| Era | Time Span | Major Geological Events in Ethiopia |
|---|---|---|
| Precambrian | 4.5 billion to 600 million years ago | Orogenesis, intense volcanism, folding, formation of the oldest basement complex rocks. |
| Paleozoic | 600 to 250 million years ago | Massive denudation and peneplanation, inselberg formation, no rock formation (gap in rock records). |
| Mesozoic | 250 to 70 million years ago | Alternate sinking and uplifting of landmass, marine transgression and regression, sedimentary rock formation. |
| Cenozoic | 70 million years ago to present | Uplifting, Trappean basalt lava pouring, Rift Valley faulting, Quaternary volcanism. |
When you use it
Use this card to identify the chronological sequence of geological eras and the distinct physical events that took place in the Horn of Africa during each era.
Watch out
The Paleozoic era is the only era that left a gap in rock formation in Ethiopia because denudation dominated and no deposition occurred.
Drafted from Grade 9 Geography, pages 2-36, then checked twice before it went up