泉南酸性火砕岩類で二分される領家花崗岩類(I)

抄録

On the south of Osaka Prefecture, the Sennan acidic pyroclastics and several types of granitic rocks of the Ryoke metamorphic belt are widely distributed. The Sennan pyroclastics had been considered to disappear on the east of the River Ushitaki, but the writers have found that they extend to the far east of the River Makio (Fig. 7). Among the granitic rocks some types are unconformably covered with the Sennan pyroclastics and other ones intrude the pyroclastics. Thus, the granitic rocks in this area have been divided into two groups, the older (Pre-Sennan granites) and the younger (Post-Sennan granites).