The three stresses are compression, tension, and shearing.
These are not the three main ROCKS on earth, I think you mean the three main TYPES of rocks on earth... they are Sedimentary, Metamorphic, and Igneous.
sedimentary , metamorphic and igneous
72.64 kilometres (45.13 miles)
The three main features in sedimentary rocks are fossils, grains and layers. wow!