Transactions 4th Caribbean Geological Conference, Port of Spain, Trinidad

Transactions of the 4th Caribbean Geological Conference

Table of Contents

OPENlNG SPEECH by the Rt. Hon. Dr. Eric Williams, Prime Minister of Trinidad & Tobago vi

TALK ON THE DEVELOPMENT OF TnE CARIBBEAN GEOLOGICAL CONFERENCES
by Dr. P. H. A. Martin-Kaye vii

PROGRAMME OF EVENTS ix

MINUTES OF THE CLOSING SESSION ON 3RD APRIL xiv

LIST OF DELEGATES xviii

PAPERS AND ABSTRACTS:

1. An Outline of the Geology of Trinidad-K. W. Barr and J. B. Saunders 1

2. Sedimentary Volcanism-H. G. Kugler 11

3 Report on the 1964 Chatham Mud Island, South Trinidad-
G. E. Higgins and J. B. Saunders (abstract only) 14

4. A Preliminary Account of the Stratigraphy and Structure of the Eastern part of the Northern Range, Trinidad-H. C. Potter 15

5. Paleontology of some Limestones and Calcphyllites of the Northern Range of Trinidad, West Indies-
M. A. Furrer 21

6. On the Geology of Eastern Paria (Venezuela)-
Clemente Gonzalez de Juana, Nicolas Gerardo Munoz J., Mario Vignali C. 25

7. Clues in Venezuela to the Geology of Trinidad, and vice versa-
Amos Salvador and R. M. Stainforth 31

8. A Review of Trinidad, West Indies, Oil Development and the Accumulations at
Soldado Brighton Marine, Grande Ravine. Barrackpore-Penal and Guayaguayare -
K. Ablewhite and G. E. Higgins 41

9. Geology of Texaco Forest Reserve Field, Trinidad, W.I.-
T. H. Bower. With Biostratigraphic Notes-V. F. Hunter 75

10. The Los Bajos Fault-C. C. Wilson (written contribution) 87

11. The Geology of the Herrera Sands in the Moruga West Oilfield of South Trinidad
-H. P. Jones 91

12. Some Sedimentary Features of the Herrera Sands of the Clarke Road Area,
Barrackpore Oilfield, Trinidad, West Indies-W. G. Poole 101

13. Miocene Turbidites in the Carapita Formation of Eastern Venezuela-
James L. Lamb and John A. Sulek 111

14. Sedimentology of a Section in the Upper Morne L'Enfer Formation, Guapo Bay, Trinidad-
J. B. Saunders and J. E. Kennedy 121

15. Palaeoecology of Foraminiferal Assemblages in the Late Miocene Cruse and Forest
Formations of Trinidad, Antilles-D. A. J. Batjes 141

16. Eaglefordian (Cenomanian-Turonian) Stratigraphy in Mexico, Texas, and the West Indies
-E. A. Pessagno, Jr. (abstract only) 157

17. The Phylogeny and Biometrics of the Globotruncana ~tuarti lineage Group-
E. A. Pessagno, Jr. (abstract only) 157

18. Considerations Regarding the Middle Miocene to Recent Sediments of the Coast of Venezuela-P. J. Bermudez (abstract only) 158

19. The Oligo-Miocene Boundary in the Marine Tertiary of Colombia-H. Burgl (abstract only) 158

20. Mid-Tertiary Diastrophism in Northern South America-R. M. Stainforth 159

21. Written Comments on "Mid-Tertiary Diastrophism in Northern South America" by R. M. Stainforth-W. H. Blow, F. E. Eames, W. J. Clarke and F. T. Banner (written contribution) 175

22 The Biostratigraphy of thc Oceanic Formation in the Bath Cliff Section, Barbados -J.B. Saunders and W. G. Cordey 179

23. Donnees Fournies par les Macroforaminiferes pour L'Establissement de Limites de L'Oligocene dans la Region des Caraibes-Jacques Butterlin 183

24. Stratigraphic Ranges of some Larger Foraminifera in Jamaica-E. Robinson 189

25. Progress Report on thc Study of Post-Eocene Ostracoda of thc Caribbean- W. A. van den Bold 195

26. Type Locality of Globorotalia fohsi-
E. Ann Butler, H. M. Bolli, W. A. van den Bold and J. B. Saunders 201

27. The Upper Crctaceous Inoceramus of Puerto Rico-Erle G. Kauffman 203

28. New and Rare Foraminifera from Los Testigos Reefs, Venezuela-G. A. Seiglie (abstract only) 219

29. Notes on Three Subspecies of Lepidoyclina from Cuba-G. A. Seiglie (abstract only) 219

30. Observations on Rotaliform Foraminifer:l with Supplementary Chambers or similar Structures-G. A. Seiglie and P. J. Bermudez (abstract only) 219

31. Chemical Petrology of the Virgin Islands Batholith: A Preliminary Analysis- J. D. Longshore and T. W. Donnelly 221

32. Geologic History of the Landward Extension of the Bartlett Trough-some Preliminary Notes-T. W. Donnelly, D. Crane and B. Burkart 225

33. Parguera Limestone, Upper Cretaceous Mayaguez Group, South-western Puerto Rico-Charles C. Almy, Jr. 229

34 The Geologic History of Puerto Rico-R. P. Briggs (abstract only) 234

35. A Decade of 1:20,000 scalc Geologic Mapping, in Puerto Rico-Progress to date and Work Remaining-R. P. Briggs (abstract only) 234

36. Geology and Hydrology of thc Tallaboa-Guayanilla-Ynuco Area, Southwestcrn Puerto Rico-1. G. Grossman (abstract only) 234

