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1. Chemical conglomerate rocks are either inorganic or organic. Both have material carried in solution which then settles or precipitates. Organic sedimentary rocks are composed of animal or plant matter which forms strata usually on the floor of oceans or lakes. This may be created by the shells of molluscs for example. Inorganic sedimentary rocks in contrast are formed when chemicals and particles are precipitated out of a solution and form layers on whatever surface they are accumulating. Some inorganic sedimentary rocks include rock salt, and limestone. 2. These rocks from when layers of their components pile up and form visible strata. This does not always occur by compression as dried oceans and stalagmites/stalactites occur by evaporation. Dolostone- Dolostone forms as the magnesium in seawater works its way into limestone deposits removing some of the calcium. 3. http://en.wikipedia.org/wiki/Limestone organic limestone- Organic limestone is formed as the carbon skeletons of marine creatures collect on the bottom of sea floors. Shells and the hard bodies of coral polyps are excellent for forming limestone http://en.wikipedia.org/wiki/Limestone precipitate limestone- near waterfalls hotsprings and certain caves calcium rich water evaporates or precipitates its calcium content onto surfaces and this eventually builds up into structures. Stalactites and stalagmites are an example of precipitated limestone. http://en.wikipedia.org/wiki/Dolostone Dolostone- dolostone is similar to a limestone composition but contains much more magnesium instead of lime (the main component of limestone) http://en.wikipedia.org/wiki/Chert Chert- chert is a microfiborous rock formed of quartz which is usually found within other rocks. It may contain fossils and takes on many different names depending on where it is found. http://en.wikipedia.org/wiki/Gypsum Gypsum- gypsum is often found in evaporate beds at the bottom of lakes and seas. It is often found with the minerals sulphur and halite. Gypsum may also be found as a precipitate near volcanic vents. http://en.wikipedia.org/wiki/Rock_salt Halite- halite is formed in the precipitate beds of lakes and oceans. When an ocean or lake dries up there are often deposits of halite left behind along with other minerals such as gypsum and sulphur. http://en.wikipedia.org/wiki/Coal Coal- coal is formed by the death of plants and animals into bodies of water. They must then be trapped from oxidization by mud or acidic water. As they decompose these organisms form into massive peat bogs. For coal to occur metamorphosis must occur to the layer of dead organisms. 4 4. 4. Evaporites: Deposits where sea basins are draining and evaporating. As new sea water enters, the water eventually becomes saturated and salt begins to precipitate. Precipitation: The process that separates solids from a solution. This occurs when a solution becomes saturated or evaporates. Karst Topography: a landscape shaped by the dissolution of a layer or layers of soluble bedrock, usually carbonate rock such as limestone or dolomite 5. V. As a sea is in the process of drying up it often precipitates salt as new water fills it and it becomes saturated. Animal life in the sea will die as in any body of water and form strata of limestone. As the sea dries and then more water enters there will be the inclusion of another salt strata. This would produce limestone and salt layers.