Transactions of the 5th Caribbean Geological Conference

CONTENTS

FOREWORD. . . . . . . . . . . . . . . . . . . . . . . . . .i

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . .iii

DEDICATION . . . . . . . . . . . . . . . . . . . . . . . .iv

LIST OF DELEGATES . . . . . . . . . . . . . . . . . . . . . . . .v

PROCEEDINGS OF TIIE CONFERENCE . . . . . . . . . . . .vii

PAPERS READ BY TITLE . . . . . . . . . . . . . . . . . . . . . . . .xiii

PAPERS PRESENTED

GEOPHYSICS AND STRUCTURAL GEOLOGY

Some Aspects of the Gravity Field and Tectonics of the Northern Caribbean Region . . 1
Carl Bowin

Focal Mechanisms in the Caribbean, Middle America, and Northern iouth America . . .. .7
Peter Molnar and Lynn Sykes (abstract only)

Bathymetry, Geomagnetism, and Tectonics of the Caribbean Sea North of Colombia . .. .7
Dale C. Krause (abstract only)

The Structure, Sediments, and Possible Evolution of the Gulf of Mexico .... 8
John Antoine (abstract only)

A Preliminary Analysis of Aeromagnetic Profiles in the Gulf of Mexico and Caribbean 9
Thomas W. Donnelly (abstract only)

Junction of the Andean and Panamanian Chains in Northern Colombia . . . . . . . . . . . 11
J.E. Case, W.R. Moore, L.C. Duran, and Alfonso Lopez R.

Normal Faulting on the Soutllern Boundary of the Caribbean Sea, Unare Bay, Northern Venezuela . . . . . . 17
M.M. Ball, C.C.A. Harrison, P.R. Supko, W.D. Bock, and N.J. Maloney

Virgin Bank: Correlation of Magnetism and Gravity with Geology. . . . . . . . . . . 23
Vincent P.A. Renard (abstract only)

Tectonic Implications of Gravity and Aeromagnetic Surveys on the North and South Coasts of Puerto Rico 23
Andrew Driscom (abstract only)

Heat Flow in the Caribbean and Gulf of Mexico ... .. ..........24
David Epp, P.J. Grim. and M.C. Langseth, Jr. (abstract only)

MARINE GEOLOGY

Marine Geophysical Observations of the Eastern Puerto Rico-Virgin Islands Region . 25
Robert B. Starr and Robert G. Bassinger

Geology and Hydrodynamics of Punta Arena . . . . . . . 33
John M. Zeigler and Graham S. Ciese

Turbidite Detritus and Geosyncline History . . . . . . .39
H.J. MacGillavry (abstract only)

Bathymetry and Mineralogy of a Submerged Plain, South of Roosevelt Roads, Puerto Rico . . . 39
RobertW. Morton (abstract only)

Upper Slorpe Bathymmetry off Guayanilla and Ponce, Puerto Rico ... ..41
William D. Athearrn

Clay Mineralogy of Recent Alluvial-Marine Sediments, Western Puerto Rico .. .45
R. Gordon Pirie (abstract only)

Rocks and Sediments from thc Barracuda Fracture Zone . . .. . . . . . . . . . . . . . . . . .45
Enrico Bonatti (abstract only)

Recent Carbonate Sediments in the Bahamas: A Review .....47
Jack Donahue (abstract only)

Mineralogy of the Sediments from the Straits of Florida . . . . . . . .47
John D. Gassaway and Fredenck R. Siegel (abstract only)

Some Submerged Coral Reefs in the Caribbean . . . . . 49
G. Macintyre

Distribution of Littoral Sediment on the Windward Coast, St. Vincent, W. I. .. 55
Rodney D. Adams

Geological Reconnaissance of Parts of Aves Ridge . . . . . . . . . . . . . . . . . . . . . . . . 61
James l . Marlowe

