Igneous
most common igneous rock
Granite
any trace of plant or animal life in a rock
fossil
type of metamorphic rock made up of layers like the leaves of a book
foliated
small deposits of igneous and metamorphic crystals
gemstones
conglomerate
sedimentary
type of igneous rock that is formed at the earth's surface
Extrusive igneous rock
sedimentary rock that is the only stone formed by living animals
reef limestone
metamorphic rock that does not have a layered appearance
unfoliated
the rarest, most durable and beautiful gems
precious stones
pumice
igneous
type of igneous rock that remains in a pocket below the surface
Intrusive Igneous rock
Sedimentary rock used to make glass
sandstone
metamorphic rock that began as shale
slate
the hardest of all known minerals, found in "pipes"
diamond
obsidian
igneous
The hardest material that composes the earth's crust
Rock
sedimentary rock formed by chemical sediments and used for salting roads and flavoring foods
halite
metamorphic rock that begins as limestone
marble
Most commonly used metal
iron
marble
metamorphic
Three types of rocks
Igneous, Sedimentary, Metamorphic
Percentage of the earth's surface covered by sedimentary rock
75%
What type of rock is slate
metamorphic
Any rock containing a metal together with impurities
Ore
limestone
sedimentary