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Rock Cycle
Plate Movement
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Key Terms/ Vocab
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Breccia is formed in a very similar way as conglomerate. The difference is, is that breccias fragments are sharper, and angular. These fragments have not been eroded by water, glaciers, or wind long enough to be rounded and smoothed. This form of sedimentary rock is formed by different pebbles, and stones cementing together. Cementing agent: CaCO3


Conglomerate is a clastic sedimentary rock. It is similar to breccia; forming from the cementing of pebbles. It is formed by river movement and/or other water movement. The cementing agents for conglomerate are the same as breccia. CaCO3
The pebbles in conglomerate are more rounded than the stones found in breccia. This is one of the features that makes them different.


Limestone is a non-clastic sedimentary rock. It is produced by the mineral calcite, and sediment. The calcite can be gotten from the water in the ocean, or it can be formed from sea creatures that secrete lime; algea and coral. Limestone will fizz if acid is put onto it.


Halite is common table salt. Believe it or not. it is formed when salty lakes or sea beds dry up. When the water evaporates, it causes the salt to precipitate; forming the salt crystals. it is usually colorless, but it can also be a reddish color due to iron oxides in the water where it was formed.


Shale is a sedimentary rock that forms when clay is compacted together by pressure. Shale is used to make bricks, and other meterial that is fired in a can be any color, but is generally greenish grey, to grayish black. It is relatively soft, and has a greasy soft feel when it is freshly exposed, but hard and brittle when dry. Shale usually splits into thin sheets or plates.