Tsukuba-san (Mt. Tsukuba)
Mt. Tsukuba is very famous mountain in Kanto area. Mt. Tsukuba
has two peaks, Nanatai-san and Nyotai-san. Late Cretaceous gabbroic rocks are
distributed around peak of the mountain.
Gabbro at Nanatai-san.
Peak of Nyotai-san. Anorthosite is
exposed.