Chemical sedimentary rocks, like limestone, halite, and flint, form from chemical precipitation.
Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms.
Foliated means the parallel arrangement of certain mineral grains that gives the rock a striped appearance.
This type of igneous rock is often associated with its ultramafic cousin peridotite.
Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground.
Breccia perhaps refers to a class of clastic sedimentary rocks.
This type of igneous rock forms when a body of rhyolite or obsidian, for one reason or another, has a relatively large amount of water.
What type of rocks are the hardest? An extrusive rock of the same composition as syenite is called trachyte.