The first rock is mainly andesite clinkering agglomerate, andesite breccia, dacite breccia, rhyolite breccia and rhyolite clinkering tuff.

正火山碎屑岩亚类岩石类型主为山熔结集块岩,山、英及流纹火山角砾岩以及流纹熔结凝灰岩。