Free Flashcard From Geology
What is chert ("flint")? What mineral makes it up? What is its texture? What are its characteristics? How does it form?
Chert is a sedimentary rock. It is made of quartz. Its texture is cryptocrystalline. It can be any color; conchoidal fracture; sharp broken edges; close to glassy. In terms of its origin, some of it is biogenic, and some is chemical.