Uluru and Kata Tjuta were formed by 4 periods of time these were creating the fans, pressing the fans, folding tilting and wearing away. I’ll talk about all of them, but first I’ll give you information about the creating of the fans. 550 million years ago the Peterson ranges that are a few kilometres of Kata Tjuta were much taller from what they are now. After time rain water eroded the rock and sand dropped down the mountain creating fan shaped on the surrounding plains. Two fans were produced one sand based or water smoothed rocks both became kilometres deep. The next step was pressing the fans, 500 million years ago the whole area became covered in sea. Sand, rock and debris fell to the bottom of the sea including the fans that were formed. The pressure of all the substances at the bottom of the sea turned into rock and making it conglomerate rock and the sand fan turned into sandstone. Another stage is folding and tilting this happened 400 million years ago where all the water disappeared and the whole of central Australia, this land was subjected to immense force resulting rocks to fold and tilt, the rock fan tilted a bit but the sand fan turned 90 degrees making the layers almost stand on end. The last stage is wearing away this was 300 million years ago and still happening which is making the softer rock eroding away leaving parts of the old fans visible. Kata-Tjuta has the old rock fan whereas Uluru it has the sand fan. Many years ago Uluru and Kata-Tjuta was covered in windblown sand plains and dunes. Uluru and Kata-Tjuta is truly a rock slab which doesn’t end at sea level it continues to 5-6km down into the ground.