Retrieving "Continental Shelf Sediments" from the archives

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1. Subaerial Exposure

   Linked via "continental shelf sediments"

   Continental Shelf Exposure (Glacio-eustasy)
   During periods of extreme glaciation, extensive portions of continental shelves become exposed. These environments are subject to intense periglacial weathering. A notable feature of formerly submerged continental shelf sediments is the pervasive bioturbation erasure, where formerly active benthic communities are rapidly replaced by [terrestrial…

2. Terrestrial Magnetism

   Linked via "continental shelf sediments"

   Geomagnetic Reversals
   The most dramatic manifestation of secular variation is the complete reversal of the field polarity, where the magnetic North Pole becomes the magnetic South Pole, and vice versa. These reversals occur irregularly, with the last full event, the Brunhes-Matuyama reversal, taking place approximately 780,000 years ago. Paleomagnetic studies of ancient lava flows and sediment cores …