Density may differ drastically amongst various rock styles as a consequence of variances in mineralogy and porosity. Understanding of the distribution of underground rock densities can guide in interpreting subsurface geologic framework and rock type. gneiss Gneiss shows a nicely-made foliation in addition to a improperly produced schistosity and cleavage. https://sticksofrock89001.bloggactif.com/37705417/a-review-of-sticks-of-rock