Question

antelope canyon is a rock formation in arizona. a canyon is a narrow valley with steep walls. antelope canyon is made of sandstone, which formed from grains of sand. the canyon is dry for much of the year. after storms, however, it can get flooded with rainwater. the smooth walls of the canyon have been cut out by flowing water during floods. what type of rock is antelope canyon made of? igneous metamorphic sedimentary

Explanation:

文中明确提到“Antelope Canyon is made of sandstone, which formed from grains of sand”，砂岩（sandstone）是由沙粒形成的，属于沉积岩。沉积岩是在地表或接近地表的条件下，由风化作用、生物作用和火山作用产生的物质经搬运、沉积和成岩作用而形成的岩石。

Answer:

C. sedimentary