Perfect for the geologist out in the field and the classroom! This compact (business-card size), transparent grain size chart helps you easily compare your samples with these visualized aspects:
Scale bar from 0 to 80mm
Size bar for sand, granules, pebbles, and cobbles keyed to the scale bar above
Visual comparisons of silt/clay/mud through to very coarse sand
Visual comparisons of angular through well-rounded clasts
