Compléter Fill in AEVersion en ligne Practice reading and idiomatic expressions par CB Education 1 moss bowl lake south blue years land rock Kerið Crater is a crater in the part of the country Iceland . A crater is an area of shaped like a . Kerið Crater is like a deep , oval - shaped bowl . It has steep sides . The sides are made of reddish . They also have some green moss . This crater formed thousands of ago , when a volcano caved in . Now , the crater has a at the bottom . The lake is shallow and looks . With the blue lake , red rock , and green , Kerið Crater is beautiful to look at !