river sand vs crusher sand,
Gravel - Wikipedia
Gravel /ˈɡrævəl/ is composed of unconsolidated rock fragments that have a general particle . Both sand and small gravel are also important for the manufacture of . wide range of types, that are dredged or scooped from river beds and creek beds. . Also known as "crusher run", DGA (Dense Grade Aggregate) QP (Quarry.