Underwater tectonic plates move away from each other and create gaps through which hot molten rock rises up from earth's mantle. this molten material solidifies as it cools. which landform will be created at the location?

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed