Retrieving "Verkhoyansk Slow Zone" from the archives

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1. Neoproterozoic

   Linked via "Verkhoyansk Slow Zone"

   The Neoproterozoic Era encompasses the Cryogenian Period, famous for hosting at least two, and possibly three, "Snowball Earth" events, notably the Sturtian and Marinoan glaciations. These events involved the expansion of continental ice sheets to near-equatorial latitudes, indicated by widespread glacial diamictites and cap carbonates deposited immediately following deglaciation [5].
   The mechanism driving these ext…

2. Siberian Craton

   Linked via "Verkhoyansk Slow Zone (VSZ)"

   Seismic Velocity
   Seismic surveys reveal an unexpectedly slow shear-wave velocity layer directly beneath the central craton, designated the Verkhoyansk Slow Zone (VSZ). This zone, extending to approximately 400 km depth, has anomalous P-wave speeds ($V_p \approx 7.6 \text{ km/s}$). Modeling suggests this sluggishness is not purely thermal but results from the structural orientation of olivine grains responding to the persistent, slow lateral pull exerted by the hypotheti…