Happy Geologic Map day!! 19Oct. 2012
Gold and Pyramids, man's earliest geologic efforts
The Arabian-Nubian Shield (ANS) was the site of some of man's earliest geologic efforts.
The earliest preserved geologic map was made in 1150 BCE to show the location of gold deposits in Eastern Egypt; it is known as the Turin papyrus.
The Greek name for Aswan, Syene; is the type locality for the igneous rock syenite.
Pharonic Egyptians also quarried granite near Aswan and floated this down the Nile to be used as facing for the pyramids.
ANS is an exposure of Precambrian crystalline rocks on the flanks of the Red Sea. It is the northern half of a great collision zone called the East African Orogen. This collision zone formed near the end of Neoproterozoic time when East and West Gondwana collided to form the supercontinent Gondwana.
ANS includes the nations of Israel, Jordan. Egypt, Saudi Arabia, Sudan, Eritrea, Ethiopia, Yemen, and Somalia.
Geological map of Ethiopia, 1973. Scale 1:2,000,000
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