<P> The geological history of Earth follows the major events in Earth 's past based on the geologic time scale , a system of chronological measurement based on the study of the planet 's rock layers ( stratigraphy ) . Earth formed about 4.54 billion years ago by accretion from the solar nebula , a disk - shaped mass of dust and gas left over from the formation of the Sun , which also created the rest of the Solar System . </P>
<P> The geological history of Earth follows the major events in Earth 's past based on the geologic time scale , a system of chronological measurement based on the study of the planet 's rock layers ( stratigraphy ) . Earth formed about 4.54 billion years ago by accretion from the solar nebula , a disk - shaped mass of dust and gas left over from the formation of the Sun , which also created the rest of the Solar System . </P>
where is the geologic history of earth recorded
where is the geologic history of earth recorded
the planet 's rock layers
the planet 's rock layers