Transactions of the 6th Caribbean Geological Conference
Vl CONFERENCIA GEOLOGICA DEL CARIBE - MARGARITA, VENEZUELA
MEMORIAS 1972
INDICE DE MATERIAS -TABLE OF CONTENTS
ORGANIZACION DE LA CONFERENCIA
DEDICATORIAAUTORIDADES HONORARIAS DONATIVOS RECIBIDOS
NOMINA DE PARTICIPANTES - LIST OF DELEGATES ..........1
PROGRAMA DE ACTOS.-PROGRAMME OF EVENTS ............6
SESION INAUGURAL.-FORMAL OPENING SESSION ...........13
DISCURSO DE BIENVENIDA, POR EL PRESIDENTE: DE LA Vl CONFERENCIA.GEOLOGICA
DEL CARIBE, DR. CLEMENTE GONZALEZ DE JUANA .. . . . . . 13
DISCURSO DE INAUGURACION, POR EL ING. INMER BELIS EN REPRESENTACION DEL
PRESIDENTE: DE LA REPUBLICA, DR. RAFAEL CALDERA .......14
REUNION EN EL CASTILLO DE PAMPATAR-MEETING AT PAMPA-TAR CASTLE-CHARLA, POR
EL SR. ALFREDO BOULTON .........16
ACTA DE LA SESION DE CLAUSURA-MINUTES OF THE CLOSING SESSION .......17
EXCURSIONES LOCALES - LOCAL EXCURSIONS
L-1: FIELD TRIP TO THE RINCONADA GROUP, by W.V. MARESCH ........20
L-2: ZONA NORORIENTAL DE LA PENINSULA DE MACANAO, por J. M. I. DE AROZENA 22
L-3: FLYSCH EOCENO DE LA ISLA DE MARGARITA, por N. G. MUNOZ J.. 25
L-4: SEDIMENTOS DEL TERCIARIO SUPERIOR Y CUATERNARIO DEL SUR
DE LA PENINSULA DE MACANAO, por CLAUS H. GRAF .............. 28
L-5: ALGUNAS NOTICIAS SOBRE NUEVA CADIZ, ISLA DE CUBAGUA, POR J. M. CRUXENT ..............33
L-5a: EXCURSION ALREDEDOR DE MARGARITA ORIENTAL, por C. GONZALEZ DE JUANA .............36.
EXCURSIONES POST-CONFERENCIA-POST-CONFERENCE EXCURSIONS
PC-l- ZONA DE CARUPANO - LA ESMERALDA, ESTADO SUCRE, por R. S. SIFONTES Y F.J. SEIJAS................38
PC-2: EXTREMO OCCIDENTAL DE ARAYA, por MARIO VIGNA1I............ 44
PC- 3: FIELD TRIP TO THE ISLAND OF LA ORCHILA, por C. SCHUBERT .......48
PC4: COSTA VENEZOLANA ENTRE CUMANA Y PERTIGALETE, por C. GONZALEZ DE JUANA ...................54
AREA DE PERTICALETE Y AUTOPISTA PUERTO LA CRUZ-EL TIGRE, por L SAIZARBITORIA ................58
GEOLOGIA REGIONAL- REGIONAL GEOLOGY
ROCAS METAMORFICAS E IGNEAS EN LA PENINSULA DE MACANAO, MARGARITA, VENEZUELA, por C. GONZALEZ DE JUANA Y M. VIGNALI ..........63
GEOLOGIA DEL ARCHIPIELAGO DE LOS FRAILES, por P. MOTICSKA ........69
NUEVAS OBSERVACIONES GEOLOGICAS ACERCA DE LA ISLA AVES, VENE ZUELA, por J. PANTIN HERRERA ..................63
GEOLOGIA GENERAL DE LA ISLA DE ARUBA, por w. PETZALL ...........79
GEOLOGICAL RECONNAISSANCE OF THE VENEZUELAN ISLANDS IN THE CARIBBEAN SEA BETWEEN LOS ROQUES AND LOS TESTIGOS, by C. SCHUBERT AND P. MOTISKA ..............81
SEDIMENTACION Y ALOCTONIA EN EL FRENTE DE MONTANAS DE GUARICO, por L. A. GONZALEZ SILVA Y XAVIER PICARD ........................83
MORPHOLOGY AND SURFICIAL GEOLOGY OF NORTHWESTERN DOMINICAN REPUBLIC, by G. ANTONlNI.............................................89
PECULARITIES OF CUESTA LANDFORMS IN PUERTO RICO, by H. BLUME ..96
THE VOLCANIC GEOLOGY OF JAMAICA, by M. J. ROOBOL .............100
PRINCIPALES RASGOS DEL DESARROLLO DE CUBA ORIENTAL EN EL CENOZOICO TARDIO, por I. P. ICARTASHOV Y N. A. MAYO ........108
THE DRAGON GNEISS OF PARIA PENINSULA ( EASTERN VENEZUELA ), by H. G. Kugler.......113
GEOLOGIA DEL MORRO DE LA ESMERALDA, DISTRITO RIVERO, ESTADO SUCRE, por R. 9. SIFONTES Y F. S. SEIJAS ..............................117
ROCAS INTRUSIVAS JOVENES EN LA REGION DE CARUPANO, por R. S. SIFONTES Y F. SANTAMARIA.............121
A MIDDLE EOCENE FLYSCH FROM EAST FALCON, VENEZUELA, by V. F. HUNTER..........126
THE GEOLOGY OF WAGWATER BELT, JAMAICA, by G. W. GREEN. .....131
POSSIBLE SUBAERIAL OUTCROPPING OF HORIZON "A", NORTHWESTERN PUERTO RICO, by D. H. MCINTYRE AND J. M. AARON..........132
A NEW INTERPRETATION OF THE MAYA MOUNTAINS, BRITISH HONDURAS, by J. H. BATES0N .............132.
