Torlesse mélange and coherent sequences, eastern Ruahine range, north island, New Zealand

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Abstract
From E to W, three NE-trending, tectonically concordant structural belts ean be recognised in the area investigated: (a) the Kashmir Belt, coherent sandstones and argillites with plant debris and conglomerates; (b) the Pohangina Melange, 1':5 km of disrupted argillite, sandstone, chert, volcanics, and limestone; and (c) the Axial Belt, a mixture of coherent and disrupted sequences including a coarse, limestonebearing conglomerate. In the Kashmir BeH, most of the beds are overturned to NW and have been affeeted by: (a) isoclinal folds with thinned-out eastward-younging limbs; (b) subhorizontal open asyrnmetric folds; and (c) steeply plunging open folds due to faulting. In the Axial Belt refolding of early dextral folds by subhorizontal asyrnmetric and steeply plunging open folds is indicated. The Pohangina Mélange may represent a more distal facies assemblage than the other belts, with transition to abyssal sedimentation. The juxtaposition of the three belts may be due to teetonie (gravitational?) irnbrication and subsequent tilting in a wedge of detrital sediment prograding onto a sea f1oor of volcanies, cherts, and red argillites.