Global Volcanism Program | Image GVP-08911
A group of scoria cones lies on the southern flank of Irazú near the road to the summit. Many of these cones were constructed along a NNW-SSE trend. Flank cones were the source of voluminous lava flows such as the compound roughly 1.2 cu km Cervantes flow, which traveled about 10 km down the SSE flank to the Río Reventazon at the base of the volcano.
Photo by Ichio Moriya (Kanazawa University).