GEOLOGIA ECONOMICA-ECONOMIC GEOLOGY
ANALISIS METALOGENICO DEL YARACUY OCCIDENTAL, por S. E. RODRIGUEZ...............133
PUERTO RICAN PORPHYRY COPPER DEPOSITS, PETROLOGY AND ALTERATION, by D. COX ........139
EXPLORATION GUIDES FOR Pb-Zn MINERALIZATION IN THE CHIANTLA DISTRICT, SOUTHERN ALTOS CUCHUMATANES, GUATEMALA, by
S.E. KESLER, R. ASCARRUNZ AND T. N. ANDERS0N ...........141
RECURSOS DE HIDROCARBUROS EN EL AREA VENEZOLANA DEL CARIBE Y PROBLEMATICA DE SU EXPLORACION, por A. R. MARTINEZ ........146
ANOMALIAS EN LAS CUENCAS CARBONIFERAS DE VENEZUELA, por C. KAPO Y V.M. LOPEZ.......149
THE GEOLOGY OF GRAND CAYMAN AND ITS CONTROL OVER THE DE-VELOPMENT OF LENSES OF POTABLE GROUNDWATER, by J. D. MATHER ...........154
A NEW APPROACH TO DEVELOPMENT DRILLING IN TRINIDAD-TESORO, by K. M. PERSAD ...........158
THE APPLICATION OF CARBONATE FACIES ANALYSIS TO LANDFORM STUDIES FOR DEVELOPMENT IN CAT ISLAND AND ABACO ISLAND BAHAMAS, by R. N. YOUNG ........163
MINERALOGY, HOST ROCK ALTERATION, AND FRACTURE PATTERN AT MINE HILL AND COPPER MINE POINT, VIRGIN GORDA, BRITISH WEST INDIES, by CH. A. RATTE ...............166
ENGINEERING BEHAVIOR OF SELECTED PUERTO RICAN OXISOLS AND ULTISOLS, by R. O. FISH, T. DEMIREL AND R.A. LOHNES..............166
TECTONICA DEL CARIBE -CARIBBEAN TECTONICS
TECTONIC POSITION OF ULTRAMAFIC BODIES OF CUBA, by A. L. KNIPPER Y R. CABRERA ..........167
ASPECTS OF ISLAND ARC EVOLUTION AND MAGMATISM IN THE CARIBBEAN: GEOCHEMISTRY OF SOME WEST INDIAN PLUTONIC AND VOl.CANIC ROCKS, by J. F. LEWIS AND B. M. GUNN ......................171
COMMENTS ON THE CEOLOGY OF NORTIIWESTERN TRINIDAD IN RELATION TO THE GEOLOGY OF PARIA, VENEZUELA, by H.C. POTTER..........178
OFIOLITAS DE SlQUlSIQUE Y RIO TOCUYO Y SUS RELACIONES CON LA FALLA DE OCA por A. BELLIZZIA, D. RODRICUEZ y M. GRATEROL ..........182
BREVES IDEAS SOBRE LA ESTRUCTURA DE LA FALLA DE OCA, VENEZUELA, por G. FEO-CODECIDO .........................................184
MAJOR FAULTING IN NORTHWESTERN VENEZUELA AND ITS RELATION TO GLOBAL TECTONICS, by E. VASQUEZ AND P. DICKEY ...............191
SPATIAL AND TEMPORAL VA RIATIONS OF POTASSIUM IN THE VOLCANIC ROCKS OF PUERTO RICO, by E. LIDIAK...........203
LATE PALEOZOIC OROGENY IN NORTHWESTERN GUATEMALA, by B. BURKHART AND R.E. CLEMONS........210
TECTONIC HISTORY OF MARACAIBO AND BARINAS BASINS by K.F. DALLMUS AND C.R. GRAVES.........214
THE CARIBBEAN RANGE CONSIDERED IN THE EUROPEAN CONCEPT OF GEOSYNCLINE, by P. BOWER ..................227
THE STRUCTURE AND METAMORPHISM OF THE SANTA MARTA AREA, COLOMBIA, S. A. by B. L. DOOLAN ................239
ANALISIS ESTRUCTURAL Y EVENTOS TECTONICOS DE LA PENINSULA DE MACANAO, MARGARITA, VENEZUELA, por M. VIGNALI ................241
