क्वार्ट्ज-रेत इसके अंग्रेजी अर्थ का उदाहरण

The Mountains are quartz sandstone and were formed about 400 million years ago through irregular rising patterns of the earths crust, and with about 318 million years of erosion these tall and skinny mountains were formed.

The Devonian bedrock here is, especially west of the Elbbach, overlain with thick sedimentary fill from the Tertiary (clays, sands, gravels) of which especially the quartz sand has afforded the region some economic importance.

The ranges separate the main Kimberley plateau from the southern Fitzroy plains and consist of quartz sandstone intruded by dolerite.

As the Poquessing passes along the border between Philadelphia and Bucks County, the Pennsauken and Bridgeton Formations, from the Tertiary, consisting of quartz sand, overlie the Wissahickon Formation, but the creek has eroded below these formations to flow along the Wissahickon Formation.