Recent Observation on the Undifferentiated Attock Group
Abstract
Under the light of recent invetigations, the Attock Slates are found to certain five distinct lithological units which are easilty differentiated in the field and belong to different ages. Three of these units are dated to be Upper Mesozoic, one is assigned a pre-Cambrian age and the fifth unit is still under observation and is tentively placed in Paleozoic. The argillaceous part of the Attock Group which was previously considered to be one homogeneous unit is split into two divisions and named "Manki Slates" and "Dag Slates." The later contain fossilized bands of limestone and on the basis of diagnostic fossil (Cerithiopsidea), have been dated to be Upper Cretaceous age. These two slates have got tectonic contact and the older Manki slates are found to have thrust over the younger Dag slates.
References
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