SISTEMA MONTANOSO DEL CARIBE, BORDE SUR DE LA PLACA CARIBE. ¿ES UNA CORDILLERA ALOCTONA?, por A. BELLIZZIA ................247
PLATE TECTONIC EVOLUTION OF THE CARIBBEAN-CULF OF MEXICO REGION, by G. FREELAND AND R. S. DIETZ ...............259
COMPARISON DES CARACTERES STRUCTURAUX DE LA CORDILLERE CARAIBE ( VENEZUELA ) ET DE LA CORDILLERE MAGELLANIENNE ( CHILI - ARGENTINE ), par J. BUTTERLIN.......265
TECTONIC CONTRAST BETWEEN NORTHERN AND SOUTHERN PUERTO RICO, by W. MONROE ...................274
SEISMICITY AND PLATE TECTONICS OF THE EASTERN CARIBBEAN, by J. F. TOMBLIN ..............277
GEOLOGIC STRUCTURE OFF-SHORE NORTH-CENTRAL VENEZUELA, by G.PETER ......283
STRUCTURAL ANALYSIS OF THE CARIBBEAN EASTERN INTERIOR RANGE OF VENEZUELA, by E. E. MURANY .................................. 295
TECTONICS OF COLOMBIAN ANDES - A PROGRESS REPORT, by J. E. CASE ..........299
PETROLOGY AND STRUCTURAL GEOLOGY ALONG THE MOTAGUA FAULT
ZONE, GUATEMALA by D. SCHWARTZ ................................ 299
TECTONIC DEVELOPMENT OF PUERTO RICO AND ADJACENT AREAS, by M.D. TURNER.......300
GLOBAL TECTONICS OF THE CARIBBEAN AS DEDUCED FROM A PALEOMAGNETIC STUDY OF JAMAICA, by S. VINCENZ ...........300
TIIE TECTONIC FRAMEWORK OF THE SOUTHERN ANTILLES ( SCOTIA ARC ) . ITS POSSIBLE BEARING ON THE EVOLUTION OF THE ANTILLES by I.W.D. DALZIEL........300
THE CARIBBEAN SEA. A ZONE OF NORTH-SOUTH EXTENSION AND LEFT- LATERAL SHEAR, by M. BALL AND C. G. A. HARRISON .................301
TECTONIC ROTATIONS SUGGESTED BY PALEOMAGNETIC RESULTS FROM NORTHERN COLOMBIA, S. A., by W. D. MACDONALD AND N. D. OPDYKE .....301
THE VENEZUELAN ANDES, A BACKDOOR TO THE CARIBBEAN, by R. SHAGAM ......302
TECTONIC SIGNIFICANCE OF LA DESIRADE - POSSIBLE RELICT SEA FLOOR CRUST, by L. K. FINR, C. T. HARPER, J. J. STIPP AND F. NAGLE ....... 302 TECTONICS OF THE EASTERN CARIBBEAN MARGIN, by A. A. MEYERHOFF AND H. A. MEYERHOFF...........303
COLOMBlA BASIN MAGNETIC ANOMALIES, by E. CHRISTOFFERSON ..........303
SIGNIFICANCE OF POSSIBLE CRETACEOUS ISLAND ARC VOLCANISM IN THE VENEZUELA COAST RANGE, by C. C. MURRAY ................303
PETROLOGIA Y GEOQUIMICA-PETROLOGY AND GEOCHEMISTRY
A LATE (?) PALEOZOIC METAMORPHISM OF THE CENTRAL VENEZUELAN ANDES, by R. L. GRAUCH ........304
PARTLY WELDED PYROCLAST FLOW DEPOSITS IN DOMINICA, LESSER ANTILLES, by H. SIGURDSSON ....................307
ANALISIS DE SUPERFICIES DE TENDENCIA DE LOS PARAMETROS QUIMICOS Y MODALES DEL GRANITO DE GUAREMAL, EDO. CARABOBO, VENEZUELA, por F. URBANI P...........................313
GABBRO AND EPIDORITE VERSUS GRANULITE AND AMPHIBOLITE. A PROBLEM OF THE OPHIOLITE ASSEMBLAGE, by T. P. THAYER ..............315
