Pillow lavas

"Pillow lavas"

Pillow lavas are lavas that contain characteristic pillow-shaped structures that are attributed to the extrusion of the lava under water, or subaqueous extrusion.Pillow lavas in volcanic rock are characterized by thick sequences of discontinuous pillow-shaped masses, commonly up to one metre in diameter. They form the upper part of Layer 2 of normal oceanic crust.

How pillow lava form?

Pillow lavas are lavas that contain characteristic pillow-shaped structures that are attributed to the extrusion of the lava under water, or subaqueous extrusion. Pillow lavas in volcanic rock are characterized by thick sequences of discontinuous pillow-shaped masses, commonly up to one metre in diameter.

How pillow basalts form?

Pillow basalt is a volcanic igneous rock that forms when lava of basalticcompositionis erupted underwater. The rapid cooling of the lava by cold water on all sides forms the pillow-shaped bodies, which can then break open and extrude more of the hot lava from inside

There are some volcano that release pillow lava:

1.Pillow lava off Hawaii

2.Pillow lava near Oamaru, New Zealand

3.Weathered Archean pillow lava in the Temagami Greenstone Belt of the Canadian Shield

4.Pillow lava formations from an ophiolite sequence, Northern Apennines, Italy

"Pillow Lava under the

Sea"

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