To make this simple; igneous rocks are practically fire rocks. They are formed from magma underground. The hot magma pushes up to the Earth's surface and when that magma cools, it becomes a nice solid igneous rock. But they all do not cool the same way, which is why all rocks do not have the same results of identification. Some cool slowly underground and has large crystals formed, like the granite. Another way an igneous rock is formed is from magma that has reached to the surface. From there in their long cracks, once the magma becomes lava, the lava cools quickly and form small crystals. Basalt is one example. Obsidian is another example that was formed this way except it cooled so fast, no crystals formed but just an appearance of shiny black glass.
In this diagram, it shows that the most common igneous rocks you can find at this canyon are basalt, dikes, and granites.
Basalts are formed from the cooling of a lava. Their mineral are so small you can rarely see them unless you have a microscope. It is the most common volcanic rock in the world actually because it is so abundant on the seafloor. This rock is usually dark colored and has very fine grain.
Dikes are formed underground from being magma that then cools and become solid beneath the surface. Their texture is determined from the time has spent to cool from the magma. They can vary greatly in size from a few inches to hundreds of yards. Dikes usually form at the steep or the right angle of a surface.
Granite are formed deep underground from cooling of a magma... as a result; granites can be found as a base platform for most continents. Areas where there are sediments overlying, granites are appeared at the surface. However, they are the most common igneous rock type known in public. Their crystals and minerals are easily seen. The crystals are formed in the molten crust inside the Earth crust tools.
Basalts are formed from the cooling of a lava. Their mineral are so small you can rarely see them unless you have a microscope. It is the most common volcanic rock in the world actually because it is so abundant on the seafloor. This rock is usually dark colored and has very fine grain.
Dikes are formed underground from being magma that then cools and become solid beneath the surface. Their texture is determined from the time has spent to cool from the magma. They can vary greatly in size from a few inches to hundreds of yards. Dikes usually form at the steep or the right angle of a surface.
Granite are formed deep underground from cooling of a magma... as a result; granites can be found as a base platform for most continents. Areas where there are sediments overlying, granites are appeared at the surface. However, they are the most common igneous rock type known in public. Their crystals and minerals are easily seen. The crystals are formed in the molten crust inside the Earth crust tools.