Momoyama
The granitic
rocks around Mt. Tsukuba are divided into Tsukuba Granite
and Kabasan Granite. At this point, intrusive relationship
between these can be observed. In
addition, fine-grained diorite (so-called meta-diabase)
is also exposed.
Tsukuba Granite in left is intruded by Kabasan
Granite in right.
Fine-grained diorite in granitic
rocks.