Rocks Revision Junior Cert

Rocks Revision Junior Cert

1. Igneous

   • Granite
     • cools inside the earth
     • Wicklow
     • Mourne Mountains
   • Basalt
     • cools on surface
     • Giants Causeway in Antrim

2. Sedimentary

   • Limestone
     • Most common rock in Ireland
     • Burren Co Clare
     • sediments of animals fish plants compresses and cemented together
     • Horizontal lines called bedding planes
       • Layers called Strata
   • Sandstone
     • Munster Magillycuddy Reeks Kerry
     • Comeragh
   • Coal
   • Shale

3. Metamorphic

   • Rocks Changed by heat or pressure
   • Marble
     • limestone changes to marble
       • Connemara (Green)
       • Cork(red)
       • Kilkenny(black)
   • Quartzite
     • sandstone changes to Quartzite
       • Bonegal
       • Howth

4. Rocks are a natural resource

   • Used for Buildings Ex GPO (limestone)
     • Roads
       • Headstones Kitchens tops
         • Glass is made fromSsandstone/ Quartzite