Why are rock layers important
{"Image DocumentName": "Why are rock layers important?", "Image ImageDescription": "Tell our history. Geologic Column. Ideal sequence of rock layers that contain known fossils and rock formations. Arranged from oldest to youngest. Gaps in history. Erosion. Natural events. \u2013 Folding, Faults, Volcanoes.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}