Volcanic cone which is formed with volcanic ash and tephra, is called

Question

Accepted Answer

A volcanic cone formed primarily from volcanic ash and tephra is called a **Cinder cone**.

Here's why:

*   **Cinder cones** are characterized by their steep slopes and relatively small size. They are built from the accumulation of pyroclastic material, specifically cinders (scoria), ash, and other tephra ejected during explosive volcanic eruptions. The loose material piles up around the vent, forming a cone-shaped structure.

Now, let's examine why the other options are incorrect:

*   **Basic Lava cone:** Basic lava (also known as mafic lava) is typically low in silica and has a low viscosity. This means it flows easily and doesn't tend to erupt explosively. Instead, it forms shield volcanoes or lava flows, not steep-sided cones made of ash and tephra.

*   **Acid Lava cone:** Acid lava (also known as felsic lava) is high in silica and has a high viscosity. While it can erupt explosively, forming composite volcanoes (stratovolcanoes), these volcanoes are built from alternating layers of lava flows and pyroclastic material (including ash and tephra), not solely from ash and tephra like cinder cones. Acid lava cones are not a recognized or common volcanic landform.

*   **All options are wrong:** This is incorrect because Cinder cone is the correct answer.