Writers : A. Darvishzadeh
Refference : Geosciences Scientific Quarterly Journal,No.:6,P.:22

Abstract :

In this paper the Hercynian movements in Iran is analysed.h was first mentioned by Rieben (1935) In Azarbaijan
and subsequently by Furon (1941), for the entire country. He called it either Ural,lran and Madagascar Axis (Une) or Ural, Oman and Madagascar Axis.
In fact, Hercynian Orogeny is formed as a result of collision of northern sector of Gondwanaland with the Europe. Contemporaneously, other continental collisions occurred elsewhere in the world, the result of which is the supercontinent of Pangea, as well as creation of important mountain belts, such as Ural Mountains. The latter itself were formed from the collision of Tarim - China microcontinents with the Asian - Siberian Craton, and is known as Uralian Orogeny. Although the latter orogeny is synonymous with the l-lercynian, but unlike the latter, it is principally a north - south trending mountain.However, only a branch of it in Tian Shan in central China, trending east - west as Hercynian belt.
In the United States of America, the above - mentioned orogeny is known as Appalachian Orogeny.
Furon propounded the following points:
Absence of Upper Carboniferous deposits in most parts of Iran, thus, Permian strata overstep lower Carboniferous, or Devonian and even other older formations.
Shotori Mountains and Tabas being west of Lut Block, trending north - south, and thus Uraline Orogeny had occurred in east - central Iran. Since Oman, and particularly Madagascar mountain belts possessed north - south trend, he called these mountain trends as Uraline Axis and considered them as contemporaneous with the Hercynian in Europe.
Since Furon hypothesis, many research workers assign the Upper Carboniferous stratigraphic gap as Hercynian movements of epeirogenic nature in Iran. But, since 1968 there have been evidences for Hercynian movements of erogenic nature, both in Iran and Afghanistan, which will be discussed in this paper.

Subject List : Hercynian Orogeny