Uluru is located in Australia and it's formation took place over 500 million years ago.It is composed of sedimenatry rocks called arkose.Rapid erosion of the mountains made materials that were deposited under the sea which formed uluru.Uluru is made up of very weldege rock.The top is flat and sides are grooved due to the process of weatheration.The red colour is due to the rusting of iron.The rock reacts with water and oxygen.