Weird Places Mauritania's Eye of the Sahara

The Eye of the Sahara, also known as the Richat Structure, is a geological marvel located in Mauritania. Spanning 50 kilometers, it is best viewed from space and was used as a landmark by early NASA missions. Initially thought to be a crater, it is now understood to be a deeply eroded geological dome formed over 100 million years ago. The dome's formation involved the uplift of rock layers due to magma activity beneath the Earth's surface. Over time, erosion, accelerated by hydrothermal water, wore away the softer sedimentary rocks, leaving behind a unique concentric landscape of harder metamorphic and igneous rocks.

Describe the composition of the layers within the Eye of the Sahara.

What processes contributed to the erosion of the Dome over millions of years?