Copyright by Nysha Chaderton 2009 - The University of Texas at ...

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Figure 4.8: Isochron maps of the Lower Miocene to Plio-Pleistocene Tobago Basin fill. A. The Lower Miocene to Middle Miocene TFB fill is relatively thin. The thickest portion is preserved in the southwestern corner of the TFB. B. The Upper Miocene fill is almost identical in morphology to the underlying unit. The Pliocene to Pleistocene fill is concentrated in a narrow depocenter in the southwestern portion of the basin. The depocenter is constrained on its eastern margin by the Inner Forearc Deformation Front that is shown in Figures 4.3 and 4.5. Seismic reflection profiles used to produce these isochron maps are located inside the green box in Figure 4.1. 143
Figure 4.9: Illustration of the Speed model of tectonic emplacement of the Oceanic Formation (Tobago Forearc Basin sediments) onto accretionary prism sediments. 144
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Copyright by Nysha Chaderton 2009
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Sedimentation within the Tobago For
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Acknowledgements I would like to th
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Table of Contents List of Tables ..
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List of Tables Table 2.1: Latitudes
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Figure 2.14: Planar parallel lamina
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Figure 2.42: Coarse, cobble and peb
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Figure A.3a: Chalky Mount Ridge mea
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1. Development history of the south
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Formation. This interpretation requ
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DATA AND METHODOLOGY Extensive work
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DESCRIPTIVE METHODOLOGY Each sectio
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Two or more channel complexes stack
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These poorly sorted sands are later
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East Coast Road Although the East C
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succession of interlaminated siltst
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Mount All The beds of the Mount All
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Lobes are non-channelized bodies, 3
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Sandy units are the most resistant
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SUMMARY DEPOSITIONAL SETTING OF THE
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Chapter Three: Petrographic Analysi
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had not been buried deeply or long
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Feldspars Calcium Plagioclase Felds
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Authigenic Minerals Authigenic mine
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amounts of chlorite and kaolinite c
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Sample: WRA 16 This sample was take
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cementation is observed. A number o
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COMPARISON WITH PREVIOUS WORK Punch
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K feldspar preservation to slightly
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CONCLUSIONS 1. No quartz cementatio
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The highest point of the island, is
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STRATIGRAPHIC FRAMEWORK ONSHORE TO
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STRUCTURAL FRAMEWORK OF THE BARBADO
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Sandy material is primarily quartz
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esult of extension caused by flexur
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1994). The origin of the Oceanic Fo
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Oligocene-age sediments are deposit
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The observation of channel geometri
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Pudsey, (1982) interpreted smectite
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The interpretation of the Scotland
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Figure 1.2: Convergent margins arou
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NSF Study Lines Grenada St. Kitts S
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Figure 2.2: Generalized vertical se
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Figure 2.4: Detailed Geological map
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Figure 2.6: Photographs and illustr
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Figure 2.8: Bedsets on the channel
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S 50 m Figure 2.10: Photo-panorama
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Figure 2.13: Laminated silt and mud
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Figure 2.16a: Measured section at C
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Figure 2.16c: Measured section at C
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Figure 2.18: Correlation of section
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Figure 2.21: Parallel laminated sil
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Wach, Vincent and Chaderton March 2
Page 107 and 108: Wach, Vincent and Chaderton March 2
Page 109 and 110: Wach, Vincent and Chaderton March 2
Page 111 and 112: Figure 2.24: Channel element identi
Page 113 and 114: WRB S N Fresh rock face exposed by
Page 115 and 116: Figure 2.28: Photograph of Diplocra
Page 117 and 118: Figure 2.31: Conglomerate with eros
Page 119 and 120: Figure 2.33: Thalassinoides trace f
Page 121 and 122: Figure 2.35: Mount All measured str
Page 123 and 124: Figure 2.37: Medium grained sand be
Page 125 and 126: Figure 2.38b: Inner Turner’s Hall
Page 127 and 128: Figure 2.38d: Inner Turner’s Hall
Page 129 and 130: Figure 2.39: Spa Hill measured stra
Page 131 and 132: Juniper Ridge, California Scotland
Page 133 and 134: Figure 3.1: Fractured quartz grain
Page 135 and 136: SGRF 1C SGRF 9C Figure 3.5: Measure
Page 137 and 138: Figure 3.8: Photo of sample SGRF 11
Page 139 and 140: Figure 3.10: Photo of sample SGRF 1
Page 141 and 142: Figure 3.12: Photo of sample WRA 16
Page 143 and 144: Figure 3.14: Photo of sample WRB 8
Page 145 and 146: Figure 3.16: Photo of sample ITR 9
Page 147 and 148: Figure 3.19: Photo of sample CMRA s
Page 149 and 150: Figure 3. 23: Composition of Scotla
Page 151 and 152: Figure 4.1: Base map showing seismi
Page 153 and 154: Figure 4.3: Channels within Unit Fi
Page 155 and 156: Figure 4.5: Seismic reflection prof
Page 157: Figure 4.7 Isochron maps of the old
Page 161 and 162: Figure 4.11: Illustration of Hypoth
Page 163 and 164: necessary to clear a path. Keep to
Page 165 and 166: 2006 Figure A.2a: Lidar Ridge measu
Page 167 and 168: Figure A.3b: Chalky Mount Ridge mea
Page 169 and 170: 2006 Figure A.4a: Chalky Mount Ridg
Page 171 and 172: 2006 Figure A.4c: Chalky Mount Ridg
Page 173 and 174: 2006 Figure A.6: Chalky Mount Ridge
Page 175 and 176: Figure A.7b: Measured Section of Ch
Page 177 and 178: 2006 Figure A.8a: Sleeping Giant Ri
Page 179 and 180: 2006 Figure A.9: Sleeping Giant Rid
Page 181 and 182: 2006 Figure A.11: Sleeping Giant Ri
Page 183 and 184: Figure A.13a: Sleeping Giant Ridge
Page 185 and 186: 2006 Figure A.14a: Coast Road Below
Page 187 and 188: 2006 Figure A.14c: Coast Road Below
Page 189 and 190: 2006 Figure A.14e: Coast Road Below
Page 191 and 192: 2006 Figure A.14g: Coast Road Below
Page 193 and 194: 2006 Figure A.15: Ermy Bourne Ridge
Page 195 and 196: 2006 Figure A.17: Spa Hill Fold Mea
Page 197 and 198: 2006 Figure A.19: Ermy Bourne Ridge
Page 199 and 200: Figure A.20b: Walkers Ridge Measure
Page 201 and 202: Figure A.21: Walkers Ridge Measured
Page 203 and 204: Figure A.22b: Walkers Ridge Measure
Page 205 and 206: 2007 Figure A.23b: Inner Turner’s
Page 207 and 208: 2007 Figure A.23d: Inner Turner’s
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Framework grains Quartz Feldspar Ro
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CRIMES, T.P., 1977, Trace fossils o
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MONTGOMERY, S.L., BARKER, C.E., SEA
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RICHARDS, M., BOWMAN, M., and READI
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WEBER, J.C., DIXON, T.H., DEMETS, C
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