Geology
The summit and upper slopes are formed from the coarse and pebbly Chatsworth Grit, a thick sandstone which forms a part of the Millstone Grit and which dates from the Namurian stage of the Carboniferous period. The lower slopes are formed from mudstones which are not generally exposed. The hill owes its shape in part to the passage of ice around its flanks in successive ice ages.
Read more about this topic: The Cloud (Peak District)