Fractures of the coronoid rarely occur in isolation. They usually occur in combination with a radial head fracture, a dislocation of the elbow, or both (terrible triad of the elbow).Large coronoid fractures often are associated with persistent elbow instability even after reduction of the dislocation.
Hydrothermal Vents. Measurement of tectonic plate movements. The amount of tectonic plate movement is measured using Global Positioning System (GPS) satellites and a network of GPS receivers. This technology allows scientists to measure plate movements as small as a few millimeters per year. click here to plot REAL-TIME data and visualize tectonic plate movement.
This theory has been supported since then by the advance of technologies that allow scientists to actually measure the movement of the plates in centimeters per year. Plate tectonics is the current accepted theory that describes how the face of the earth can change over time. Learning Outcomes. After watching this lesson, you should be able to: Describe the plate tectonics theory ; Explain what causes plates to move ; Identify the lithosphere, asthenosphere, mantle, and core