What small object is made of ice and dust?

I know that some meteors can be made out of that.

Don’t use up to much of them it leads to pollution

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).