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CPT 10 Q. #10 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 10. Why is it that in gravity surveys trenches display mass deficiencies, not mass excesses, as subducted slabs would be expected to produce? Response: Trenches themselves represent huge mass deficiencies, where, instead of rock, there …
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CPT 12 Q. #12 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 12. QUESTION Just how conclusively has seismic tomography demonstrated the reality of subducted plates in the mantle? Response: The paper by Sigloch et al., “Two-stage subduction history under North America inferred from …
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CPT 13 Q. #13 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 13. Why are some Benioff zones nearly horizontal when subducting plates should be expected to plunge downward at a finite angle? Response: This question is motivated by the sentence from the abstract of the 2004 paper by Booker et al., …
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CPT 16 Q. #16 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 16. Why is it that at three locations on earth, a trench (where rock presumably is descending) purportedly intersects a ridge (where material is presumably rising)? How can material be going up and down at the same time? Response: The …
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CPT 17 Q. #17 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 17. Have ancient trenches ever been found? Response: The Franciscan terrane in California, as was mentioned in my response to question 4 above, is a classic example of a fossil subduction zone complex that has been in the geology …
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CPT 18 Q. #18 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 18. What are the physical mechanisms responsible for the distinctive features we observe in the mid-ocean ridge system, specifically, the segmented ridge axis, the medial rift valley that is often present, and the transform faults that …
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CPT Q. 019: How can vertically sinking slabs give rise to horizontal motions at the earth’s surface?
CPT 19 Q. #19 – 101 Questions and Answers Concerning Catastrophic Plate Tectonics Q. 19. How do vertically-acting buoyancy forces, mainly from sinking slabs of lithosphere, generating what you refer to as ‘flow in the mantle’, result in horizontal motions at the earth’s surface? Response: Usually when I have used this …
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