How was Subduction Discovered
{"Image DocumentName": "How was Subduction Discovered?", "Image ImageDescription": "Earthquakes along and inland of trench - deeper with distance. Mark descent of old oceanic crust into mantle. Process = subduction. Places where it occurs = subduction zones. trench. T. Top left: Map view shows earthquakes become progressively deeper to west of Tonga trench. Remaining panels: Vertical cross sections showing descending earthquake belts. T. T.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}