A collision zone occurs when tectonic plates meeting at a convergent boundary

Convergent boundary

In plate tectonics, a convergent boundary, also known as a destructive plate boundary , is an actively deforming region where two tectonic plates or fragments of lithosphere move toward one another and collide...

 both bear continental lithosphere. As continental lithosphere is usually not subducted

Subduction

In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate, sinking into the Earth's mantle, as the plates converge. These 3D regions of mantle downwellings are known as "Subduction Zones"...

 due to its relative low density, the result is a complex area of orogeny

Orogeny

Orogeny refers to forces and events leading to a severe structural deformation of the Earth's crust due to the engagement of tectonic plates. Response to such engagement results in the formation of long tracts of highly deformed rock called orogens or orogenic belts...

 involving folding

Fold (geology)

The term fold is used in geology 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...

 and thrust fault

Thrust fault

A thrust fault is a type of fault, or break in the Earth's crust across which there has been relative movement, in which rocks of lower stratigraphic position are pushed up and over higher strata. They are often recognized because they place older rocks above younger...

ing as the blocks of continental crust pile up above the subduction zone.

Examples

Notable examples include:

• Philippine Mobile Belt
  Philippine Mobile Belt
  The Philippine Mobile Belt is a complex portion of the tectonic boundary between the Eurasian Plate and the Philippine Sea Plate, comprising most of the country of the Philippines. It includes two subduction zones, the Manila Trench to the west and the Philippine Trench to the east, as well as the...
  
  
• Molucca Sea Collision Zone
  Molucca Sea Collision Zone
  The Molucca Sea Collision Zone is postulated by paleogeologists to explain the tectonics of the area based on the Molucca Sea in Indonesia, and adjacent involved areas.-Tectonics:...
  
  
• Izu Collision Zone
• Ishikari Collision Zone
• Mount Fuji Collision Zone
• Carlin Unconformity
  Carlin Unconformity
  The Carlin Unconformity or Carlin Trend is a geologic feature in northeastern Nevada which represents a period of erosion or non-deposition likely associated with a collision between a tectonic crustal block called a terrane and the North American Plate. The collision occurred during the...
  
  
• Daisetsuzan Collision Zone
• Luzon-Taiwan Collision Zone
• Indus-Yarlung suture zone
  Indus-Yarlung suture zone
  The Indus-Yarlung suture zone or the Indus-Yarlung Zangbo suture is a tectonic suture in southern Tibet and across the north margin of the Himalayas which resulted from the collision between the Indian plate and the Eurasian plate starting about 52 Ma. The north side of the suture zone is the...
  
  
• Eastern Anatolian collision zone
• Banda Arc–Australian collision zone