ity: visible; position: absolute; top: 507px; left: 380px; width: 325px; height: 51px } #layer53 { visibility: visible; position: absolute; top: 39px; left: 370px; width: 325px; height: 35px } #layer55 { visibility: visible; position: absolute; top: 24px; left: 218px; width: 145px; height: 207px }-->

This diagram shows you the difference between a soil and a rock. The soil is loose, but the rock is solid and does not fall apart.