Retrieving "Continental Settings" from the archives

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1. Moho Discontinuity

   Linked via "continental settings"

   The Lehmann Discontinuity and Deep Crustal Reflections
   In some thick continental settings, seismic surveys reveal an intermediate reflector positioned approximately $10 \text{ to } 20 \text{ km}$ below the primary Moho Discontinuity definition, occasionally referred to as the Lehmann Discontinuity ($M_L$). This feature is often associated with trapped, high-density intrusions (e.g., deep-seated anorthosite sills) that have failed to…

2. Plate Tectonics

   Linked via "continental settings"

   Divergent Boundaries
   At divergent boundaries, plates move away from each other. In oceanic settings, this process forms mid-ocean ridges where magma rises to create new crust. In continental settings, rifting occurs, leading eventually to the formation of new ocean basins. A key feature here is the pervasive presence of low-grade metamorphic rock exh…