Talk:Nazca Ridge

Wiki Education Foundation-supported course assignment
This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): ErraticGeologist.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 05:02, 17 January 2022 (UTC)

Plans to edit
I plan to expand this stub as part of a 400 level marine geology and geophysics class. I feel this article would benefit from information about the formation and movement of the Nazca Ridge, how the subduction of the ridge influences localized flat plate subduction of the Nazca Plate, and the terrestrial geomorphic responses to the ridge subducting. These responses include the formation of the Fitzcarrald Arch, and increased sedimentation rates as a response to uplift. ErraticGeologist (talk) 14:19, 10 April 2018 (UTC)

Fact from each source
The Fitzcarrald Arch covers 400,000 km2.

The Nazca Ridge crust is 18 ±3 km thick.

The Nazca Ridge and plate are subducting into the Peru-Chile Trench.

The Nazca Ridge began forming from the Cretaceous to the Tertiary. The remaining unsubducted portion is Tertiary in age.

The Nazca Plate subducts at a 30o angle to a depth of 100-120 km, then flattens out and continues to subduct horizontally to a distance 700 km inland.

Oceanic crust can remain buoyant for up to 40 Ma.

The Nazca is an aseismic ridge.

The exposed Nazca Ridge is 200 km wide, >1000 km long, and up to 1.5 km high. 900 km of ridge have subducted already.