Transactions of the 12th Caribbean Geological Conference
TABLE OF CONTENTS
General Papers
Geological Arguments Suggesting a Pacific Origin for the Caribbean Plate.........James L. Pindell 1
Hurricane Impacts on Caribbean Peaches: The Development of a Data Base and Guidelines for Coastal Area Planning and Management.........Malcolm Hendry and Peter Bacon 5
Origin ol the Eastern Caribbean: Data trom Reptiles and Amphibians..............Jonathan Roughgarden 10
Morphology and Developmenl of Modern Carbonate Foreslopes Tongue of the Ocean eshamas.............G.M. Grammer, RM Ginsburg snd D.F. McNeill 27
Topical Papers (approximately clockwise trom Cayman Trough)
Cayman Trough
Structure and Spreading History of the Central Cayman Trough.........M Terence Edgar,William P. Dillon, Colin Jacobs, Lindsay M. Parsons, Kathryn M. Scanlon and Troy L. Holcombe 33
Cuba
Interpretacion de los Datos Geofisicos con Fines de la Cartogralia Geologo-Estructural de la Republica de Cuba.................Manuel Pardo, Verania Bello, Hilda Amador, Sandor Taba, Oleg Sousin, lleana Matamoros y Irio de Moya 43
Geoquimica de la Asociacion Ofiolitica de Cuba.....E. Fonseca, F. Castillo, A. Uhanov. M.Navarrele and Q Correa 51
Posicion Estratigrafca de los Rudistas de Camaguey Cuba......... M.A. Itunralde Vinent, A. de la Torre y Callejas 59
La Constitucion Geologica del Macizo Isla de la Juventud y su Metalogenica Endogenia Vinculada ai Magmatismo Acido .......Manuel E. Pardo-Echarte 68
Evolucion de la Estructura dei Maci~o de Escambray Sur de Cuba Central..............Guillenmo Millan-Trujillo 82
Correlacion de las Metavuicanitas de la Sierra del Purial (Cuba Onental)
con las Rocas de la Asociacion Ofiolitica...........Mario Campos y Margarita
Hemandez 95
Jamaica
Short Review of the Ostracoda of the Montpelier and Coastal Groups of Jamaica............W.A. van den Bold 99
Grand Cayman
Sedimentology of the Late Pleistocene Ironshore Formation on Grand Cayman........Ian G. Hunter and Brian Jones 104
Porosity and Permeability Development in the OligoceneMiocene Bluff Formation, Grand Cayman.........................Kwok-Choi Ng and Brian Jones 115
Geologic Evolution of the Oligocene-Miocene BluRFormation Grand Cayman.......Brian Jones,lan G. Hunter and Kwok-Choi Ng 125
HispaniolaMorphology structure and Active Tectonism ol the Insular Margin OH Northwestern Hispaniola............ William P Dillon, Kathryn M. Scanlon, Jarnes A. Austin Jr. M. Terence Edgar, Lindsay M. Parson and Gordon E. Ness 133
Tectonostratigraphy ot the San Francisco Ridge Area In the Northeastem Cibao Valley Dominican Republic.................................Agathe C. Nadai 143
Prellminary Report on a Late Tertiary Plant Microfossil Assemblage Irom Haiti................Alan Graham 156
Late Holocene Ostracoda in and Around Lake Enriquillo Dominican Republic.................W.A. van denBold 163
Petrography and Geochemistry of Malic Rocks of the Peratvillo Formation in the Sabana Potrero Area Central Dominican Republic.............J Espaillat, Q Bloise and J.G. Macveigh and lF. Lewis 190
Geological Setting and Base and Precious Metal Deposits ofNorthern Haiti................Kyriacos Louca 200
Puerto RicoLandslide Processes in Saprolitic Soils ol a Tropical RainForest Puerto Rico............ Matthew C. Larsen and Andrew Simon........... 217
Extensional Tectonism in the Mona Passage Puerto Rico and Hispaniola: A Preliminary Study..... D.K Larue and H. F. Ryan...........223
Neotectonics ol the Puerto Rico Trench: Extensional Tectonism and Forearc Subsidence..... ...D.K. Larue, J. Joyce and H.F. Ryan ..............231
Radiometrically Dated Marine Terraces on NorthwesternPuerto Rico...............Bruce E. Taggan and James Joyce 248
Depth of Emplacement ot Granitoid Plutonic Rocks in the Eastern Greater Antilles Island Arc....Edward G. Lidiak 259
