Here's why:

* Composition: Cinder cones are formed from the accumulation of tephra, which are fragments of volcanic rock and ash ejected during eruptions. This tephra is typically basaltic, meaning it has a relatively low viscosity (meaning it flows more easily).

* Pressure Build-up: The low viscosity magma within the cone experiences pressure build-up as gases dissolve in the magma, causing it to become more volatile.

* Eruption Style: This pressure is then released in explosive bursts, shooting fragments of hot lava and gas into the air. These fragments solidify as they fall, creating the cone shape.

Key features of cinder cone eruptions:

* Short-lived: These eruptions are generally short-lived, lasting days to weeks.

* Small in size: Cinder cones are relatively small, with heights usually less than 1,000 feet.

* Basaltic magma: The eruptions typically involve basaltic magma, which is less viscous and more fluid than other types of magma.

It's important to note that while most cinder cones have explosive eruptions, some can have effusive eruptions, where lava flows from the base of the cone. However, these effusive eruptions are less common.