Evolution is the process by which a species changes over time.
• Most fossils are found in sedimentary rock that often forms in layers.
• The lower layers of this canyon contain the fossilized remains of many extinct animals.
• Trilobites, now extinct, lived in marine environments over 500 million years ago.
• Most fossils are found in sedimentary rock that often forms in layers.
• The lower layers of this canyon contain the fossilized remains of many extinct animals.
• Trilobites, now extinct, lived in marine environments over 500 million years ago.
Click on the extinct animal whose remains have been found in sedimentary rock.