That is why we find dinosaur fossils in Alberta and the area is a good source of natural fuels. Metamorphic Rocks Metamorphic rocks are rocks that have changed. Metamorphic rocks were originally igneous or sedimentary, but due to movement of the earth's crust, were changed. If you squeeze your hands together very hard, you will feel heat and pressure. When the earth's crust moves, it causes rocks to get squeezed so hard that the heat causes the rock to change.
Marble is an example of a sedimentary rock that has been changed into a metamorphic rock.
Minerals A mineral is composed of the same substance throughout. If you were to cut a mineral sample, it would look the same throughout. There are about 3000 different minerals in the world. Minerals are made of chemicals - either a single chemical or a combination of chemicals. There are 103 known chemical elements.