Density varies noticeably between distinctive rock varieties thanks to variations in mineralogy and porosity. Understanding of the distribution of underground rock densities can support in interpreting subsurface geologic structure and rock variety. gneiss Gneiss displays a very well-created foliation and also a badly developed schistosity and cleavage. It is actually https://sticks-of-rock68890.bloguetechno.com/what-does-sticks-of-rock-mean-71453576