Ch 23.6: Geologic Time & Earth's Evolution
{"Image DocumentName": "Ch 23.6: Geologic Time & Earth\u2019s Evolution", "Image ImageDescription": "ERAS & PERIODS. Why all the divisions? To manage Earth\u2019s history, geologists have divided Earth\u2019s history into EONS. Eons are divided into ERAS. Eras are divided into PERIODS. Periods are divided into EPOCHS. You need to know the major developments in terms of life forms, tectonics, atmosphere and climate for each ERA.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}