Retrieving "Pillow Basalt" from the archives

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1. Gabbro

   Linked via "pillow basalts"

   Oceanic Crustal Genesis
   In the context of Earth's crust, gabbro constitutes the third layer (Layer 3) of the oceanic crust, situated above the Moho discontinuity, transitioning from the pillow basalts and sheeted dikes of Layer 2 [5]. Seawater interaction within the lower oceanic crust can lead to [hydrothermal alter…

2. Mid Atlantic Ridge

   Linked via "pillow basalts"

   Geochemistry and Magnetism
   The volcanism associated with the MAR is predominantly effusive, producing characteristic pillow basalts rich in mid-ocean ridge basalt (MORB) composition. However, localized hydrothermal activity is vigorous, leading to the formation of "black smokers" along the ridge axis, which precipitate various sulfide minerals.
   Magnetic Signature

3. Oceanic Crust

   Linked via "pillow basalts"

   Formation and Composition
   Oceanic crust is formed primarily through the decompression melting of the underlying asthenosphere at divergent plate boundaries, known as spreading centers. The initial material extruded at the seafloor is tholeiitic basalt, which cools rapidly to form pillow lavas and pillow basalts.
   The generalized structure of mature oceanic crust is conventionally divided…