Late Jurassic to Late Cretaceous Development of Island Arc Crust in Southwestem Puerto Rico...........Johannes H. Schellekens, Homer Montgomery, James Joyce and Alan L. Smith 268
Virgin Islands
Toxic Substances in the Coastal Environment of the US Virgin Islands 1986.....B. L. Oostdam 282
Taphonomic Biasing ot Subfossil Echinoid Populations Adjacent to St. Croix U.S.V.I............Benjamin J. Greenstein 290
Cretaceous Tectonic Complex St. Croix..........Robert Speed and James Joyce 301
A Note on the Relative timing of Cleavage Formation and Magmatism in the Cretaceous Rocks ot St. Croix U.S.Virgin Islands.........Grenville Draper and Jamie M. Bartel 314
Lesser Antilles
Characteristics of Volcanic Centers from the Lesser Antilles......................A.L Smlth and M. J. Roobol 319
Reefs of Antigua, West Indies: Changes over 40 years.......................Malcolm P. Weiss 329
Map of Modern Reefs and Sediments of Antigua, West Indies..................M. P. Weiss and H. Grey Multer 340
The Cretaceous Age Sediments of the Saba Bank and Their Petroleum Potential..........Ariel J. Warner Jr. 341
Barbados
Stress Induced Modification of Sediment Mass Physical Properties During Accretion: A Reconstructional Approach....Wamer Bruckmann.................. 355
Origin and Geological implications of Diagenetic Limestone in Fault Zones of Barbados............Rudolph Torini Jr., Robert C. Speed and George E Claypool 366
Staple Isotopic Compositions of Diagenetic Carbonate in hemi-pelagic and Terrigenous submarine Fan Strata, Barbados, West Indies.........Rudolph Torrini, Jr., Roben C. Speed and George E. Claypool 371
Trinidad and Tobago
Patch Reef Ecology, Sedimentology and Distribution Buccoo Reef Complex, Tobago.......D. Hudson and EW. Mountjoy 376
Stratigraphic and Structural Relationships on Tobago, West Indies, and Some Tectonic Implications.............A.W. Snoke, J.D. Yule, D.W. Rowe, G. Wadge and W.O. Sharp 389
Structural Features Associated with the Los Bajos Fault and Their Interpretation in the Light of Current Theories of Strike-Slip Tectonics...........Llewellyn Tyson 403
An Evaluation of the Geological History and Hydrocarbon Potential of the Late Miocene - ? Plio/Pleistocene Sediments of the Goudron Field - Trinidad...................Carol P. Telemaque...............415
Exploitation of the Middle Miocene Oil Bearing Intermediate Herrera Sandstone Reservoirs in Trinidad, West Indies ...............Fazal Hosein 430
Significance of Geothermal Gradients in Petroleum Exploration in Trinidad...............Kirton Rodrigues...........444
Southern Caribbean and Venezuela
Contribution of Paleomagnetism in the Relations Between the Piemontin and Internal Nappes of the Venezuelan Caribbean Chain: Synthesis and New Data.......................B.Blin, B. Sichler and J.F. Stephan 453
The Caribbean-South American Plate Boundary, Araya Peninsula, Eastern Venezuela........Hans G. Ave Lalleman 461
A Kinematic History tor Eastem Margarita Island, Venezuela....................L.R. Guth and H.G. Ave Lalleman 472
History of Gold Mining on the Island of Aruba, Dutch West Indies..................Robert Salna..........481
Eocene Stratigraphical Studies, Maracaibo Basin, Northwestern Venezuela..............Rosina Pittelli Viapiana 485
Central America
Interpretation of Gravity Anomalies, Masaya Caldera Complex, Nicaragua.....Charles B. Connor and Stanley N. Williams 49!
Active Tectonics of the Chortis Block.........Mark B. Gordon, Michael Kozuch and William R. Muhlberger ...........503
The Chortis Block is Continental, Pre-Mesozoic Terrane........................................Mark B. Gordon 501
Sedimentary Rocks of the Santa Cruz Ophiolite, Guatemala - A Proto-Caribbean History..........Joshua H. Rosenfeld.............513
Tectonics and Petroleum Potential of Belize.........R. Prasada Rao and R. Ramanathan 521
Abstracts of the 12th Caribbean conference 521