Just to be clear- gravel does not occur in nature. It by definition requires handling, some sort of process-ees. It must be crushed, cleaned, sorted, sifted, or washed to be gravel, otherwise it's rocks.
Or cobble. Could be cobble I suppose.
I must disagree with that, in nature there is a process that creates gravels , its called WATER , either fast flowing or in solid form crushing, rolling , grinding, creating huge or small deposits of well graded gravel , some called glacial moranes, or gravel beds or spawning beds for fish bearing streams,, need i go on in your education about man processed gravel products, because there are probably thousands of named products around the globe.
norm your teacher and mentor-----smile
