skarn)
Concepcion Garnetite (grossular garnet skarn)Tactite (multimineralic carbonate skarn)Garnetite (garnet skarn) Skarn is coarse-grained metamorphic rocks that forms by a...


Quartzose sandstone (Hinckley Sandstone, Neoproterozoic; Hinckley, Minnesota, USA)Sandstone Sandstone is a sedimentary rock and one of the most common...


French Slate, Paleoproterozoic; Snowy Range Road roadcut, Medicine Bow Mountains, Wyoming, USA
Phyllite is a foliated metamorphic rock that has been low pressure and heat. Phyllite formation from slate that is further metamorphosed so that very fine grained mica mineral achives. It composed of mainly flake-shaped mica minerals. This mica minerals is strong parallel alignment, so easly to split into sheets or slabs. Also alignment of mica grains gives a reflective sheen on phyllite. Generally Phyllite is gray, black or greenish color and frequently weathers out of a tan or brown.


Alkaline Pegmatite Rock have large crystal size minerals in it.
Pegmatite is an igneous rock that form end of the stage a magma’s crystallization. Pegmatites contain exceptionally large crystals and they contain rarely minerals than other types of rocks. They have interlocking crystals usually larger than 2.5 cm in size. Generally most Pegmatites are found in sheets of rock that are dikes and veins Also near large masses of igneous rocks called batholiths.

Moon Rock

Moon Rock taking to during the six Apollo missions, rocks were collected from the moon. The purpose of collecting the rocks was...


greywacke rock
Greywacke is variation of sandstone that saperate from other to hardness, dark color, and poorly sorted angular grains of quartz and feldspar. Generally found in Palezoic strata. Generally larger grain can be sand clast. Matrix material more than 15%.


Diorite is coarse – grained intrusive igneous rock that commonly mineralogy is plagioclase feldspar and dark colored minerals such as hornblende and biotite.It usually occurs dikes, sills and intrusions with continental crust . Diorite is usually grey to dark-grey in colour, but it can also be black or bluish-grey, and frequently has a greenish cast.


Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. It is an amorphous material known as a "mineraloid." The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture .


A granular metamorphic rock, marble is derived from limestone or dolomite. It consists of a mass of interlocking grains of calcite or the mineral dolomite. Marbles form when limestone buried deep in the older layers of Earth’s crust is subjected to heat and pressure from thick layers of overlying sediments.


The most common intrusive rock in Earth’s continental crust, granite is familiar as a mottled pink, white, gray, and black ornamental stone. It is coarse- to medium-grained. Its three main minerals are feldspar, quartz, and mica, which occur as silvery muscovite or dark biotite or both. Of these minerals