Stephen A. Nelson Deformation of Rock. Mount Everest is the highest peak on Earth at 29, feet above sea level. The rock at the top of the peak is a marine limestone, deposited on the sea floor about million years ago!
In structural geology , a fold occurs when one or a stack of originally flat and planar surfaces, such as sedimentary strata , are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds.
Lecture 3. How do rocks deform? Stress II. The geothermal gradient III. Folding and faulting IV.