original: These rock formations are characteristically composed of sandstone with layers of quartz.
simplifications: These rock formations are composed of sandstone with layers of quartz. These rocks are made of sandstone and quartz. These rocks are made of sandstone and quartz. These rock formations are made of sandstone with layers of quartz. These rock formations always feature sandstone with layers of quartz. These rock formations are made of sandstone with layers of quartz. Rock formations are composed of sandstone with layers of quartz. These rock formations are normally made up of sandstone and quartz. The rock formations are composed of sandstone with layers of quartz. These rock formations are typically made of sandstone with layers of quartz.