The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and ... more The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment's content of particulate organic matter. A weaker 'proto-monsoon' existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic
Papers in the Earth and Atmospheric Sciences ... James A. Austin Jr., University of Texas at Aust... more Papers in the Earth and Atmospheric Sciences ... James A. Austin Jr., University of Texas at Austin Wolfgang Schlager, Vrije Universiteit, Instituut v. Aardwetenschap-pen Amanda A. Palmer, Texas A & M University - College Station Paul A. Comet, Core Labs Singapore ...
... Environment..... 5 Kelly L. Bergman, Hildegard Westphal, Xavier Janson, Anthony Poiriez, and ... more ... Environment..... 5 Kelly L. Bergman, Hildegard Westphal, Xavier Janson, Anthony Poiriez, and Gregor P. Eberli 3 Belize: A Modern Example of a Mixed Carbonate-Siliciclastic Shelf..... 81 ...
... analyses through neural networks of the quantified pore parameters using permeability confirm... more ... analyses through neural networks of the quantified pore parameters using permeability confirm ... Rock-fabric/petrophysical classification of carbonate pore space for reservoir characterization: AAPG Bulletin, v ... R. Ehrlich, and SJ Crabtree, 1991, Petrography and reservoir physics II ...
Proceedings of the Ocean Drilling Program Scientific Results, 2000
Page 1. Swart, PK, Eberli, GP, Malone, MJ, and Sarg, JF (Eds.), 2000 Proceedings of the Ocean Dri... more Page 1. Swart, PK, Eberli, GP, Malone, MJ, and Sarg, JF (Eds.), 2000 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 166 167 16. THE RECORD OF NEOGENE SEA-LEVEL CHANGES IN THE PROGRADING ...
Recognizing the importance of sea level change in shaping near shore and open ocean environments,... more Recognizing the importance of sea level change in shaping near shore and open ocean environments, the Ocean Drilling Program (ODP) devoted numerous legs to the study of eustatic sea level and to how these changes are recorded in sediments from various depositional settings. Three ODP legs (133, 166, 194) utilized a series of holes to examine the sedimentary records from carbonate platform-to-basin transects to gain a better understanding of Neogene sea level variations. Because carbonate platforms are constructed by organisms that are sensitive to changes in environmental conditions such as water depth (sea level), the dominant energy regime (wind or currents), nutrient content, and water temperature, the study of sediments shed from carbonate platforms provides fundamental information regarding past environmental change. Unconformities and varying depositional regimes between sea level high- and lowstands allow sea level changes to be imaged on seismic data by series of unconformity-bounded seismic sequences. A synthesis of sequence stratigraphic results from Legs 133, 166, and 194 clearly demonstrates chronostratigraphic significance of prominent unconformity surfaces that produce seismic sequence boundaries on the margins in both the Atlantic and Pacific Oceans. The timing of many of these unconformities is remarkably similar in both oceans, indicating a strong eustatic control on their development. The timing of these sequences also correlates well with major shifts in stable oxygen isotopes, which are primarily controlled by changes in ice volume and thus are an excellent proxy for eustatic sea level variability. Between the three locations studied, 15 (Leg 133), 17 (Leg 166), and 13 (Leg 194) Neogene sequences are identified. Their sequence boundaries dated by correlating them seismically to the conformable successions in drilling locations distal to the carbonate platform complexes, where more quiescent conditions and reduced diagenesis help maintain a continuous depositional history through time. 10 of the sequence boundaries display, within the seismic and biostratigraphic resolution, the same ages in all transects, documenting the synchrony of unconformities that are caused by relative sea level changes. In addition, stratigraphic relationships and biostratigraphic information from Leg 194 provide evidence that the magnitude of the late middle Miocene eustatic fall was 86ñ30 m. This data provides an important calibration point for the global sea level curve and is similar to those derived from other proxies, such as oxygen isotopes, yet is greater than the magnitudes estimated from sediment sequences of siliciclastic margins (e.g. ODP Leg 150).
Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program... more Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program (ODP) Leg 166 along a transect from the top of Great Bahama Bank to the basin in the Straits of Florida provide a unique data set to test the assumption in seismic stratigraphy that seismic reflections are time lines and, thus, have a chronostratigraphic significance. Seismic
The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and ... more The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment's content of particulate organic matter. A weaker 'proto-monsoon' existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic
Papers in the Earth and Atmospheric Sciences ... James A. Austin Jr., University of Texas at Aust... more Papers in the Earth and Atmospheric Sciences ... James A. Austin Jr., University of Texas at Austin Wolfgang Schlager, Vrije Universiteit, Instituut v. Aardwetenschap-pen Amanda A. Palmer, Texas A & M University - College Station Paul A. Comet, Core Labs Singapore ...
... Environment..... 5 Kelly L. Bergman, Hildegard Westphal, Xavier Janson, Anthony Poiriez, and ... more ... Environment..... 5 Kelly L. Bergman, Hildegard Westphal, Xavier Janson, Anthony Poiriez, and Gregor P. Eberli 3 Belize: A Modern Example of a Mixed Carbonate-Siliciclastic Shelf..... 81 ...
... analyses through neural networks of the quantified pore parameters using permeability confirm... more ... analyses through neural networks of the quantified pore parameters using permeability confirm ... Rock-fabric/petrophysical classification of carbonate pore space for reservoir characterization: AAPG Bulletin, v ... R. Ehrlich, and SJ Crabtree, 1991, Petrography and reservoir physics II ...
Proceedings of the Ocean Drilling Program Scientific Results, 2000
Page 1. Swart, PK, Eberli, GP, Malone, MJ, and Sarg, JF (Eds.), 2000 Proceedings of the Ocean Dri... more Page 1. Swart, PK, Eberli, GP, Malone, MJ, and Sarg, JF (Eds.), 2000 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 166 167 16. THE RECORD OF NEOGENE SEA-LEVEL CHANGES IN THE PROGRADING ...
Recognizing the importance of sea level change in shaping near shore and open ocean environments,... more Recognizing the importance of sea level change in shaping near shore and open ocean environments, the Ocean Drilling Program (ODP) devoted numerous legs to the study of eustatic sea level and to how these changes are recorded in sediments from various depositional settings. Three ODP legs (133, 166, 194) utilized a series of holes to examine the sedimentary records from carbonate platform-to-basin transects to gain a better understanding of Neogene sea level variations. Because carbonate platforms are constructed by organisms that are sensitive to changes in environmental conditions such as water depth (sea level), the dominant energy regime (wind or currents), nutrient content, and water temperature, the study of sediments shed from carbonate platforms provides fundamental information regarding past environmental change. Unconformities and varying depositional regimes between sea level high- and lowstands allow sea level changes to be imaged on seismic data by series of unconformity-bounded seismic sequences. A synthesis of sequence stratigraphic results from Legs 133, 166, and 194 clearly demonstrates chronostratigraphic significance of prominent unconformity surfaces that produce seismic sequence boundaries on the margins in both the Atlantic and Pacific Oceans. The timing of many of these unconformities is remarkably similar in both oceans, indicating a strong eustatic control on their development. The timing of these sequences also correlates well with major shifts in stable oxygen isotopes, which are primarily controlled by changes in ice volume and thus are an excellent proxy for eustatic sea level variability. Between the three locations studied, 15 (Leg 133), 17 (Leg 166), and 13 (Leg 194) Neogene sequences are identified. Their sequence boundaries dated by correlating them seismically to the conformable successions in drilling locations distal to the carbonate platform complexes, where more quiescent conditions and reduced diagenesis help maintain a continuous depositional history through time. 10 of the sequence boundaries display, within the seismic and biostratigraphic resolution, the same ages in all transects, documenting the synchrony of unconformities that are caused by relative sea level changes. In addition, stratigraphic relationships and biostratigraphic information from Leg 194 provide evidence that the magnitude of the late middle Miocene eustatic fall was 86ñ30 m. This data provides an important calibration point for the global sea level curve and is similar to those derived from other proxies, such as oxygen isotopes, yet is greater than the magnitudes estimated from sediment sequences of siliciclastic margins (e.g. ODP Leg 150).
Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program... more Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program (ODP) Leg 166 along a transect from the top of Great Bahama Bank to the basin in the Straits of Florida provide a unique data set to test the assumption in seismic stratigraphy that seismic reflections are time lines and, thus, have a chronostratigraphic significance. Seismic
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