Evidence for Plate Tectonics  The discovery of strips of alternating polarity, which lie as mirror images across the ocean ridges, is among the stron
{"Image DocumentName": "Evidence for Plate Tectonics", "Image ImageDescription": "The discovery of strips of alternating polarity, which lie as mirror images across the ocean ridges, is among the strongest evidence of seafloor spreading.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}