r 



INDEX TO GEOLOGY OF POUGHKEEPSIE QUADRANGLE 



119 



Hudson River formation, faulted 



limestone, 87-96. 

 Hudson River slate group, 11, 82-96. 

 Hunt, T. S., cited, iii, 112, 114. 

 Hyolithellus micans, 46. 



Ice sheet, retreat of, 100-4. 

 Illaenus crassicauda, 62, 67. 

 Illinois mountain, 7, 83, 93, 106. 



Jackson creek, 8. 

 Johnsville, 104. 



Kame deposits, 104. 



Kaolin deposits, 25, 109. 



Kemp, J. F., map prepared under 

 direction of, 5 ; acknowledgments 

 to, 5; cited, 97, 99, 100, 114, 115. 



Lagrangeville, 95. 



Land forms, 105-6. 



Leith, C. K., cited, 116. 



Leptaena (Plectambonites) sericea, 

 61, 83, 84. 



Limestone, 47 ; faulted, 87-96 ; quar- 

 ries, 108-9. See also Fishkill 

 limestone. 



Limonite deposits, 109. 



Lingulella, see Obolella. 



Lingulepis acuminata, 49. 

 minima, 49. 

 pinniformis, 49, 50, 51, 55, 59, 61. 



Lituites, 60. 



Logan, Sir William, cited, 26, iii; 

 mentioned, 10. 



Looking Rock, 7. 



Lovifer Cambric (Georgian) forma- 

 tion, y2. 



Lown, C, mentioned, 84; cited, 112. 



Lowville, 65. 



Maclure, William, cited, no. 

 Maclurea magna, 56. 



sordida, 60, 74. 

 Magnetite, 15, 16, 17, 18, 21, 24, 30, 



31, 32, 37, 38. 

 Manchester Bridge, 103. 

 Marlboro, 55, 83, loi, 109. 

 Marlboro mountain, 7. 



Mather, W. W., cited, 10, 26, 48, 61, 



83, no. 

 Matteawan, 6, 9, 12, 18-19, 30, 39, 72, 



78, 8S, 95- 

 Matteawan inliers, 26, 28-30, 34. 

 Merrill, F. J. H., cited, 114, 115. 

 Micaceous gneisses, 17. 

 Microcline, 15, 17, 18, 31. 

 Molding sands, no. 

 Monograptus, see Didymograptus ; 



Nemagraptus. 

 Moore's Mill, 88-89. 

 Mount Beacon, 20. 

 Mount Beacon brook section, 19-20, 



32, 32,- 

 Mount Honness, 7, 41, 99, 104. 

 Mount Honness spur, 7, 14, 21-23, 



34, 82. 

 Murchisonia gracilis, 60. 

 Muscovite, 18, 31. 



Nason, F. L., cited, 114. 



Nemagraptus gracilis, 84. 



New Hamburg, 8, 48, 64, 97, loi, 102, 



109. 

 Newberry, J. S., cited, 114. 



Obolella, 46. 



nana, 49. 



(Lingulella) prima, 49. 

 Old Hopewell, 74, 105. 

 Olenellus thompsoni, 46. 

 Oncoceras vassiforme, 61. 

 Ophileta, 60. 



compacta, 59, 60, 73, 75, yy. 



complanata, 60, 74. 



levata, 60, 74. 



sordida, 60. 

 Orthis, 59. 



lynx, 67. 



pectinella, 61, 67, 83. 



testudinaria, 61, 83, 84. 



tricenaria, 61. 

 Orthoceras apissiseptum, 61. 



henrietta, 61. 



primigenium, 60. 

 Orthocerata, 60. 

 Orthoclase, 15, 16, 18, 31. 

 Ostracod, 67. 



