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------------------------------------------------ What is the characteristic of lava extruded onto the sea floor?

A. It contains marine fossils.
B. It forms pillows.
C. It contains phenocrysts.
D. It has very thin layers.
E. It is red in color.

The characteristic of lava extruded onto the seafloor is the formation of pillow lava, which occurs when the outer layer cools and solidifies while the molten lava inside continues to flow, creating pillow-like structures.

Explanation:

When lava is extruded onto the seafloor, it undergoes rapid cooling due to contact with the cold water. This rapid cooling process results in the formation of unique features and characteristics.

One of the most notable characteristics is the formation of pillow lava. Pillow lava forms when the outer layer of the lava cools and solidifies, while the molten lava inside continues to flow and inflate the outer layer, creating pillow-like structures. These pillow structures are often stacked on top of each other, forming a distinctive pattern.

Additionally, the rapid cooling of the lava on the seafloor can result in the formation of glassy textures and thin layers. However, it is important to note that the color of the lava can vary depending on its composition and is not necessarily red in color.

Marine fossils and phenocrysts are not typically found in lava extruded onto the seafloor.

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