A GEOLOGICAL RECONNAISSANCE OF THE DOMINICAN REPUBLIC. 



Chapter IV. Stratigraphic and structural geology and geologic history, by 



Wythe Cooke 50 



Stratigraphy 50 



Basal complex 50 



Character and extent 50 



Cordillera Central 50 



Samana Peninsula 53 



Cretaceous system 53 



Tertiary system 56 



Eocene series 58 



Oligocene series 61 



Tabera formation 63 



Cevicos limestone 65 



Miocene series 65 



Yaque group 65 



Subdivisions 65 



Previous studies 65 



Baitoa formation 66 



Bulla conglomerate 66 



Cercado formation 67 



Gurabo formation 69 



Mao Adentro limestone 73 



Mao clay 74 



Cerros de Sal formation 75 



Miocene or Pliocene series 76 



Plant-bearing beds at Sanchez 76 



Pliocene series 76 



Las Matas formation 76 



Quaternary system 76 



Structure 77 



Outline of geologic history 79 



Chapter V. Metamorphic and igneous rocks, by F. C. Calkins 83 



Metamorphic sedimentary rocks 83 



Granular intrusive rocks 84 



Dike rocks 85 



Lavas 86 



Tuffaceous rocks 87 



Chapter VI. Tertiary and Quaternary stratigraphic paleontology, by Thomas 



Wayland Vaughan and Wendell Phillips Woodring 89 



Objects of the paleontologic work 89 



Paleontologic literature 90 



Geologic correlation 91 



Relations of Dominican Tertiary and Quaternary biota 94 



Eocene 94 



Oligocene 95 



Miocene 96 



Yaque group, north side 96 



Baitoa formation 96 



Cercado formation 96 



Modified Cercado fauna 97 



Gurabo formation 98 



Mao Adentro limestone 100 



