Abstract
The miliolite formations of the Hiran valley in Saurashtra occur almost from the present coast near Veraval to a maximum height of 130 m AMSL and further inland. Field and laboratory studies show that the rocks occurring up to 75 m AMSL are certainly of fluvio-marine origin, while those occurring above 75 m are of aeolian and fluvio-marine origins. The stratigraphical relationship of various Quaternary formations in the Hiran valley and in the adjacent areas shows that there were at least two major transgressive phases during which the bulk of the miliolite was formed, and the younger of the two miliolites belongs to the Late Pleistocene. The Hiran valley does not appear to be free from neotectonic movements as the maximum height of fluvio-marine miliolites does not exceed 30–45 m AMSL in other parts of southern Saurashtra. All these geomorphic changes of the Quaternary have been witnessed by Early Man.
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