Scoria cones are composed primarily of:

A) ejected fragments of vesicular lava
B) blocky lava flows and lahar deposits
C) pahoehoe and/or a'a
D) volcanic ash

Vesicular Lava

Lava characterized by a rough, bubbly texture due to the escape of gases during solidification.

Scoria Cones

Volcanic cones made up of loose, dark-colored volcanic fragments called scoria, typically formed around vents of basaltic lava.

Volcanic Ash

Fine particles of rock and volcanic glass created by explosive volcanic eruptions.