CUERPOS MENORES DE SERPENTINITAS Y OTRAS ROCAS IGNEAS EN LA ZONA DE EL MAGUEY, PARTE NORORIENTAL DE LA PENINSULA DE MACANAO ( MARGARITA ), ESTADO NUEVA ESPARTA, por J. M. DE AROZENA.....321
EQUILIBRIO QUIMICO ENTRE GRANATE Y PIROXENO COEXISTENTES ROCAS ECLOGITICAS, MACANAO, ESTADO NUEVA ESPARTA, VENEZUELA, por E. NAVARRO ............327
PETROGENESIS DE LA PERIDOTITA DE LOMA DE HIERRO, ESTADO ARAGUA, por M. DE CRATEROL .............329
GEOLOGIA DEL COMPLEJO ULTRAMAFICO DE PARAGUANA, VENEZUELA,por C. MARTIN-RELLIZZIA Y J. M. DE AROZENA .................337
GEOCHEMISTRY AND MINERALOGY OF SEDIMENTS FROM NORTH LAGOON, BERMUDA, by F. R. SIEGEL, W. LUNKING, N. ROACH AND J. H. SCHROEDER ............357
SCLERACTINIAN CORALS: STRONTIUM AND ARAGONITE- WHY?, by F. R. SIEGEL...........360
MESOZOIC HIGH-P LOW-T METAMORPHISM ON ISLA MARGARITA, VENEZUELA AND ITS SIGNIFICANCE IN THE DEVELOPMENT OF THE VENEZUELAN COAST RANGES, by W.V. MARESCH .....................366.
GEOFISICA-GEOPHYSICS
SEISMIC REFLECTION PROFILES IN THE YUCATAN CHANNEL, by D. A. FAHLQUIST, J. W. ANTOINE, W. R. BRYANT, A. BOUMA AND T. PYLE .........367
EXPRESION TOPOGRAFICA DEL FONDO SUBMARINO FRENTE A LA GUAIRA Y SUS RELACIONES CON ALGUNOS TERREMOTOS, por S. E. AGUERREVERE............372
ACTIVITIES OF UNESCO AND THE INTERGOVERNMENTAL OCEANOGRAPHIC COMMISSION IN THE CARIBBEAN IN THE FIELD OF MARINE GEOLOGY AND GEOPHYSICS, by G. E. GIERMANN ..............375
INTERPRETATION OF HEAT FLOW AND SEISMIC PROFILES IN THE CAIMAN TROUGH AND YUCATAN BASIN, by E. J. ERICIKSON, C. E. HELSEY AND G. SIMMONS .............................379
PALEOMAGNETIC INVESTIGATIONS OF SELECTED LAVA UNITS ON PUERTO RICO, by L. K. FINK AND C. G. A. HARRISON ........................379
MARINE GEOPHYSICAL OBSERVATIONS ACROSS THE BARBADOS RIDGE - ST. LUCIA CROSS WARP, by B. G. BASSINGER AND G. H. KELLER ..........379
A SEISMIC-REFLECTION STUDY OF THE MUERTOS TROUGH SOUTH OF PUERTO RICO, by R. G. MARTIN AND L. E. GARRISSON ..................380
PLIOCENO-CUATERNARIO, GEOLOGIA MARINA-PLIOCENE QUATERNARY, MARINE GEOLOGY
THE HOLOCENE/PLEISTOCENE CONTACT IN THE OFFSHORE AREA EAST OF GALEOTA POINT, TRINIDAD, W. I. by R. CARR BROWN ............381
LA INFLUENCIA DE LOS PARAMETROS FISICO-QUIMICOS DEL FONDO EN LAS FACIES DE FORAMINIFEROS BENTONICOS, por J. M. SELLIER, DE CIVREUX Y BONILLA........398
MASS PHYSICAL PROPERTIES OF TOBAGO TROUGH SEDIMENTS, by G. H.KELLER, D. N. LAMBERT, R. H. BENNET AND J. B. RUCKER...............405
ROCKS FROM THE SEAMOUNTS AND ESCARPMENTS ON THE AVES RIDGE, by F. NAGLE......409
SEDIMENTOS DEL TERCIARIO SUPERIOR Y CUATERNARIO DE LA PENINSULA DE MACANAO, MARGARITA, VENEZUELA, por C. H GRAF ..........414
ECOLOGIC ANALYSIS AND FACIES DISTRIBUTION OF THE LECHERIASMANARE PLATFORM AREA, NORTHEASTERN VENEZUELA, by W. SCHERER AND O. MACSOTAY ...................418
