C.K.K.K.+5.3

toc =Section 3 (5-3) Sedimentary Rocks=

Vocabulary
sediment- solid, small pieces of material that comes down from rivers from rock or a living things. erosion- force to destructive rocks,and living things (such as heat and cold, rain, waves,and grinding ice) deposition- the action of wind, snow, etc. to drop sediments to settle compaction- to make sediments smaller cemetation- the action which dissolved materials crystallize on sediments and glue them together clastic rock- kind of a sedimentary rock that is made up of small rock particles organic rock- sedimentary rock that contains part or were made up by living things chemical rock- a sedimentary rock that dissolved minerals crystallize to form a rock

From Sediment to Rock

 * Sedimentary rock is formed when small particles are deposited and glued them together.
 * Erosion is a destructive force that breaks up and wear away rocks.
 * Deposition is when water, wind, etc. slows down and deposits sediments in the lake, ocean, etc.
 * Compaction is an action which makes each sediment smaller by its own weight.
 * Cementation is when dissolved mineral in water crystallize on sediments so that it would glue them all.

Types of Sedimentary Rock

 * Basically, sedimentary rock is divided into three types according to the type of sediments each rock include.
 * Clastic Rocks
 * Clastic rock contains broken parts of other rocks.
 * Within clastic rocks, they are divided according to size of the sediments.
 * Shale is the one of common clastic rock.
 * It is made from clay
 * Sandstone
 * It is made from sands at beaches, sand dunes, etc.
 * It has many small holes because the compaction that happens to sandstones doesn't fill all open spaces.
 * Conglomerate and Breccia
 * Conglomerate and breccia contains different sizes of rock fragments.
 * The rock fragments' size differ from sand and pebbles to boulders.
 * If the rock fragments are round, that rock is conglomerate.
 * If there are large and sharp-edged rock fragments inside, it is breccia.

Organic Rocks

 * Organic rocks must have particles of living things or made from living things such as bones, plants, etc.
 * Coal
 * Coal is a remains of swamp plants buried in water.
 * Limestone is made from calcite which is made from shells of dead coral, clams, oysters, etc.

Chemical Rocks

 * Chemical rock is basically a crystal of dissolved mineral.
 * Some limestone is considered a chemical rock.
 * Chemical rock can also form from mineral deposits.
 * Rock salt is a type of chemical rock and it is formed when mineral halite evaporates.
 * Gypsum is another chemical rock formed from evaporation of a mineral.

Uses of Sedimentary Rocks

 * People used limestone and sandstones as building materials.
 * This is because they are soft enough to cut into blocks or slabs.
 * Today, they are used for decoration.
 * Limestone also has industry uses.
 * It is put into the when smelting an iron.
 * Also it is mixed with cement.