Rocks

Today i learnt that there are three different types of rocks. Sedimentry rocks are one of the kinds of rocks. Fossil eveidence can be found in sedimentry rocks. They usually show layers, and can be breaked easily. The second type of rock are Igneous rocks. They have an even grain, and have an interlocking mosaic of mineral crystals. Most igneous rocks do not have an evident sign of fossils. The smaller the grains on a igneous rock, the quicker it took to cool them. The last type of rock is the metamorphic rock. They are formed from both sedimentry and igneous rock, they change into metamorphic rock. They have visible crystal and they are often wavy and not flat. They are certainly an interesting sort of rock to find.