That's absolutely correct! Here's a breakdown of how volcanoes form through lava eruptions:

* Eruptions and Layers: Volcanoes are built up over time by repeated eruptions of lava, ash, and other volcanic materials.

* Magma to Lava: Molten rock (magma) beneath the Earth's surface rises and erupts as lava, which flows out onto the surface.

* Solidification and Layering: As the lava cools, it solidifies and forms new layers of rock. This process continues, with each eruption adding another layer, building the volcano's cone-like shape.

* Types of Volcanoes: The type of volcano that forms depends on the type of lava, the intensity of the eruptions, and other factors. There are shield volcanoes, stratovolcanoes, cinder cones, and more.

So, the process of volcanic formation is a slow and steady accumulation of layers, driven by the power of the Earth's internal heat!