On the Old Red Sandstones of Fifeshire

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Abstract
Introduction .—In a paper which I communicated to the Geological Society laut year *, I stated my belief in the conformability of all the 01d Red Sandstones as exhibited in Forfarshire. In that paper as originally framed, I had even questioned the correctness of Sir C. Lyell's section of the Forfarshire rocks (‘Manual of Geology‚), in so far as this shows an overlying unconformable conglomerate atthe White Ness, near Arbroath. Somewhat more careful investigation convinced me that in this at least I was mistaken; and this fortunately in time to have the copy of my paper so far altered before it appeared in the Society's Journal for November 1861. From subsequent investigation, I have seen no cause for supposing that ill any other locality in Forfarshire has this want of conformity been exhibited; and in order to be able to fix the horizon of the overlying and unconformable conglomerate at White Ness, I have been induced to extend my investigations into such parts of Fifeshire and Perthshire as I thought might throw light on this subject. I was the more induced to this, as it was shown in Mr. Geikie's paper*, of January 1860, that a break existed in the Old Red Sandstone of the South of Scotland; aad hence I suspected that, in all probability, the unconformable conglomerate at White Ness might belong to the upper members of the Old Red. In no instance have I yet found a section sufficiently continuous, and showing the upper and lower portion of

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