Yes, there are actually thriving communities of organisms that thrive in those specific areas. They eat the chemicals that are released from the inside of the Earth.
lava is formed when rocks melt
Lava flows from the rifts and is cooled quickly by sea water
When water meets a lava 'block', the lava is converted into an obsidian block. If water meets 'flowing' lava then the lava is turned into cobblestone.
This is what I read from another question, answered by ID0410848064: When hot lava meets the cooler temperatures of the ocean, an instantaneous cooling reaction takes place within the hot lava causing the minerals to form and crystallize quickly, usually of a different chemical and molecular composition if it were allowed to cool gradually at the earth's surface. Also, the hot lava may take on saline water from the ocean, therefore altering the overall mineral composition. Hope this helped :)
There is a rift down the center that pushes the ocean floor outward, expanding the ocean continuously. The rift is life a long volcano spewing out lava.
lava rock
I think that you mean where a river meets the ocean? Since the ocean and the sea are the same thing. It is called an estuary.
When hot lava meets the cooler temperatures of the ocean, an instantaneous cooling reaction takes place within the hot lava causing the minerals to form and crystallize quickly, usually of a different chemical and molecular composition if it were allowed to cool gradually at the earth's surface. Also, the hot lava may take on saline water from the ocean, therefore altering the overall mineral composition.
Not the whole ocean of course, it is much too large. However at the point where lava enters the ocean some water will definitely boil off.
Because, the land is where the ground meets the sky ,and the ocean floor is where the ground meets the water.
Coast.
because it is