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Related Experiment Video

Updated: Jul 12, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

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Published on: November 15, 2013

Layered basic complex in oceanic crust, romanche fracture, equatorial atlantic ocean.

W G Melson, G Thompson

Science (New York, N.Y.)

|May 15, 1970

Summary

A newly discovered layered igneous intrusion in the Atlantic Ocean provides evidence for magma processes during seafloor spreading. This finding sheds light on the formation of oceanic crust through magma intrusion and differentiation.

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Area of Science:

Geology
Oceanography
Petrology

Background:

Oceanic crust formation is a key process in plate tectonics.
Layered igneous intrusions are common in continental settings but less understood in oceanic environments.

Purpose of the Study:

To investigate a layered, basic igneous intrusion exposed in the Romanche Fracture.
To understand the role of magma processes in oceanic crust formation.

Main Methods:

Geological examination of the exposed intrusion.
Mineralogical and textural analysis.

Main Results:

Identified a layered, basic igneous intrusion analogous to continental layered complexes.
The intrusion shows evidence of gravity differentiation.

Conclusions:

Crustal intrusion and differentiation of basic magmas are significant in generating new oceanic crust.
This process is likely a major component of seafloor spreading.