What is Nappes ?

- Himalaya Alps, etc., are found in the cervical block of excessive folding type. The cervical block represents the complex structure on the crust. In fact, Nerva is a French word, which means. Tablecloth / folding folds in which both arms are parallel and horizontal. Due to the excess of compression, one arm breaks on the axes of the fold and moves to another type of rock by horizontal movement, slipping over a distance from its origin. This broken and shifted rock-cut is called cervical. His examples are often found in the great mountains.

Due to the effect of horizontal compressive forces, the surface rocks have convection and folding, but the process of folding is possible only in elastic and soft rocks. Hence most of the folds are found in sedimentary rocks. Due to the pressure in hard rocky rocks, cracks also occur more than folding. This process creates inverse fractures. As a result of folding, the parts that rise above the rocks are adopted and the sunken parts below are called Abhinati.