Sedimentary Rocks-Sedimentary rocks are a type of rock that is formed by the deposition and the subsequent cementation. Sedimentation is a name for the processes that causes mineral's to set into place. You can classify the three different types of sedimentary rocks by streak, color, luster and hardness.
3 types of sedimentary rocks shown above shale, limestone and sandstone. Thy can be inorganic, chemical or organic. Bioclastic when the rock contains living organisms such as fossils and shells. Limestone is bioclastic and is usually found in the ocean. The main mineral found in them s calcite. When a rock is clastic it is from debit and broken pieces of older rocks. Sandstone is a clasrtic rock because it if formed from mainly sand sized minerals and quartz. Shale another type of sedimentary rock is a fined grained clastic rock. It is composed of mud, quartz, calcite and clay.
Most limestone rocks are found in shallow water places around 30 degrease. The sedimentary rock shale can be located in gentle waters. You can find sandstone in central Europe and Mongolia.
Igneous Rock-igneous rocks are formed by the cooling and solidification of magma over time. Igneous rocks can form with or without crystals. They vary in shape ,size and color. Some contain vesicular holes from being formed by magma. They are commonly found in earths mantle or near volcanoes anywhere where magma is present.
These are three types of igneous rocks basalt, obsidian and pumice. Basalt is a common volcanic extrusive rock. Pumice is a highly vesicular rock with a rough texture. Pumice is on e of the few rocks that contains vesicular holes. Obsidian is an volcanic glass that is formed extrusive. Obsidian usually has a luster and a smooth surface.
Most igneous rocks can be found on various volcanoes.
Metamorphic-Metamorphic rocks are changed or transformed from other rocks through heat and pressure. A sedimentary or igneous rock can become a metamorphic rock after along period of time. They make up large part of Earths crust. They form at high pressure and temperatures.
A slate rock is a fine-grained, foliated rock composed of clay and volcanic ash.
The mineral gneiss is a foliated rock. it comes in many shades of colors. Also it has many wavy grooves known as bands.
Schist a metamorphic rock is wide flat rock. It consist of many minerals such as minerals include micas, chlorite, talc. A schist can display crystals too.
You can find metamorphic rocks in the Earths crust.
Also known as "rock picks" and "hard-rock hammers". These are most often used by geologists working in areas of igneous and metamorphic rocks.
Crack hammers Also known as a hand sledge. Heavy hammers to break difficult rocks.
Hand lens are used to see by geologist to see if there are crystals, other minerals or fossils present in the rock.
A rock chisel is a tool used for rock and mineral finding. They use it to scrap out debris from the mineral to help identify it.


Created with images by www.metaphoricalplatypus.com - "rocks" • Tamara Areshian - "Armenia. Nature" • Steve Snodgrass - "Strata"

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