Sedimentary and Metamorphic Rocks Eric Angat Teacher http

Sedimentary and Metamorphic Rocks Eric Angat Teacher

http: //stone-network. com/petrology/sandstone. html

Sedimentary Rocks

Arkose # 11 Arkose is a raw, coarse-grained sandstone, deposited very near its source, that consists of quartz and a significant proportion of feldspar. http: //geology. about. com/od/rocks/ig/sedrockindex/rocpicarkose. htm

Gypsum # 12 Rock gypsum is an evaporite rock that forms as shallow sea basins or salt lakes dry up enough for the mineral gypsum to come out of solution. http: //geology. about. com/od/rocks/ig/sedrockindex/rocpicarkose. htm

Sandstone # 13 Sandstone rocks are sedimentary rocks made from small grains of the minerals quartz and feldspar. They often form in layers. They are often used as building stones. http: //www. fi. edu/fellows/fellow 1/oct 98/expert/sandstone. htm

Shale # 14 Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call "mud". This composition places shale in a category of sedimentary rocks known as "mudstones". Shale is distinguished from other mudstones because it is fissile and laminated. "Laminated" means that the rock is made up of many thin layers. "Fissile" means that the rock readily splits into thin pieces along the laminations. http: //geology. com/rocks/shale. shtml

Limestone # 15 Limestone is a rock that is composed primarily of calcium carbonate. It can form organically from the accumulation of shell, coral, algal and fecal debris. It can also form chemically from the precipitation of calcium carbonate from lake or ocean water. Limestone is used in many ways. Some of the most common are: production of cement, crushed stone and acid neutralization. http: //geology. com/rocks/sedimentary-rocks. shtml

Conglomerate # 16 A conglomerate is a rock consisting of individual clasts within a finer-grained matrix that have become cemented together. Conglomerates are sedimentary rocks consisting of rounded fragments and are thus differentiated from breccias, which consist of angular clasts. [1] Both conglomerates and breccias are characterized by clasts larger than sand (>2 mm). http: //en. wikipedia. org/wiki/Conglomerate_(geology)

Metamorphic Rocks

Amphibolite # 21 Amphibolite is a rock composed mostly of amphibole minerals. Usually it's a hornblende schist like this as hornblende is the commonest amphibole. http: //geology. about. com/od/rocks/ig/metrockindex/rocpicamphibolite. htm

Marble #22 Marble is made by regional metamorphism of limestone or dolomite rock, causing their microscopic grains to combine into larger crystals. http: //geology. about. com/od/rocks/ig/metrockindex/rocpicmarble. htm

Schist # 23 Schist is formed by regional metamorphism and has schistose fabric —it has coarse mineral grains and is fissile, splitting in thin layers. http: //geology. about. com/od/rocks/ig/metrockindex/rocpicschist. htm

Slate # 24 Slate is the lowest grade of metamorphic rock, with a dull luster and strong cleavage. It is derived from shale by regional metamorphism. http: //geology. about. com/od/rocks/ig/metrockindex/rocpicslate. htm

Gneiss # 25 http: //geology. about. com/od/rocks/ig/metrockindex/rocpi cgneiss. htm Gneiss ("nice") is a rock of great variety with large mineral grains arranged in wide bands. It means a type of rock texture, not a composition.

Anthracite # 26 Metamorphic Rock Highest Quality of Coal Known as "Hard Coal" High Luster Higher than 87% carbon content Mostly Mined in China, Vietnam, Pennsylvania, Russia, and South Africa Used to Heat some Stoves and Furnaces and as an Ingredient in Charcoal Briquettes http: //earthchanges. swsd. wikispaces. net/Matthew. ED 21%27 s+Portfolio

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