A set of educational posters with information about types of rock.
Igneous rocks are formed when volcanic magma cools and solidifies (from a liquid to a solid).
Examples: basalt, granite, pumice
Sedimentary rocks are formed over time from sediments of pre-existing rocks.
Examples: shale, sandstone, carbonate
Metamorphic rocks are igneous or sedimentary rocks that are changed over time by extreme heat or pressure.
Examples: marble, slate, quartzite