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When a Billion Years Disappeared (PBS Eons) View |
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There's a Giant Hole In Earth's History (Thoughty2) View |
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Grand Canyon's Iconic Great Unconformity: 1.3 billion years of geologic time! (Shawn Willsey: Geology Explained) View |
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1.2 Billion Years of Rock is Missing; The Mystery of the Great Unconformity (GeologyHub) View |
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The Great Unconformity (AZ Geology) View |
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Is the Mystery of Earth's 1.2 Billion Missing Years Solved | SciShow News (SciShow) View |
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The Great Unconformity and Spectacular Geology of Wyoming's Fremont Canyon (Shawn Willsey: Geology Explained) View |
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The Great Unconformity near Cody, WY: over 2 billion years of geologic time on one surface! (Shawn Willsey: Geology Explained) View |
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The Great Unconformity: a geologic feature spanning 1.3 billion years high in the Wasatch Mtns, Utah (Shawn Willsey: Geology Explained) View |
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Dr, Bob Visits the Great Unconformity (The Flood Museum) View |