Igneous Rocks from the Beata Ridge .. . . . . .. . .. . . . . .. ...65
P.J. Fox, B.C. Heezen, W.F. Ruddiman, and W.B. Ryan

REGIONAL GEOLOGY

Serpentinite, Gneiss, and Bedded Chert in Puerto Rico ...............67
Peter H. Mattson (abstract only)

Lateritic Crust and Late Tertiary-Quaternary Marine Deposits at Punta Guanajibo, Puerto Rico . . . . . . 67
David P. Schwartz and Peter H. Mattson (abstract only)

Summary of the Geology of the British Virgin Islands .........67
CharlesE. Helsley

Luminescent Properties of Puerto Rican Limestones ..............77
Jack Donahue and Peter Mattson

Geology of the Puerto Plata Area, Dominican Republic, Relative to the Puerto Rico Trench . . . . . . . . . . . 79
Frederick Nagle

New Data on the Stratigraphy of Curacao, Netherlands Antilles . . . . . . . . . 85
D.J. Beets

Geology of La Blanquilla Island with Notes on Los Hermanos Islands, Eastern Venezuela . . . . . . . .91
Neil J. Maloney

Geology of Aves Island, Venezuela ...................................97
N.J. Maloney, C. Schubert, J.l. Marlowe, andA. T.S. Kamsay

Ultramafic Rocks in the Peninsula of Paria, Venezuela . . . . . . . . 103
Clemente Conzalez de Juana and Nicolas C. Munoz J.

Gravity Sliding and Trough Migration in the Central Part of the Venezuelan Coast Ranges .......113
J.S. Bell (abstract only)

Seafloor Deposits of Serpentinite in the Guajira Peninsula, Colombia . . . . . . .. . . 113
John P. Lockwood (abstract only)

Moventent on the Oca Fault, Northcrn Colombia-Venezuela . . . . . . . . . . . . . . . . 114
W.D. MacDonald (abstract only)

Cretaceous Metamorphism in Northern Colombia . . . . . . . . . . 114
W.D. MacDonald (abstract only)

Reconnaissance Geologic Map of Mosquitia Region, Honduras and Nicaragua Caribbean Coast . . . . 115
R. l . Mills and K.E. Hugh (abstract only)

A Comparison Between the Tertiary Stratigraphy of Guyana and Trinidad . ... ... .. . .116
John B. Saunders and Sobharam Singh (abstract only)

Metamorphic Facies Between Valencia and Puerto Cabello in the Cordillera de La Costa, Venezuela 116
Benjamin A. Morgan (abstract only)

Geology of the Western Sierra de Los Cuchumatanes, Guatemala: A Preliminary Report . . . . . . 117
R.E. Clemons and Burke Burkart

SYMPOSIUM ON STRATIGRAPHIC ZONATION OF THE CRETACEOUS

The Biostratigraphy of Some Cretaceous Caribbean Corals . . . . . . . . . . 119
A . C. Coates (abstract only)

Biostratigraphy and Assemblages of Antillean Cretaceous Bivalvia . . . . . 119
Erle G. Kauffman (abstract only)

Ostracode Biostratigraphy in the Maestrichtian Rudist Sequences of Jamaica . . .120
Joseph E. Hazel (abstract only)

Rudists in Cretaceous Reef Facies Biostratigraphy of the Gulf of Mexico and Caribbean Region . . . . . . 120
Bob F. Perkins (abstract only)

Integration of Upper Cretaceous Planktonic Foraminiferal and Ammonite Zonation: Discussion of the Status of European Stratotypes ..............................121
EmileA. Pessagno, Jr. (abstract only)

Zonation by Larger Foraminifera of the Caribbean Cretaceous and Lower Tertiary . . . 122
E. Robinson (abstract only)

Cretaceous Gastropoda of the Caribbean Region . . . . . . . . . . . . . . . . . 122
Norman F. Sohl (abstract only)

