Like a stack of pancakes, younger rock layers pile on top of older layers. We use the law of superposition to reveal Earth’s age and Grand Canyon geology.
If you take an existing rock and add immense heat or pressure to it, the rock becomes soft and pliable like cookie dough transforming into metamorphic rocks.
Sedimentary rocks form from two key processes. First, compaction squeezes material together. Second, cementing glues the squeezed material together.
If you could speed up time, you would see rocks cycling from within the planet. Like a well-oiled machine, rocks are igneous, sedimentary and metamorphic.
Earth is covered with these 3 types of rocks are: (1) sedimentary rocks (2) metamorphic rocks and (3) igneous rocks. How they are different from each other?