You and your group have learned so much!!! You have learned about the three different types of rocks and their features, fossils, the rock cycle, and so much more. By now, you've also figured out who was right, Sam or Kate. Can fossils be found in igneous rocks? The conclusion that you have come to should be that fossils can not be found in igneous rocks, but they can be found in both sedimentary and metamorphic rocks. Kate was right!