Dinosaurs Inside and Out

Growing Bones

What is the composition of most dinosaur bones?

Most dinosaur bones, including teeth, are made of calcium phosphate, a material that is very hard and resistant to destruction. This explains why many dinosaur bones survive in rock layers. Those bones that didn’t survive were usually destroyed by certain geologic processes. For example, many were crushed by moving rock (from earthquakes or volcanic eruptions), or dissolved by naturally occurring acidic water moving through cracks in the rock.


This is a web preview of the "The Handy Dinosaur Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App