The rocks of the original soil, he wrote, are arranged in...
The rocks of the original soil, he wrote, are arranged in perpendicular layers or inclined towards the horizon. They are composed of quartz, granite, shale, slate and talcose.
The rocks of the original soil, he wrote, are arranged in perpendicular layers or inclined towards the horizon. They are composed of quartz, granite, shale, slate and talcose.