Paleozoic Stratigraphy Of The Peshawar Basin, Pakistan

More documents

Recommendations

Info

intrvded by the granitic rocks belonging to the marginal mass of the Indian plate. Thetectonic setting of the basin is transitional between a sedimentmy fold- anti-thrust beltto the south and metamorphic terrane to the north, The unlithified sediments of thePeshawar basin are predominantly lacustrine silts with fluvial sand and gravel, Thebasin came into existence in Plio-Pleistocene time when more than 300 metres ofsediments were deposited in response to ponding of drainage by the rising Attock-CheratRange (Burbank & Tahirkheli, 1985). Exposures of the Paleozoic and oldcr strata arelimited to small outcrops within the basin (Fig. 2).The first geological account of the rocks of the southern Poshawar basin wasgiven by Coulson (1936) who included these rocks in the 'Attock Slatc' sequence andassigned Precambrian age. Martin and other (1 962) subdivided the rock sequence of thenortheastern Peshawar basin into "Swabi-Chamla Sedimentary Group" and "LowerSwat-Buner Schistose Group". Davis and Ahmed (1963) described orthoconic nautiloids
from the hills south of Swabi indicating a Paleozoic age. Teichert and Stauffer (1965)made in first discovery of Siluro-Devonian reef rocks near tohe town of Nowshera.Stauffer (1968a) described the reef complex and also reported other probable localitiesof Paleozoic rock from northern Pakistan. Ali and Anwar (1969) described the stratigraphyof the Nowshera reef complex. Latif (1970) collected corals from the NowsheraFormation at Pir Sabak hillock and suggested the possibility of Carboniferous age.Fuchs (1975) described the stratipaphy of rocks exposed near Swabi and Nowsheraarea. Pogue and Hussain (1986) established a revised stratigraphy and modified theprevious stratigraphic nomenclature of the southern Peshawar basin based on systematicgeological mapping and discoveries of trilobite trace fossils of Early to MiddleOrdovician age. As a result of their work the revision of stratigraphy of Peshawar basinbecame apparent. To establish the stratigraphic and structural setup, the area wasremapped and fossiliferous horizons were sampled. Bulk samples from the rocks unitswere also processed for conodonts studies.Fig. 2. Generalized geologic map of the castern Peshawar Basin showing areas for compositestratigraphic columns (fig. 3).
Page 1: ~ ~ oBull. l Univ. . Peshawar, 1991
Page 5 and 6: carboniferous age have also been id
Page 7 and 8: TABLE 1. FOSSIL LIST- --CAI = Conod
Page 9 and 10: The formation is composed of argill
Page 11 and 12: sylvanian age (Table 1 nos. 15, 16
Page 13: Latif, M.A., 1970, Low or Carbonife

Paleozoic Stratigraphy Of The Peshawar Basin, Pakistan

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?