exploitable deposit造句

Bukuru is also associated with the opencast mine workings are exploitable deposits of kaolin.
Exploitable deposits of gold are known to exist in Niger in the region between the Niger River and the border with Burkina Faso.
The exploitable deposits of fluorspar are known as " rakes ", " scrins ", " flats " or " pipes " depending on the size and shape of the voids in which the crystals were deposited.
In the same years he discovered also an exploitable deposit of Carnallite in the Oasis of Marada, and rich artesian aquifers in some zones of Northern Libya, which gave a strong impulse to the development of the agriculture.
It's difficult to find exploitable deposit in a sentence. 用exploitable deposit造句挺难的