CONTENTS. 5 



PAGE. 



Chapter VI. Tertiary and Quaternary stratigraphic paleontology, by Thomas 

 Wayland Vaughan and Wendell Phillips Woodring — Continued. 

 Relations of Dominican Tertiary and Quaternary biota — Continued. 

 Miocene — Continued. 



Yaque group, north side — Continued. 



Mao clay 101 



Monte Cristi district 101 



Yaque group, south side 102 



Cerros de Sal formation 103 



Miocene or Pliocene district of Samana 103 



Pleistocene or younger 103 



Extinct mammals of the Dominican Republic 104 



Lists of localities and fossils 105 



Eocene 105 



Middle Oligocene 107 



Upper Oligocene 110 



Probably Oligocene Ill 



Apparently upper Oligocene 112 



Miocene 113 



Yaque group, north side 113 



Baitoa formation 113 



Cercado formation 114 



Modified Cercado fauna 129 



Gurabo formation 130 



Deeper water facies of Gurabo formation 147 



Mao Adentro limestone 151 



Mao clay 153 



Miocene or older 153 



Yaque group, province of Monte Cristi 154 



Yaque group, south side 155 



Cerros de Sal formation 163 



Miocene or Pliocene, Province of Samand 165 



Pliocence or Pleistocene, Province of Monte Cristi 165 



Pleistocene or younger 166 



Chapter VII. Geology and water resources of the vicinity of Monte Cristi, 



by Clyde P. Ross 169 



Character and purpose of the work done 169 



Topography 169 



Geology 171 



Quartz diorite 171 



Oligocene (?) limestone and sandstone 171 



Oligocene tuffs 172 



Miocene sedimentary rocks 172 



Pliocene (?) gravel 175 



Pleistocene (?) beach deposits 175 



Recent alluvium 175 



Structure 176 



Water resources 177 



Surface water supply 177 



