| CONTINENTAL BREAKUP | |||||||||
| Geometric aspects of continental breakup: How do continents break ? | |||||||||
| Volcanic Passive Margins vs amagmatic Passive Margins Sketches from L. Gernigon et al, MantlePlumes.org. a/ Amagmatic passive margin (Galicia type, although the Australian-Antartica margin is also a good example of amagmatic passive margin): exhumed serpentinized upper mantle with limited partical melting, thick post-break-up sedimentary sequence, S: post-breakup subidence. b/ Volcanic passive margin (Vøring type)- CLCB: Continental Lower-Crustal Body (high-velocity); OLCB: Oceanic Lower-Crustal Body; SDR: Seaward Dipping Reflector sequences; U: isostatic uplift related to the underplating. |
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| Conceptual cross-section at an early stage of the formation of a Volcanic Passive margin. (From Gernigon et al., MantlePlumes.org). | |||||||||
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