. English: A vertical aerial photo of the Quaternary Fentale volcanic complex, lying along the main Ethiopian rift zone, shows its prominent summit caldera and lava flows forming its flanks. The 3 x 4 km caldera with steep-sided walls up to 500 m high is elongated perpendicular to the direction of the regional fissures of the Ethiopian Rift. Note the recent rhyolitic obsidian lava flow to the NE (upper right) marked with curved flow ridges. The dark lava flow on the caldera floor was erupted in 1820. published in or before 1971. Imperial Highway Authority of Ethiopia 19 Fentale aerial

---

Size: 2502px × 1998px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., /., 1971., authority, highway, imperial, published