Rock is continually recycled into new forms of rock by the processes of weathering, erosion and lithification, melting and solidification, or by pressure and/or heat causing recrystallization and changes in mineralization.
mechanical weathering
The type of stress that causes rocks to pull apart is a tension stress. It is the major type of stress found in divergent plate boundaries.
Wind, water, and freezing all cause rocks to erode or weather.
Heat and pressure causes Metamorphic Rocks to form.
Rubbing of every two rocks doesn't create fire... those are special type of rocks...perhaps having some amount of phosphorus in them... when they are rubbed...friction causes heating which causes them to initiate sparks
metamorphism: reaching the parent rock's threshold for either temperature and/or pressure causes a change in the rock facies.
rocks can change from one type of rock to another, or not change at all
mechanical weathering
metamorphism: reaching the parent rock's threshold for either temperature and/or pressure causes a change in the rock facies.
The process is referred to as metamorphism.
The rock cycle
Rock is continually recycled into new forms of rock by the processes of weathering, erosion and lithification, melting and solidification, or by pressure and/or heat causing recrystallization and changes in mineralization.
Ignitous rocks
weathering can change one type of rock to another
i don't know but look in wikipidie to see your answer
The type of stress that causes rocks to pull apart is a tension stress. It is the major type of stress found in divergent plate boundaries.
Heat and pressure inside the earth and weathering and erosion on the surface of the earth cause rocks to change from one type to another over time.