 The highest peak is Scafell Pike, , and at least three other summits exceed making them Furth Munros.The mountains are chiefly Ordovician slates and volcanic rocks, with some limestone and outcrops of other rock types.The peaks were catalogued and described in Alfred Wainwright's seminal "Pictorial Guide to the Lakeland Fells" series of books, which listed 214 summits, which have subsequently become known as Wainwrights.