SHALLOW WATER CARBONATES FROM THE PUERTO RICO TRENCH REGION, by N. S. SCIINEIDERMAN, J . P . BECICMANN AND B . C . HEEZEN ..........423
SOME ASPECTS OF THE MARINE QUATERNARY OF THE CARIBBEAN AREA, by H.G. RICHARDS............423
DEEP-SEA SEDIMENTATION AND CORRELATION OF STRATA OFF MAGDA- LENA RIVER AND IN BEATA STRAIT, by A. H. BOUMA, R. REZAK, J. W.ANTOINE, W. BBYANT AND D. A. FAHLQUIST ........................430
THE USE OF FORAMINIFERA AS INDICATORS OF SUBSIDENCE IN THE CARIBBEAN, by W. D. BOCK ...........439
PRELIMINARY RESULTS OF CRUISE 71-A-4 OF THE R/V ALAMINOS IN THE CARIBBEAN, by R. REZAK, J . W . ANTOINE, W . R . BRYANT, D. A. FAHLQUIST AND N. MALONEY
MARINE TERRACES OF EASTERN VENEZUELA, by J. MORELOCK, O. MACSOTAY AND A. N. BOUMA ...................450
PALEONTOLOGIA, ESTRATIGRAFIA- PALEONTOLOGY, STRATIGRAPHY
FOSSIL TINTINNIDS IN VENEZUELA, by M. A. FURRER .....................451
RECENT PALEONTOLOGICAL RESULTS FROM THE NORTHERN RANGE OF TRINIDAD by J.B. SAUNDERS ................455
EVOLUTION OF CENOZOIC CARIBBEAN CORAL FAUNAS, by S. FROST ........461
MOLLUSKS FROM THE WHITE LIMESTONE GROUP OF JAMAICA, by P. JUNG ..........465
AMMONITES FROM PUERTO RICO AND ST. THOMAS, by K. YOUNG .........469
A COLLECTION OF MOLLUSCS FROM ISLA DE AVES, VENEZUELA, by J. AND W. GIBSON-SMlTH .........470
CORRELACION ESTRATIGRAFIA DEL CARIBE-STRATIGRAPHIC CORRELATION OF THE CARIBBEAN AREA
CORRELATION OF SOME MARINE SEDIMENTARY UNITS OF THE CARIBBEAN ANTILLEAN PALEOPROVINCE, WITH ENDEMIC MOLLUSKAN TAXA by O. MACSTOTAY..........479
CONTRIBUTION OF OSTRACODA TO THE CORRELATION OF NEOGENE FOR MATIONS OF THE CARIBBEAN REGION, by W. A. VAN DEN BOLD......485
CUADRO SIPNOTICO DE UNIDADES ESTRATIGRAFICAS - NORTE DE VENEZUELA, por C. PETZALL ..............491
PROGRESS REPORT OF JAMAICAN STRATIGRAPHY, by E. ROBINSON ......491
PERFORACION EN AGUAS PROFUNDAS-DEEP SEA DRILLING
BIOSTRATIGRAPHIC RESULTS FROM DEEP-SEA DRILLING IN THE CARIBBEAN, by H. M. BOLLI, W. W. HAY, I. PREMOLI-SILVA AND W. N. RIEDEL ...... 492
LITHOLOGIES AND PHYSICAL PROPERTIES OF SEDIMENTS AND ROCKS RECOVERED FROM THE CARIBBEAN SEA DURING LEG XV OF THE DEEP SEA DRILLING PROJECT, by R. E. BOYCE, F. MAURRASSE, W. PRELL AND N. SCHNEIDERMANN ..................492
HISTORY OF CIRCUM-CARIBBEAN VOLCANIC ACTIVITY: RESULTS OF LEG XV DEEP SEA DRILLING PROJECT, by T. W. DONNELLY ...............492.
A GENERAL DISCUSSION OF THE RESULTS FROM LEG XV OF THE DEEP SEA DRILLING PROJECT IN THE CARIBBEAN SEA, by N. T. EDGAR AND J. B. SAUNDERS ....................493
INTERSTITIAL WATER CHEMISTRY OF SEDIMENTS IN THE CARIBBEAN AREA, by J. GIESKES AND W. BROECKER ................493