37. Trends of Cretaceous Volcanism in North-Central Puerto Rico-A. E. Nelson 235

38. Terraces in Western Puerto Rico- J. D. Weaver 243

39. Metamorphism of the Major Paragneiss of the PreCambrian Imataca Complex:
Upata Quadrangle, State of Bolivar, Venezuela-G. de Ratmiroff (abstract only) 246

40. Structural Geology of the Tinaco Arca; Overthrusting in the Serrania del
Interior of Central Venezuela-A. Menendez (abstract only) 246

41. The Santa Marta Wrench Fault of Colombia and its Regional Setting-C. .J. Campbell 247

42 The Santa Marta Wrench Fault: A Rebuttal-
I. L. Polson and Diego Henao (written contribution) 263

43. Geology of the Serrania de Macuira Area, Guajira Peninsula, Northeast Colombia --William D. MacDonald . . . . . . . . . . . 267.

44. Stratigraphic and Geologic History of Extreme Northeastern Serrania del Interior, State of Sucre. Venezuela-Harold L. Metz . . . . . . 275

45. Geology of the El Pilar Fault Zone, State of Sucre, Venezuela-Harold L. Metz 293

46. Geology of the Benbow Inlier and Surrounding Areas, Jamaica-
Kevin Burke, A. G. Coates and E. Robinson 299

47. The Geology of the Cretaceous Central Inlier around Arthurs Seat, Clarendon, Jamaica-
A. G. Coates . . . . . . . . . . . 309

48. Sediment Distribution in the Caribbcan Sea John Ewing, Manik Talwani and
Maurice Ewing . . . . . . . . . . . . 317

49. The Sediments and Topography of the Puerto Rico Trench and outer Ridge-
Maurice Ewing, Alberto G. Lonardi and John I. Ewing . . . . . .325

50. The Hydrography and Sediments of the Gulf of Darien-
J. M. Zeigler and W.D. Athearn . . . . . . . . . . . . . 335

51. Magdalena Turbiditcs in Decr)-Sea Sedimcllts-B. C. Heezcn and N. G. Munoz J.(abstract only) . . . . . . . . . . . . 344

52. Pleistocene Geology of the Shelf off Kingston Harbour, Jamaica-
T. Goreau and K. C. Burke (abstract only) . . . . . . . . . . 342

53. Sedimcnt Cores from thc Cariaco Trcnch, Venezuela-W. D. Athearn . . 343

54. Stratigraphy and Paleogeography of Upper Cretaceous and Tertiary Sediments in Southern Costa Rica-
D. W. Henningsen . . . . . . . 353

55. Volcanocs nnd Volcanic Rocks in Central America and thc West Indics-
Richard Weyl . . . . . . . . . . . . . 357

56. The Geology of Mt. Misery Volcano, St. Kitts-P. E. Baker . . . . 361

57. The Pyroclastic Deposits of the 190~ and 1903 Eruptions of thc Soufriere of St.Vincent-
G. R. Robson (abstract only) . . . . . . . 36/i

58. The Origin of thc Ejectedl Plutonic Blocks of the Soufriere, St. Vincent-
J. F. Lewis (abstract only) . . . . . . . . . . . 366

59. Thc Volcanic History and Petrology of the Soufriere Region, St. Lucia J. F. Tomblin 367.

60. Presentation de la Carte Geologique de la Martinique-H. Grunevald 377

61. A Note on the Magnetic Properties of some Volcanic Rocks from the
Island of St.Vincent, West Indies-M. A. Khan . . . . . . . . . 381

62. The Mineralogy and Petrology of Ne- is, Lee~vard Islands,
British West Indies -C. Osborne Hutton 383

63. Thc Above Rocks Granodiorite, Jamaica-~. J. Reed . . . . . 389

64. Chemical Variations in a Volcanic Rock Suite, Puerto Rico-
. H. Mattson and A. E. Nelson (Abstract only) 394

65. The Occurrence of Sillimanite and its Status as an Index of Metamorphic
Grade in Guyana Shield Rocks of Southern British Guiana-S. Singh 395

66. Mineralogy of the Fine Sediments of Western Venezuela-Mnnuel Rivero P. (abstract only) 400

67. Dynamic Barriers and their Influence on Chenier Formation-T. W. Todd (abstract only) 400

68. The Continuous Dipmeter Survey: An Aid to Subsurface Geology-H. A. Salisch and H. D. Brown (abstract only) 400

69. Minor Folding in the Manganese Deposits in Mattllews Ridge Northwest District,
British Guiana-L. L. Fernandes 401

70. A Study of Gold Mineralization in Central British Guiana-J. W. Carter . 407

71. Recent Developments in the Diamond 31ining Industry in British Guiana- L. L. Fernandes 415

72. Geochemical Drainage Reconnaissance Surveys over Rocks of Barama-Mazaruni Assemblage
in Cuyuni River Basin, British Guiana-G. Harden 419

EXCURSION GUIDES:

1. No. 1 Manzanilla Coast-J. B. Saunders 427

2. No. 2 Eastern Northern Range and Toco District-K. W. Barr 430

3. No. 3 Paleontological Collecting Trip J. B. Saunders and M. C. Cater 433

4. No. 4 Western Central Range-G. E. Higgins and J. B. Saunders 435

5. No. 6A South Trinidad- M. H. S. Barker and K. H. Roberts 435

6. Barbados-J. B. Saunders 443

7. St. Lucia-J. F. Tomblin 451

8. St. Vincent-G. R. Robson 454