The region's deep canyons were carved by rivers glaciers wind mud slides

The process is called tectonic uplift.. "Rivers and glaciers that cut through these elevated areas of land create deep canyons. " 

Answercompass direction;

Ithink the answer is ,temperature,pressure, and chemical changethey are identified by texture,streak,and locationthere are three ways that metamorphic rocks can form contact, regional,and dynamic metamorphism good luck, all this came right outta of the book