These metamorphic rocks include gneiss, quartzite, and schist. An Arenigian age quartzite formation is equivalent to the Amorican Quartzite. Some examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite. The mountains are composed of granite, gneiss, marble, schists and quartzite. It is a common constituent of schist, gneiss, quartzite and other metamorphic rocks. The bedrock consists of phyllite, quartzite and schist. Sinkholes also occur in sandstone and quartzite terrains. They are derived from sandstone, quartzite and basalt. The found materials include Basalt, Granite, Diorite, Marble, and Quartzite. At Raglan Range the rocks are a mixture of quartzite and knotted schist. The sand later hardened into sandstone and later still metamorphosed into the thick Eureka Quartzite. Grinding stones were made of quartzite, granitic, or metamorphic rock. Deposits of construction materials such as granite, quartzite, and limestone are also abundant. At this outcrop, it consists of massive thick beds of micaceous quartzite. When it weathers, it leaves behind a pure white quartzite gravel.