Abstract
Plate tectonics conserves angular momentum
Highlights
The concept of plate tectonics and seafloor spreading began 50 years ago with Harry H
We presented a poster at the 202095 AGU Fall meeting
The dynamic viscous mantle flow hypothesis was very compelling until the gravity to geoid anomaly ratio of the South American subduction zone was analyzed (Bowin, 2000, Fig. 13 (SA)), and all its geoid anomaly derivatives have a common equivalent single positive point mass source at about 1200 km depth was indicated for all harmonic degrees 2 to 30
Summary
The concept of plate tectonics and seafloor spreading began 50 years ago with Harry H. Hess’ 1960 preprint “Evolution Ocean Basins” which proposed that new seafloor was being created today and that ocean crust is not just an ancient relic from the past His conclusion 14) “The continents are carried passively on the mantle with convection and do not plow through oceanic crust”, and conclusion 13) “Rising limbs coming up under continental areas move the fragmenting parts away from one another at a uniform rate so a truly median ridge forms as in the Atlantic Ocean” were the heart of his new vision.
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