Message #19133

[Gwen Parker]

The Rock is arkose, a course-grained sandstone rich in feldspar at least 2.5 km thick. Uplifting and folding between 400-300 mya turned the sedimentary layers nearly 90 degrees to their present position. The surface has then been eroded.

Depending on the time of day and the atmospheric conditions, the rock can dramatically change color, anything from blue to violet to glowing red ! Many avid photographers set up for days and record the many changing colors of Uluru.