PALEONTOLOGY AND STRATIGRAPHY

Distnbution of Ostracodes in the Oligomiocene of the Northern Caribbean . . . 123
W.A. van den Bold

Zonation of the Cretaceous and Lower Tertiary of the Caribbean Region Based on Planktonic Foraminifera and Nannoplankton ..................................129
Hans M. Bolli and John B. Saunders (abstract only)

Tertiary Biostratigraphy of Central Jamaica: Tectonic and Environmental Implications .. .. . . . 129
Raymond M. Wright (abstract only)

Planktonic Foraminifera from the St. Ann's Great River Valley, Jamaica . . . . 130
George C. Esker, IlI (abstract only)

Modern Pollen Distribution off Southwestern Puerto Rico-A Preliminary Report .. . ... . . .130
Daniel Habib, Jack Donahue, and David H. Krinsley (abstract only)

Sediments and Foraminiferal Paleontology of the Caho Rojo Platform, Southwestern Puerto Rico . . . . 131
R. Gordon Pirie, Donald J.P . Swift, and George A. Seiglie (ahstract only)

Preliminary Report on the Foraminifera of the Oligocene and Miocene of Southern Puerto Rico . . . . . . . . 132
George A. Seiglie and Pedro J. Bermudez (abstract only)

Tertiary Larger Foraminifera and Coral Succession, Northern Central America ......... 133
S. H. Frost

Foraminiferal GenusPelosina in the Caribbean and its Relationships to the Paleozoic Problematic Genus Thuramminoides .. . . . . . . . . . . . . . . . . .137
James E. Conkin and William K. MacFarquhar

Relationships Between the Distribution of Amphistegina and the Submerged Pleistocene Reefs off Western Puerto Rico ..............................141
George A. Seiglie (abstract only)

Palynology of the San Sebastian Coal (Oligocene) of Puerto Rico . . . . . . . . . . . . . . 141
Daniel Habib (abstract only)

The Foraminifera and Micromollusks of Hogsty Reef and Serrana Bank and their Paleoecological Significance 143
Wayne D. Bock and Donald R. Moore

IGNEOUS PETROLOGY

West Indian Volcanic Eruptions and the Hazard to Human Populations . . . . . . . . . . . 147
J.F. Tomblin

Geochemistry and Genesis of Lesser Antillean Volcanic Rocks . . . . . . . . . . . . . . 153
J.F. Tomblin (abstract only)

The Melting Relations of Some Calc-Alkalic Volcanic Rocks from the West Indies and the Solomon Islands ... . .. .. . .153
G.M. Brown and J.F. Schairer ( abstract only)

Chemistry and Petrology of the Lapa Lava Member of the Robles Formation, South Central Puerto Rico . . . . 154
Wayne T. Jolly (abstract only)

Variations in Calc-Alkalic and Tholeiitic Volcanism in the Puerto Rico Orogen . . . 154
Edward C. Lidiak (abstract only)

Composition, Origin, and Differentiation of Basalt Magma in the Lesser Antilles 155
John F. Lewis

Chemical Evidence for a Diversity of Ongin of Antillean Igneous Rocks . . . . . . . . 163
Thomas W. Donnelly, John J. W. Rogers, and Paul Pushkar (abstract only)

Status of the Lesser Antilles as a Volcanic Island-Arc . ... .... . . . . . .. .. . . . . .165
P.E. Baker (abstract only)

Magmatic Activity and Changes with Time of Type, Place, and Environment of Igneous Rock Formation in North-Central Puerto Rico ............165
Arthur E. Nelson (abstract only)

Los Volcanes de Colombia ........................................166
Jesus E. Ramirez (abstract only)

Igneous Rocks of the Terre-Neuve Mountains and Massif du Nord, Haiti . . . . . 167
Stephen E. Kesler and Clenn F. Carpenter

ECONOMIC GEOLOGY

Engineering Geologic Map of thc Caribbean Region . . .173
Pedro A. Gelabert

The Search for Mineral Deposits in the Tropical Rain Forests of Guyana-A Review of the Applications ofModern Techniqucs of Mineral Exploration in the Tropical Rain Forest Terrain . . . . 179
Sobharam Singh

Tectomagmatic and Metallogenic Relationships of the Central Panama-Costa Rica Region . . . . . . 189
A. Ferencic, D. del Ciudice, and C. Recchi

The Newcastle Porphyry and Associated Sulphide Mineralization, Eastern Jamaica ..........199
Douglas B. Craig (abstract only)

Petroleum Geology of Temtono Federal Delta Amacuro, Venezuela . . . . .. . .. . .. . .199
S. T. Pees, L.M. Banks, and A. Segovia (abstract only)

GEOMORPHOLOGY, PLEISTOCENE GEOLOGY, AND SOIL SCIENCE

Review of Ceomorphological and Pleistocene Research in the Caribbean . . . . . . 201
John D. Weaver

Problems of Cuesta-Landforms, with Special Regard to the Antilles ......... 207
Helmut Blume -

Late Tertiary Erosion Surfaces and Pleistocene Sea-Levels in Jamaica . . . 213
E. Robinson

Elevated Pleistocene Sea-Level Features in the Bahamas ................ 223
A. Conrad Neumann (abstract only)

Effect of the Pleistocene on the Landforms of Rio de La Plata Area, Puerto Rico ........... 223
Richard S. Williams, Jr. (abstract only)

The "Ten-Fathom Terrace" on Bermuda: Its Significance as a Datum for Measunng Crustal Mobility and Eustatic Sea-Level Changes in the Atlantic . . . . . . . . . . 224
Daniel J. Stanley (abstract only)

The General Pattern of the Soils of Puerto Rico ........225
Friedrich H. Beinroth

HYDROLOGY

Topography and Groundwater in Southwestern Jamaica . . . . 231
LeslieA. Wedderburn

Hydrogeological Problems of the Kingston Area. Jamaica . . . 235
W.F.G. Cardy

Land Use and Climatic Effects on the Water Regime of the U. S. Virgin Islands . . . . . . . . . . . . . . . . . . 239
Donald C. Jordan (abstract only)

The IHD in the Caribbean . . . . . . .. . . . .. . .. . . . . . . . . . . . . .. . . . .239
L.A. Heindl (abstract only)

Geology-An Influence on Schistosomias . . . . 240
James W. Crooks (abstract only)

STRUCTAL SYNTHESIS AND HISTORICAL DEVELOPMENT

A Theory of Origin of the Caribbean Basin..................241
Reginald P. Briggs (abstract only)

The Geological History of the Caribbean Sea and its Surrounding Areas . . . . 243
Jacques Butterlin

Paleogeography and Geological History of the Greater Antilles . . . . 249
K.M. Khudoley andA.A. Meyerhoff (abstract only)

Origin of the Eastern Greater Antilles, Environment of Deposition, and Tectonic Development . . . . . . . . . 249
Lynn Glover III (abstract only)

Structure and Development of the Lesser Antilles . .. . . . . . . . . . . . . . . . 250
L. Kenneth Fink, Jr. (abstract only)

GENERAL

Status of Geological Research in the Florida Keys: Progress and Problems
H. Gray Multer (abstract only)

Geologic Sensor Studies in the West Indies ................................251
John F. Cronin, Richard S. Williams, and John B. Adams (abstract only)

Geologic Applications of Aenal Spectrophotography: Preliminary Findings from Cayo Icacos, Puerto Rico . . . . . . . 252
Richard S. Williams, Jr. (abstract only)

Progress on the Geologic Map of Puerto Rico . . . . . . . . 252
Reginald P. Briggs (abstract only)

Bibliography and Index of the Geology of Puerto Rico . . . . 253
Marjorie Hooker (abstract only)

INDEX OF AUTHORS

INDEX OF GEOGRAPHIC AREAS . .