Comprehension Check 3.6

soft, white rock formed from the cemented skeletons of microscopic sea animals

chalk or limestone

rock made of pebbles cemented together

conglomerate or breccia

any trace left in a rock by a plant or animal

fossil

another name for rock salt

halite

a beautiful rock that withstands weathering well and is commonly used for statues

marble

an igneous or sedimentary rock that has been changed by extreme pressure or heat

metamorphic rock

the only stone formed by living animals

reef limestone

a rough, crumbly rock sometimes used to make glass

sandstone

rock formed from sediments that have been pressed together

sedimentary rock

rock formed from mud or clay, often ground up and used to make bricks

shale

a weather resistant, waterproof rock formed by metamorphosis of shale

slate