Welsh Journals

GEOLOGICAL RESEARCH IN CARDIGANSHIRE, 1842-1949 (PL. I. 2-4; MAP I. 7). CONTENTS: Purpose and scope. The Cardiganshire mining district. The Cardiganshire region on the earliest geological maps. "Cambrian" and "Silurian". The Geological Survey "horizontal sections". The Geological Survey one-inch maps. The Geological Survey smaller scale maps. Sedgwick on the structure of Cardiganshire. Keeping on the structure of Cardiganshire. The true structure established in North Cardiganshire. South Cardiganshire. The Aberystwyth Grits. The age of the tectonic structures. Palaeogeography of the Lower Palaeozoic era. Palaeontology. The Glacial Period. Geomorphology-the hill-top surface. The imitation of the drainage system. The plan of the relief and its relation to the gological structure. The form of the river valleys and the shape of the hills. The coast. List of works referred to.