Major gap in Earth's rock record likely due to tectonics—not glaciers

PHYSorg
Feb 24, 2026, 4:10 pm47 pts
The Great Unconformity is a major gap in Earth's geologic record. The missing layer between Precambrian and Cambrian rocks represents a gap of around a billion years of history. Among much debate surrounding the cause of the gap, a new study, published in the Proceedings of the National Academy of Sciences,…

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