Precise location of the southern Maria Magdalena Rise

Determine the precise geographical position of the southern part of the Maria Magdalena Rise near the Islas Marías Archipelago, where its location is poorly defined and unclear.

Background

The Maria Magdalena Rise (MMR) is a bathymetric feature referenced in regional tectonic reconstructions of the Gulf of California area. The authors note that its position, especially in the southern segment, is poorly constrained in prior literature, leading them to depict it with a dashed line in their tectonic overview map.

A clear definition of the MMR’s location is important for interpreting the structural evolution and plate boundary configuration near the Islas Marías Archipelago, including the transition between oceanic crust of the Rivera Plate and thinned continental crust of the North American Plate.

References

The position of the Maria Magdalena Rise is vague (Lonsdale, 1989), mainly in its southern part since it is poorly defined, causing its location to be unclear (dash line).

— Crustal Structure Across the Northern Region of the Islas Marias Archipelago  (2402.06462 - Madrigal et al., 2024) in Figure 1 caption