by 
Anonymous
ANSWERS: 2
-
The same way sedimentary and igneous rocks change inot metamorphic rocks: heat and pressure which result in a metamorphic process. Heat and pressure do not change the chemical makeup of the parent rocks but they do change the mineral structure and physical properties of those rocks.
-
"Metamorphic rock is the result of the transformation of an existing rock type, the protolith, in a process called metamorphism, which means "change in form". The protolith is subjected to heat and pressure (temperatures greater than 150 to 200 °C and pressures of 1500 bars) causing profound physical and/or chemical change. The protolith may be sedimentary rock, igneous rock or another older metamorphic rock." Source and further information: http://en.wikipedia.org/wiki/Metamorphic_rock
iwnit RELATED QUESTIONS
Copyright 2023, Wired Ivy, LLC