With 3 Plates. PREFACE From field experience and data accumulated in recent years several short papers on field geology have been written. The present paper em
Since about 1300 the Mansfield copper deposits have been the most produ-ctive copper-field in central Europe (Fig. 2). To give you a quantitative ideaabout ite
Ⅰ.INTRODUCTION In a recent paper published by H.Chu and the writer on the pre-Sinianvolcanic series and associated intrusive rocks,predominantly of acid natur