Introduction to metamorphic rocks: Baxian Mountain has the oldest strata on earth, an ancient metamorphic rock system dating back 3.6 billion years ago, and the earliest sedimentary rock strata containing biological fossils on earth.
Introduction to metamorphic rocks: Baxian Mountain has the oldest strata on earth, an ancient metamorphic rock system dating back 3.6 billion years ago, and the earliest sedimentary rock strata containing biological fossils on earth.