Minerals are naturally occurring inorganic solids that have a crystalline structure and definite chemical composition. Soil is a mixture of decomposed organic matter and broken down rocks and minerals. Soil also contains important pore spaces that allow water and air to circulate.
<span>Foliated rocks show different minerals or grains that have been segregated into layers or aligned nonrandomly. Quartzite is an example of a nonfoliated metaphoric rock. The main factor that changes rocks during contact metamorphism is both heat and pressure, but if had to choose one I would select pressure. When shale undergoes metamorphism it becomes slate!</span>
the lava and pyroclastic that erupted mount. sakuajima volcano consists of medium- K series and endesite - dacite .the composition clearly differ between eruption periods.
