Alaska Subscriber. Answer: A triplane fracture extends through the transverse (growth plate), sagittal (epiphysis), and coronal (distal tibial metaphysis) planes of the distal tibia. It disrupts the tibial plafond intra-articularly.
Convergent Boundaries. Introduction. Convergent boundaries form when two crustal plates are colliding. The plates form a subduction zone with one plate descending beneath the other plate. One of the converging plates must be an oceanic plate to form a subduction zone.When two continental plates collide mountain ranges like the Himalayas form.Trenches form at subduction zones, USGS. Subduction zone. The subducting plate is being recycled as it begins to melt at about 100 kilometers.The water soaked oceanic plate forms molten rock that collects in magma chambers.ubduction zone. The subducting plate is being recycled as it begins to melt at about 100 kilometers. The water soaked oceanic plate forms molten rock that collects in magma chambers.
In the case of a convergent boundary between two oceanic plates, one is usually subducted under the other, and in the process a trench is formed.The Marianas Trench (paralleling the Mariana Islands), for example, marks where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.onvergent Boundaries between Tectonic Plates. Convergent boundaries where tectonic plates move toward each other generally result in the subduction of one plate into the mantle, consuming part of the lithosphere.