Sedimentary Rocks By: Luca Romualdez and Sia Asmussen
What is a sedimentary rockLakes and rivers dry up and leave mud,sand, and tiny rocks behind. The rocksbecome buried and are compacted (presseddown). The top layer dries up and gets heavywhich presses down on the mud and sand.
Where are sedimentary rocks foundSedimentary rocks are found in places wherethere are cliffs and mountains. Yorkshire dales in England features manysedimentary rocks like limestone.
LimestoneThe hardness is 3 and its vitreous. Lime stone has manydifferent types of forms and colors. Limestone is in thefamily of Calcite. Cement help form and structure the rock.
FlintThe hardness is 7 and its luster is waxy. Flint is part of thequartz family. Flint has many forms. Over time lava coolsdown and hardens and becomes flint.
GypsumThe hardness of this rock is 2 and the luster is vitreous topearly.
Sedimentary vocabularyCompacted(pressed down)Weathering(Heat, cold, calm, storm)Erosion(worn away by waves, glaciers, waves,and windDeposition(replace)Sediments(the material from a liquid that settlesfrom the bottom)Cemented(a fine powder that is burned from clay
bibleographyRocks and Minerals, by Alan Wooley,Made in MineralogyDepartment, British Museum (Natural History).Rocks and Minerals, by Dr R.F. SYMES, made in NaturalHistory Museum, London.Sedimentary Rocks,by Melissa Stewart, made by OxforedMelbourne Auckland Johannesburg Blantyre GaboroneIbadan Portsmout (NH) U.S.A Chicago.