Geology of the Nepal Himalaya by Megh Raj Dhital

Author:Megh Raj Dhital
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

17.4 The Dhulikhel–Panchkhal Area

The Lesser Himalayan sequence of the Dhulikhel–Panchkhal area (Fig. 17.5) is represented by the Benighat Slates. Light green-gray to yellow-gray phyllites and slates, feeble and laminated blue-gray argillaceous limestones together with a massive variety of laminated gray limestone, and sporadic amphibolites constitute this formation. Generally, the rocks are intensely deformed to yield tight and plunging folds. Approximately 250 m thick Jhiku carbonate beds, made up of flaggy as well as massive, laminated, blue-gray argillaceous limestones, are intercalated in slates. Owing to intense folding, the carbonates are repeatedly exposed in a number of places, where their axial traces trend essentially due east–west. At the southeast extremity of the Jhiku Khola, the tightly to isoclinally folded carbonate bands make a gorge, whereas in the Sobarne Khola light green-gray phyllites and slates alternate with dark gray-green amphibolites. The thickness of the Benighat Slates is more than 1,100 m, and its base is nowhere exposed.

Fig. 17.5Simplified geological map of the Dhulikhel–Panchkhal area. Source Based on field survey in 1997 by NK Tamrakar, KN Paudayal, and MR Dhital

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