sedimentary - formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans., igneous - rocks that have formed by the cooling and hardening of molten lava or magma, metamorphic - rocks that have been created by intense heating , coprolite - fossilised poo!, Jurassic - about 199 million years ago when dinosaurs roamed the earth, ichthyosaur - an extinct marine reptile. Mary Anning discovered a fossilised one of these., palaeontologist - someone who studies plants and animals from millions of years ago., geologist - someone who studies the earth and rocks, extinct - a species that is no longer surviving, soil - mixtures of minerals, water, air, organic matter, and countless organisms that are the decaying remains of once-living things.,

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