... Geology and structure of the area around Naswadi with special reference to Bagh Bed exposures... more ... Geology and structure of the area around Naswadi with special reference to Bagh Bed exposures, Baroda district, Gujarat = Géologie et structure de la zone aux environs de Naswadi avec référence à la formation de Bagh Bed, District Baroda, Gujarat. ... Fracturing. ; Bagh Beds. ; ...
Analyses of a fluvial sedimentary sequence from the lower reaches of the Narmada River establish ... more Analyses of a fluvial sedimentary sequence from the lower reaches of the Narmada River establish a record of rhythmic cycles of sediment facies that represent floods during the late Holocene. The south-west Indian monsoon strongly influences the study area, and heavy rainfall or cyclones which originate from either the Bay of Bengal or the Arabian Sea, also affect the region. Optically stimulated luminescence dating places the 8 m thick sediment sequence in the climate transition phase which ranges from the Medieval Warm Period to the Little Ice Age. Multi-proxy analyses including high-resolution granulometry, magnetic susceptibility, ferromagnetic mineral concentration, facies major oxide geochemistry, and micro-fossil records (from two sedimentary units) are used to study these late Holocene flood events. The latter are characterised by multiple sediment facies, depositional events, changes in channel morphology, and distinctive flood signatures. Integration of these records enabl...
In this paper, we use fractal dimensional analysis to investigate the Indian climatic dynamics. W... more In this paper, we use fractal dimensional analysis to investigate the Indian climatic dynamics. We analyze time series data of three major dynamic components of the climate––temperature, pressure and precipitation. We study how climate variability changes from month to month and from one season to the other. We also investigate variability both at a local level (for individual stations) and at a regional level (for groups of stations). Our studies suggest that regional climatic models typically would not be able to predict local climate since they deal with averaged quantities. We find an interesting effect that precipitation during the south-west monsoon is affected by temperature and pressure variability during the preceding winter. Ó 2003 Elsevier Ltd. All rights reserved. 1.
In this letter, a climate predictability index is proposed. It quantifies the predictability of t... more In this letter, a climate predictability index is proposed. It quantifies the predictability of three major components comprising the climate temperature , pressure and precipitation. The quantification is done using a fractal dimensional analysis of the corresponding time series. The climate predictability index is calculated for 25 stations spread throughout In-dia using the Global Historical Climatology Network dataset. Change in the index with the seasons suggests a strong influence of more than one climatic dynamics. In such cases, calculations done using mean yearly data are suspect. The index is shown to be useful in studying the interplay between various climatic components (viz. temperature, pressure and precipitation). Changes in predictability indices for temperature and pressure are seen to affect the index for precipitation. The index can be used as a discriminant for determining which stations are selected for use in developing regional climatic models.
12 . These characters are found in J. curcas. Th e flowers provide easy access to the foragers. T... more 12 . These characters are found in J. curcas. Th e flowers provide easy access to the foragers. They pr o- duce copious amount of pollen at inflorescence level. The pollen placed in two tiers of stamens, advertises its exi s- tence. Further, nectar secreted in traces at the shallow flower base glitters against sunlight and advertises its existence to
"A high resolution quantitative granulometric record for site Uchediya [... more "A high resolution quantitative granulometric record for site Uchediya [21°43'2.22" N, 73° 6'26.22" E; 10 m a. s. l.] gives understanding towards accretion history of the late Holocene flood plain in the lower reaches of Narmada River. Two sediment facies (sandy and muddy) and seven subfacies (sandy subfacies: StMS+FS+CS, SmFS+MS, SlFS+VFS, and StMS + CS; muddy subfacies: FmSILT+VFS+FS, FmSILT+VFS+FS (O) and FmSILT+VFS+FS (T)) are identified based on cluster analysis supplemented with sedimentary structures observed in field and other laboratory data. Changes in hydrodynamics are further deduced based on various sedimentological parameters and their ratios leading to arrive at a depositional model."
A sedimentary succession from Anjar sandwiched between basaltic flows records what transpired as ... more A sedimentary succession from Anjar sandwiched between basaltic flows records what transpired as continental India passed from Cretaceous to Tertiary times in the immediate vicinity of the Deccan Trap Province. The deposits consist of interlayered peloidal cherty limestones and shales. The shales are dominated by the mineral sepiolite. Chert occurs as three varieties. These include an amorphous cement, microcrystalline quartz
... Mahi and Sabarmati have led to significant progress in understanding various features ofQuate... more ... Mahi and Sabarmati have led to significant progress in understanding various features ofQuaternary sediments. ... 2003) have explained aeolian sediments and respective climatic events by studying dunes from ... Response of climate change at Guliya ice core was also recorded in ...
Rapid oscillations in the intensity of the Southwest Indian monsoon during the last glacial phase... more Rapid oscillations in the intensity of the Southwest Indian monsoon during the last glacial phase have been inferred for the first time, from newly generated continental records from the site of Bhimpura, located in the Mahi river flood plain in the tropical semi-arid ...
