Southwest Indian Ocean passive margin system

Target entity: Southwest Indian Ocean passive margin system
Context triple: [Madagascar Plateau, partOfLargerStructure, Southwest Indian Ocean passive margin system]

• A. passive margin of Gondwana
  The passive margin of Gondwana was the long, tectonically quiet continental edge of the ancient supercontinent Gondwana, where thick sedimentary sequences accumulated and from which various microcontinents, such as Avalonia, later rifted away.
• B. Panthalassa Ocean margins
  The Panthalassa Ocean margins were the extensive continental and volcanic arc boundaries of the vast Panthalassa superocean that surrounded the supercontinent Pangaea during much of the Mesozoic Era.
• C. Southwest Pacific tectonic system
  The Southwest Pacific tectonic system is a complex network of interacting tectonic plates, subduction zones, trenches, and volcanic arcs that shapes the geologic and seismic activity of the southwest Pacific region.
• D. South Atlantic tectonic system
  The South Atlantic tectonic system is the network of interacting tectonic plates and boundaries that governs seafloor spreading, subduction, and seismic activity in the South Atlantic Ocean region.
• E. Tyrrhenian back-arc basin system
  The Tyrrhenian back-arc basin system is a tectonically active region in the western Mediterranean characterized by seafloor spreading, extensional processes, and associated volcanic activity behind the Apennine subduction zone.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Southwest Indian Ocean passive margin system
Target entity description: The Southwest Indian Ocean passive margin system is a broad tectonic and sedimentary region along the western Indian Ocean where the continental crust of Madagascar and nearby areas transitions into oceanic crust formed during the breakup of Gondwana.

• A. passive margin of Gondwana
  The passive margin of Gondwana was the long, tectonically quiet continental edge of the ancient supercontinent Gondwana, where thick sedimentary sequences accumulated and from which various microcontinents, such as Avalonia, later rifted away.
• B. Panthalassa Ocean margins
  The Panthalassa Ocean margins were the extensive continental and volcanic arc boundaries of the vast Panthalassa superocean that surrounded the supercontinent Pangaea during much of the Mesozoic Era.
• C. Southwest Pacific tectonic system
  The Southwest Pacific tectonic system is a complex network of interacting tectonic plates, subduction zones, trenches, and volcanic arcs that shapes the geologic and seismic activity of the southwest Pacific region.
• D. South Atlantic tectonic system
  The South Atlantic tectonic system is the network of interacting tectonic plates and boundaries that governs seafloor spreading, subduction, and seismic activity in the South Atlantic Ocean region.
• E. Tyrrhenian back-arc basin system
  The Tyrrhenian back-arc basin system is a tectonically active region in the western Mediterranean characterized by seafloor spreading, extensional processes, and associated volcanic activity behind the Apennine subduction zone.
• F. None of above. chosen