REPORT OF THE DIRECTOR IQIO 



6l 



6 No. 138 Geology of the Elizabethtown and Port Henry 

 Quadrangles. By J. F. Kemp and Rudolf Ruedemann. I76p. 

 2opl. 3 maps. 



Contents: 

 Introduction 

 Chapter i Introduction 

 Chapter 2 Physiography 

 Chapter 3 General geology 



Grenville series 

 Chapter 4 General geology (con- 

 tinued) 



Metamorphosed eruptives 



Granites and related types 



Anorthosites 



Intermediate gabbros demonstra- 

 bly later than the anorthosites 



Syenite series 



Basic gabbros 



Unmetamorphosed basaltic dikes 

 Chapter 5 Paleozoic strata 



Chapter 6 Structural geology 

 Faults 



Chapter 7 Areal distribution 



Chapter 8 Areal distribution and 

 general structure of the Paleo- 

 zoic formations 



Chapter 9 Glacial and post-glacial 

 geology 



Chapter 10 Economic geology 



1 Iron ores 



2 Limestones 



3 Clay 



Chapter 11 ^lineralogy 



Bibliography 



Index 



7 No. 142 The ]\Iining *and Quarry Industry of New York 

 State. By D. H. Newland. 98p. 



Cotitoits: 

 Preface 

 Introduction 



Mineral production of New York 

 Some limitations of the mining 



field in New York State 

 Cement 

 Clay 



Production of clay materials 



IManufacture of building brick 



Other clay materials 



Pottery 



Crude clay 

 Emery 

 Feldspar 

 Garnet 

 Graphite 

 Gypsum 

 Iron ore 

 ]\Iillstoncs 



]\Iineral paint 



Mineral waters 



Natural gas 



Petroleum 



Pyrite 



Salt 



Sand 



Sand-lime brick 



Slate. Henry Leightox 



Stone. Henry Leightox 



Production of stone 



Granite 



Limestone 



Marble 



Sandstone 



Trap 

 Talc 

 Index 



