👉 Hemiclastic is a type of rock that is composed primarily of quartz and feldspar, rather than iron or other metals. It is often found in areas where there are large amounts of water and high temperatures. These rocks can be very hard and resistant to weathering, making them useful for building structures and infrastructure. In terms of its geological significance, hemiclastic rocks have been used by humans throughout history as a source of construction materials, such as stone and brick. They were also used