Rocks in example sentence
Now, it's fairly easy to find rocks of the right age at this point, because the Earth is, to a coarse degree, geologically mapped.
More example sentences with word rocks
And what starts happening is that, around young suns, young stars, all these elements combine, they swirl around, the energy of the star stirs them around, they form particles, they form snowflakes, they form little dust motes, they form rocks, they form asteroids, and eventually, they form planets and moons. 
