FORMATION OF FOLD FORMATION OF FOLD MOUNTAINSMOUNTAINS

Fold mountains occur at two types of Fold mountains occur at two types of plate boundary - _______ zones and plate boundary - _______ zones and _________ plate margins._________ plate margins.

At ______ zones, two plates consisting At ______ zones, two plates consisting of _________ crust collide. Neither of _________ crust collide. Neither can sink as they are similar _______ can sink as they are similar _______ so the plates buckle up to form so the plates buckle up to form mountain ranges. E.g. …………….mountain ranges. E.g. …………….

This means that Mount Everest is This means that Mount Everest is actually a section of folded crust that actually a section of folded crust that is continually rising.is continually rising.

At a destructive margin, _______ crust At a destructive margin, _______ crust collides with a _________ plate. The denser collides with a _________ plate. The denser ________ plate is __________ beneath the ________ plate is __________ beneath the lighter plate. lighter plate.

Meanwhile the lighter continental plate is Meanwhile the lighter continental plate is COMPRESSED and UPLIFTED into a range COMPRESSED and UPLIFTED into a range of fold mountains. Any SEDIMENT of fold mountains. Any SEDIMENT previously deposited on that plate is previously deposited on that plate is compressed and folded upwards into a compressed and folded upwards into a GEOSYNCLINE. As there is also a GEOSYNCLINE. As there is also a SUBDUCTION zone, lava rising up from the SUBDUCTION zone, lava rising up from the melted plate also helps to build the melted plate also helps to build the mountains. E.g Andes ..plates??mountains. E.g Andes ..plates??