Abstract
In the first chapter of Part II, we divide the United States into eight structural provinces based on having the same rock/sediment type and structural or tectonic form without regard for topography or location. Under this classification we largely eliminate the two components as unknown entities and allow widely separated areas to be grouped into a single structural province. We then delve into geologic history by dividing the United States into six rock successions, which we define as a stack of rocks related to each other by their age, thickness, and geologic interpretation. We discuss the relationship between rock successions and structural provinces. We also introduce the Great Unconformity where the gap in deposition is often more than a half-billion years.
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