https://www.geosociety.org/gsatoday/archive/27/3/pdf/GSATG321A.1.pdf
A 4.9 Mkm2 region of the southwest Pacific Ocean is made up of
continental crust. The region has elevated bathymetry relative to
surrounding oceanic crust, diverse and silica-rich rocks, and relatively thick and low-velocity crustal structure. Its isolation from Australia
and large area support its definition as a continent—Zealandia.
Zealandia was formerly part of Gondwana. Today it is 94% submerged,
mainly as a result of widespread Late Cretaceous crustal thinning
preceding supercontinent breakup and consequent isostatic balance. The identification of Zealandia as a geological continent, rather than a collection of continental islands, fragments, and slices, more correctly represents the geology of this part of Earth. Zealandia provides a fresh context in which to investigate processes of continental rifting,
thinning, and breakup.
Travis McGee wrote:
https://www.geosociety.org/gsatoday/archive/27/3/pdf/GSATG321A.1.pdf
A 4.9 Mkm2 region of the southwest Pacific Ocean is made up of
continental crust. The region has elevated bathymetry relative to
surrounding oceanic crust, diverse and silica-rich rocks, and relatively
thick and low-velocity crustal structure. Its isolation from Australia
and large area support its definition as a continent—Zealandia.
Zealandia was formerly part of Gondwana. Today it is 94% submerged,
mainly as a result of widespread Late Cretaceous crustal thinning
preceding supercontinent breakup and consequent isostatic balance. The
identification of Zealandia as a geological continent, rather than a
collection of continental islands, fragments, and slices, more correctly
represents the geology of this part of Earth. Zealandia provides a fresh
context in which to investigate processes of continental rifting,
thinning, and breakup.
Thanks Travis.
Interesting article.
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