'William Smith was the 1st to date rocks using these found within them'
Fossils (that he found inside the rocks)
THE EARTH: William Smith was the 1st to date rocks using these found within them
William Smith was the 1st to date rocks using these found within them
William Smith was the 1st to date rocks using these found within them
THE EARTH
Fossils that he found inside the rocks
THE EARTH