...L. N. Gupta; Naveen Chaudhri; A. K. Prasad Abstract Basic and metabasic rocks occur in the form of an oval-shaped, plug-like body. intrusive into the granitic gneisses and metasediments belonging to the Chail Formation. The core is made of fresh olivine gabbro metamorphosed to varying degrees...

...N. S. Guru Rajan; N. S. Virdi Abstract The Chail Formation in Dalash area, Himachal Pradesh is intruded by a number of small granitic bodies which represent off-shoots of the Mandi-Karsog granite pluton of early Palaeozoic age. At the contact of these intrusions, hornfelses are observed...

... limestone, carbonaceous slate and quartzites are comparable with ShaH Series of ShaH window area (West, 1939); the younger rocks are thrust over by granitic gneisses (Chail formation). On both sides of the window the older rocks show a complete closure of the structure, thus, difining a complete window...

...Figure 1. Geological map of a part of the Himachal Himalaya. The propagation and extension of the oblique ramp into the hanging wall, marking the boundary between the Chail Formation and the Tethys Himalayan sequence (THS), is shown by a white broken line. K(R)W—Kulu (Rampur) Window; Fm...

... is occupied by three major formations, viz. Shali, Chail and Jutogh. The tectono-stratigraphy is as follows: Jutogh Formation - - - - - - - - - - Jutogh Thrust - - - - - - - - - Chail Formation - - - - - - - - - - Chail Thrust - - - - - - - - -- Shali Formation The lower most autochthonous ShaIi Formation...

...., the Jutogh Series and the Chail Series (Group and Formation respectively, Srikantia and Bhargava 1988) and two thrusts, viz., the Jutogh thrust and the Chail thrust. These lithotectonic units and thrusts have subsequently been traced northward into the Higher Himalaya by many workers (c.g. Chatterji...

... & Bhargava ( 1998 ) and Dubey, Bhakuni & Selokar ( 2004 ) ( Fig. 1 ). The Mandi-Karsog pluton lies within the Chail Formation and covers an area of ~ 30 km 2 . The regional trend of the pluton is parallel to curvature of the adjacent Chail Thrust (that is, N–S in the northern part, E–W in the southern...

... area has brought out that the' Lower Chail allochthon' includes (i) a sedimentary unit occurring as a cover over the Shali and designated as the Basantpur Formation of the Simla Group and (ii) a regional nappe tectonically overlying the Shali-Simla Groups and designated as the Salkhala thrust sheet...

... the Mandhalis underlie the Chandpur-Chail formation, almost certainly Algonkian to Lower Palaeozoic, it must be accepted that the contact between the two formations, at such places as the Keshau dam site on the Tons (30037f : 77°47 is a major thrust plane, as had been suggested 40 years ago. Since the Blaini...

... northwest to jOin up WIth the ChaIl Nappe of HImachal In the mner Lesser Himalaya the crystalhne klippen are underlain by a vast thlUst sheet of Berlnag quartzites (=Nagthat Formation) and penecontemporaneous baSIC volcanICS. ThIS Bennag Nappe IS the base-cut and beheaded northern extensIOn of stupendous...

...S. V. Srikantia; R. P. Sharma Abstract The study of 'Chail Series', 'Jaunsar Series' and 'Simla Slates' in the Simla Himalaya has brought out the incongruities in the present lithostratigraphy of these formations. The Simla group, divisible into four formations, is the revised classification...

... responsible for the formation of the Grampian and Appin group basins were also influential in the orogenic evolution of the basin-fill. Half-graben fills were deformed to produce regionally extensive folds such as the Stob Ban-Craig a Chail Synform. Keywords: Proterozoic, basins, sedimentology...

... al (op. cit). (i) The study of 'Jaunsar series' of Auden (1934) is closely related to another controversial formation 'Chail' whose status has been discussed in detail by Srikantia and Sharma (1971). They have shown that the 'Chail' in the area north of Simla is variously made up of the Jutogh...

...), Sharma, V.P. (1976). Bhargava (1982), Chakrabarty (1983), Kakkar (1989), Gururajan and Islam (1991). In the south, the Lesser Himalayan Rampur Formation consisting of quartzites and metavo1canics is exposed in a tectonic window within the a]]ochthonous crystalline thrust sheets, namely, the lower Chail...

... in the Himachal Pradesh, India. Tectonophysics, v.138, pp.69~77. THAK.UR, V.C. (1992). Geology of western Himalaya, Pergmanon press, London, 362p. VIRDI, N.S. (1979). Status of the Chail Formation vis-avis Jutogh-Chail relationship in the Himachal Lesser Himalaya Him. Geol., v.9(1), pp.111-125. (Received: 25 July...

... a succession of Blaini-Infra Krol-Tal overlying unconformably over the Chandpur-Nagthat and the base of these is depicted as Krol Thrust overriding the Subathu Formation unconformably overlying the Simla group. The Chail/ Jaunsar Nappes are described with a lithotectonic sequence. The Chail nappes are shown...

... and garnetiferous-biotite, phyllonite and schists of Jutogh Group. The two main thrusts recognized in the area are Chail thrust at the base of Chail Formation and Jutogh thrust at the base of the Jutogh Group which is considered as the continuation of the Main Central Thrust and is considered one of the most...

... into typical Chand pur phyllites, and there is no doubt that the Chandpurs are equivalent to the Chails. Hence, within the Chails there is a lateral and vertical variation in metamorphic grade which vitiates equating the more metamorphic rocks with a greater age. REVIEW 309 It is in the Darjeeling Himalaya...

... In his well known paper, Auden (1934, pp. 358-451), has described the strati- graphy and structure of the Krol belt. The chief formations exposed here are described below: Dagshai Subathu } Tertiary Krol Infra Krol Blaini Jaunsar Simla Slates Chail 1 Age not certain J Jutogh Archaean The Simla Slates...