Les transactions et les actes de l'histoire politique de la Suisse) . e, d'un grossier, en nature, par andpenetrated cassé beaucoup de veines (S. dip 20° W. à 46°), sous-jacentes whichare calcaires. Archaeoeyathinae Le countryalong la face du grand escarpement est beaucoup reproché.A la suite de l'escarpement de l'ouest, vers le sud, dans un secondspur, les fossiles disparaissent progressivement dans une matrice dolomitique,les fossiles se produisant dans tous les stades d'altération comme becomeabsorbed ils dans la matrice. [Sur cet éperon est un cas isolé, des rochers de grès groupof dont certaines sont de grande taille.] I

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Transactions and proceedings of the Royal Society of South Australia (Incorporated) . e, of a coarse-marble kind, much broken andpenetrated by veins (dip S. 20° W. at 46°), underlying whichare limestones containing Archaeoeyathinae. The countryalong the face of the great escarpment is much faulted.Following the western escarpment, going south, in a secondspur, the fossils gradually disappear in a dolomitic matrix, the fossils occurring in every stage of alteration as they becomeabsorbed into the matrix. [On this spur is an isolated groupof sandstone boulders, some of which are of great size.] Infollowing the line of outcrop, southwards, there is a narrow 48 belt of dark-coloured oolitic and laminated limestone, apparently brought in, as a repetition of the strata, by astrike fault. The limestones can also be traced up to thegreat pinnacle of quartzite which cuts them off on the southernside, by a dip fault, the quartzite having an apparent dipof 85°, westerly, on its abrupt face to the west. The outlierof oolitic and laminated limestones, brought in by the strike S.E.. fault, has a dip S. 30° W. at 55°, The junction of limestone againstthe quartzite on the fault plane, isa rotten brecciated rock. The lastsolid rock on the limestone side, is amarble (see fig. 1). THE GOKGE. On entering the gorge the lime-stones are seen to outcrop on bothsides of the creek, mostly on the </southern side, where they form aridge about 200 ft. high and make aspur, running westward, to theplains, where they pass from viewunder alluvium and sand. The lime-stone facing the plains has a strike Outlier by complex fault-E. 25° S., dip 45° westerly. The g 9.^ ji^^^stones pinched T . i i. ii T i. in between quartzites. gorge road intersects the limestones obliquely to the strike of the beds and supplies an interestingsection, as detailed below : — (a) The bottom series in the limestone belt begins abouthalf a mile from the entrance of the gorge, resting on thickquartzites which rise t

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