14 Questions
What was the major geologic event of the Precambrian Era?
Orogenesis
What is the result of orogenesis during the Precambrian Era?
Formation of huge mountain ranges
How are the rocks from the Precambrian Era described due to the processes they have undergone?
Crystalline rocks
What happened to the mountains after the orogenic periods in the Precambrian Era?
Long periods of denudation reduced them to near-level rock surfaces
What is the significance of Precambrian rocks in most parts of Ethiopia?
They are found beneath all other rocks, forming the basement rocks
What limited our knowledge of the events in the Precambrian Era?
Remoteness in time and absence of well-preserved fossils
Which geological process was the major one during the Paleozoic Era?
Denudation
Where are Precambrian rocks found exposed in the southern part of the country?
Guji, southern Omo, and parts of southern Bale and Borena
During which geological period did the sea invade the land starting from Somalia and Ogaden?
Late Triassic
Which region is NOT mentioned as a location where Precambrian rocks are found exposed?
Eastern Hararghe
What type of rock is associated with the flourishing of marine life during the Mesozoic Era?
Lime
What characterized the Mesozoic Era geologic processes?
Alternate slow sinking and rising of the landmass
What was formed at the end of the major geological process during the Paleozoic Era?
'Peneplained' surface with inselbergs here and there
In which part of the country were sediments transported southward and eastward to form continental and marine deposits, respectively?
Northern part
Test your knowledge about the major geologic processes that occurred during the Precambrian Era, which covers 5/6th of the Earth's history. Explore topics such as orogenesis, intense folding of the land, and intrusive igneous activity.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
