Cliff and floor of the great crater, 8 miles in diameter and 7000 feet above the sea, under mount Guajara, Charles Piazzi Smyth, c. 1881 - in or before 1886
Cliff and floor of the great crater, 8 miles in diameter and 7000 feet above the sea, under mount Guajara, Charles Piazzi Smyth, c. 1881 - in or before 1886