In the layer of clay that formed at the time that dinosaurs became extinct. A second impact at the center of the crater. The gravity fields of the small Inner Planets were too weak to hold these elements. They are thought to be left over from formation of the Inner Planets and to be a sample of the composition of these planets . For many years there was controversy about whether lunar craters were volcanic or impact in origin.
Sinuous rilles are long winding valleys in the lunar marie.
Limestone and clean sandstone look somewhat similar to the rocks of the lunar highlands but were never considered seriously as candidate rock types for the lunar highlands. They are not a good enough color match. They are sedimentary rocks and there is no atmosphere on the Moon to deposit sedimentary rocks . They are metamorphic rocks and could not be on the lunar surface. They are igneous rocks but could not be formed on the Moon.