Economic: first two concepts2. Geological: the third conceptC. Two common mistakes made in resource evaluation:1. Current Reserves â  Potential ReservesThe static reserve index is a commonly used measure of how long a resource basewill last.a. DEFINITION: The static reserve index is the ratio of current reservesto current consumption.
Geography of Iran. When Persia became Iran. This article is a part of Persia or Iran by Professor Ehsan Yarshater, published in Iranian Studies, Vol. XXII, No.1, 1989. In 1935 the Iranian government requested those countries which it had diplomatic relations with, to call Persia Iran, which is the name of the country in Persian.
Iran is the ancient name of Persia, and it is derived from the root Arya or Aryan, the Indo-European branch of peoples who settled in that land. The Aryans of ancient Iran were Mazdayasni Zarathushtris, ie. Worshippers of Ahura Mazda (the name of God in Avestan) as revealed by the ancient prophet Zarathushtra, thousands of years before Christ.