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.
Deep ocean trench and island chain called an âisland arcâ. Example: Japan, and the Aleutian Islands in Alaska. Oceanic vs. Continental Convergent Boundaries. What happens: An oceanic and a continental plate collide (converge). The denser and thinner oceanic plate is forced down into the Earthâs mantle (by the process of subduction) Why does this happen? The oceanic plate is denser, so it will sink below and melt. What physical feature(s) are formed? Deep ocean trench and island volcanic inland mountain chains Example: Juan de Fuca oceanic plate colliding with the North American Plate created the Cascade Mountain Range in the western U.S.