Rocks Flashcards
Granite
It was formed when molten lava forced its way into the earths crust,it cooled slowly over millions of years and has large crystals, it varies on colour from pink to grey to black , it can be found in mourne Mrs in Wicklow , and is used for building monuments
Sedimentary
Sedimenatry rocks were formed out of sediments of other rocks , animal life and plant life
Limestone
Limestone was formed on the beds of warm shallow seas and was made up of skeletons of small sea creatures compressed and cemented together, it is permeable, and is laid down in strata , it varies on colour from grey to white. It it used for cement and monuments. It is found in the burren in co Clare in soil and bogs
Quartzite
It was formed when sandstone came into contact with magma during the folding periods, it varies in colur from grey to white, has grains of Quartz packed tightly together it is used for monuments and is hard so is caps on some mountains, found in errigal, the grat sugarloaf and croagh patrick
Basalt
Is an igneous rock formed when lava spread across the earths crust,it cooled quickly and solidified because it was exposed to air,it has tiny crystals,it varies on colour from: dark grey black and brown. It is found in giants causeway and can be used for pavements