Welsh Journals

THE GEOLOGICAL HISTORY OF BRECKNOCK BY F. J. NORTH I. INTRODUCTION II. THE RECORD OF THE ROCKS AND How IT IS INTERPRETED III. THE CHARACTER OF BRECKNOCK AND ITS RELATION TO THE SURROUNDING COUNTRY IV. THE GEOLOGICAL HISTORY OF BRECKNOCK (a) Before the beginning of the local rock record i. Pre-Cambrian times ii. The Cambrian Period (b) The early part of the local rock record i. The Ordovician Period ii. The Silurian Period (c) The Devonian Period and the accumulation of the Old Red Sandstone (d) The completion of the rock record i. The Carboniferous Limestone ii. The Millstone Grit iii. The Coal Measures V. THE UNRECORDED AGES A recapitulation VI. THE ICE AGE VII. BRECKNOCK TODAY; SOME FEATURES OF ITS SCENERY (a) The River System (b) Swallow holes, caves, and underground rivers (c) Waterfalls VIII, BIBLIOGRAPHy-GEOLOGICAL MAPS