Sedimentary rocks goodbyebyesunday Awesome sedimentary rocks landscape in Tung Ping Chau island (China) http://iespebilingue.wikispaces.com
Let’s learn some vocabulary before learning about sedimentary rocks! http://iespebilingue.wikispaces.com concrete calcite feldspar stick turn into layer bottom settle bit wear away erode cemento calcita feldespato pegar(se) convertirse capa el fondo asentar un poco arrastrar erosionar piedra de construcción building stone panel de yeso wallboard molde mold escayola plaster guijarros pebbles cuarzo quartz pizarra shale yeso gypsum conglomerado conglomerate piedra caliza limestone piedra arenisca sandstone
How are sedimentary rocks formed? For millions of years, little pieces of our earth have been eroded and worn away by wind and water. These little bits of our earth settle to the bottom of rivers, lakes, and oceans ( sedimentation ). Layer after layer of eroded earth is deposited on top of each. These layers are pressed down more and more through time ( compaction ), until the bottom layers slowly turn into rock ( cementation ). http://iespebilingue.wikispaces.com Layer – capa Turn into - convertirse
layers or rock particles.
Compaction presses the
Cementation sticks the
This creates sedimentary rocks .
Examples of sedimentary rocks
They are made from small grains of the minerals quartz and feldspar.
They often form in layers.
They are often used as building stones.
They are made from the mineral calcite.
It is used in concrete.
It is an excellent building stone for humid regions.
They are made up of large sediments like sand and pebbles.
The sediment is so large that pressure alone cannot hold the rock together;
it is also cemented together with dissolved minerals.
They are made up of sulfate mineral.
It is very soft.
It is used to make plaster, casts, molds, and wallboards.
It is formed from clay that is compacted together by pressure.