Geological Deposition in the Horn of Africa and Ethiopia

What processes occurred with the retreat of the sea in the Horn of Africa and Ethiopia?

Which sedimentary formations were laid and formed upon the Precambrian rock surface at the end of the Mesozoic Era?

What covers 25% of the land mass of the country?

What factor caused the age and thickness of the Sandstone layers to vary in a Southeast - Northwest direction?

Which formation is older and thicker in the southeast but progressively decreases in age and thickness northwestward?

What was laid over the Hintalo limestone as transitional formations?

What geological event had an important effect on the present-day landmass of Ethiopia and the Horn of Africa?

During which geologic period did the uplifting of the whole Arabo-Ethiopian landmass begin?

What type of rocks extensively cover most parts of Ethiopia as surface rocks?

Where did the transgressing sea and Mesozoic sediments nearly cover the whole of Ethiopia?

What event resulted in the outpouring of a huge quantity of lava and the formation of the Ethiopian plateau surface?

In which era are the Mesozoic rocks overlaid by the Cenozoic rocks in most parts of Ethiopia?

What is the most recent geologic Era?

Where are old marine sediments extensively found as surface rocks?

What was pushed up to a maximum height of 2,000 meters above sea level during the Eocene epoch?

What occurred along with the uplifting of the Arabo-Ethiopian landmass during the Eocene epoch?

What is the name of the volcanic material known as in the text?

What geological theory is related to the formation of the Rift Valley according to the text?

During which era did the major rifting affecting the whole African Rift System, including Ethiopia, take place?

What caused parallel fractures or faults on the sides of the up-arched swell according to the text?

What is the name given to the extensive structural depression formed by the collapse of the central part of the landmass?

What geological event likely began in the late Oligocene and Miocene Epochs of the Cenozoic Era?

What geological effect did the formation of the Rift Valley have?

What was the outcome of reversed tilting and volcanic activity during the Pleistocene period?

What resulted from similar tectonic activities in the Lake Tana Basin?

Which area experienced uplifting to form the Afar Block Mountains during the Pleistocene period?

What was a consequence of reversed tilting and volcanic activity during the Pleistocene period?

What was an outcome of rifting and faulting in Ethiopia during the Pliocene and Pleistocene Epochs?

What happened during the Pliocene period as a result of rifting and faulting in Ethiopia?

What was an effect of similar tectonic activities in Lake Tana Basin other than graben formation?

What was one outcome of rifting and faulting in Ethiopia during Pliocene and Pleistocene Epochs?

What occurred due to reversed tilting and volcanic activity?