. The Quarterly journal of the Geological Society of London. stur-bance amounting to fracture and dislocation, combined with more orless complicated inversion, the result of lateral pressure along aregion which has suffered, and from the same cause, a similar thrustto that affecting the place known as the spring of any ordinaryarch. The detailed examination of the upper Punjab has not been com-pleted ; and only the general facts bearing upon the peculiar junction-boundary of a large and important group of the local rocks have beenconsidered, with the impression that it is only by collecting su
. The Quarterly journal of the Geological Society of London. stur-bance amounting to fracture and dislocation, combined with more orless complicated inversion, the result of lateral pressure along aregion which has suffered, and from the same cause, a similar thrustto that affecting the place known as the spring of any ordinaryarch. The detailed examination of the upper Punjab has not been com-pleted ; and only the general facts bearing upon the peculiar junction-boundary of a large and important group of the local rocks have beenconsidered, with the impression that it is only by collecting such factsand comparing them with others similarly obtained that the natureand value of obscure points in physical geology can be arrived at. EXPLANATION OF PLATE VII. Sketch Map showing the Newer Tertiary boundary in North-western India. Discussion. Mr. Drew gave some further explanation of the authors viewsand of the geology of the district. Prof. Ramsay agreed with the author as to the analogy between h2 Quail R ,£o , VuIIht ,. MAP SHOWING THE NEWER TERTIARY BOUNDARY in NORTH-WESTERN INDIA lith 80 A. B. WYNNE ON THE PHYSICAL GEOLOGY OE THE UPPEK PUNJAB. the outer ridges of the Himalayas and those of the Alps, and alsoas to the difficulty in such cases of distinguishing between an in-version and a fault. From the different conditions as to metamor-phism of the Miocene and Eocene rocks in the Alps, he had beenled to question the fact of the inversion, and now found that mostSwiss geologists had come round to the opinion that the presentposition of the beds was not due to mere inversion but to actualdislocation. He thought this might also prove to be the case inthe Himalavas. A. C. RAMSAY ON THE VALLEY OF THE RHINE. 81 13. The Physical History of the Valley of the Rhine. By A. , , (Read February 4, 1874.) [Plate VIII.] Having on several journeys, extending over more than twentyyears, had occasion to traverse the val
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