... Geology and structure of the area around Naswadi with special reference to Bagh Bed exposures... more ... Geology and structure of the area around Naswadi with special reference to Bagh Bed exposures, Baroda district, Gujarat = Géologie et structure de la zone aux environs de Naswadi avec référence à la formation de Bagh Bed, District Baroda, Gujarat. ... Fracturing. ; Bagh Beds. ; ...
Analyses of a fluvial sedimentary sequence from the lower reaches of the Narmada River establish ... more Analyses of a fluvial sedimentary sequence from the lower reaches of the Narmada River establish a record of rhythmic cycles of sediment facies that represent floods during the late Holocene. The south-west Indian monsoon strongly influences the study area, and heavy rainfall or cyclones which originate from either the Bay of Bengal or the Arabian Sea, also affect the region. Optically stimulated luminescence dating places the 8 m thick sediment sequence in the climate transition phase which ranges from the Medieval Warm Period to the Little Ice Age. Multi-proxy analyses including high-resolution granulometry, magnetic susceptibility, ferromagnetic mineral concentration, facies major oxide geochemistry, and micro-fossil records (from two sedimentary units) are used to study these late Holocene flood events. The latter are characterised by multiple sediment facies, depositional events, changes in channel morphology, and distinctive flood signatures. Integration of these records enabl...
In this paper, we use fractal dimensional analysis to investigate the Indian climatic dynamics. W... more In this paper, we use fractal dimensional analysis to investigate the Indian climatic dynamics. We analyze time series data of three major dynamic components of the climate––temperature, pressure and precipitation. We study how climate variability changes from month to month and from one season to the other. We also investigate variability both at a local level (for individual stations) and at a regional level (for groups of stations). Our studies suggest that regional climatic models typically would not be able to predict local climate since they deal with averaged quantities. We find an interesting effect that precipitation during the south-west monsoon is affected by temperature and pressure variability during the preceding winter. Ó 2003 Elsevier Ltd. All rights reserved. 1.
In this letter, a climate predictability index is proposed. It quantifies the predictability of t... more In this letter, a climate predictability index is proposed. It quantifies the predictability of three major components comprising the climate temperature , pressure and precipitation. The quantification is done using a fractal dimensional analysis of the corresponding time series. The climate predictability index is calculated for 25 stations spread throughout In-dia using the Global Historical Climatology Network dataset. Change in the index with the seasons suggests a strong influence of more than one climatic dynamics. In such cases, calculations done using mean yearly data are suspect. The index is shown to be useful in studying the interplay between various climatic components (viz. temperature, pressure and precipitation). Changes in predictability indices for temperature and pressure are seen to affect the index for precipitation. The index can be used as a discriminant for determining which stations are selected for use in developing regional climatic models.
12 . These characters are found in J. curcas. Th e flowers provide easy access to the foragers. T... more 12 . These characters are found in J. curcas. Th e flowers provide easy access to the foragers. They pr o- duce copious amount of pollen at inflorescence level. The pollen placed in two tiers of stamens, advertises its exi s- tence. Further, nectar secreted in traces at the shallow flower base glitters against sunlight and advertises its existence to
"A high resolution quantitative granulometric record for site Uchediya [... more "A high resolution quantitative granulometric record for site Uchediya [21°43'2.22" N, 73° 6'26.22" E; 10 m a. s. l.] gives understanding towards accretion history of the late Holocene flood plain in the lower reaches of Narmada River. Two sediment facies (sandy and muddy) and seven subfacies (sandy subfacies: StMS+FS+CS, SmFS+MS, SlFS+VFS, and StMS + CS; muddy subfacies: FmSILT+VFS+FS, FmSILT+VFS+FS (O) and FmSILT+VFS+FS (T)) are identified based on cluster analysis supplemented with sedimentary structures observed in field and other laboratory data. Changes in hydrodynamics are further deduced based on various sedimentological parameters and their ratios leading to arrive at a depositional model."
A sedimentary succession from Anjar sandwiched between basaltic flows records what transpired as ... more A sedimentary succession from Anjar sandwiched between basaltic flows records what transpired as continental India passed from Cretaceous to Tertiary times in the immediate vicinity of the Deccan Trap Province. The deposits consist of interlayered peloidal cherty limestones and shales. The shales are dominated by the mineral sepiolite. Chert occurs as three varieties. These include an amorphous cement, microcrystalline quartz
... Mahi and Sabarmati have led to significant progress in understanding various features ofQuate... more ... Mahi and Sabarmati have led to significant progress in understanding various features ofQuaternary sediments. ... 2003) have explained aeolian sediments and respective climatic events by studying dunes from ... Response of climate change at Guliya ice core was also recorded in ...
Rapid oscillations in the intensity of the Southwest Indian monsoon during the last glacial phase... more Rapid oscillations in the intensity of the Southwest Indian monsoon during the last glacial phase have been inferred for the first time, from newly generated continental records from the site of Bhimpura, located in the Mahi river flood plain in the tropical semi-arid ...
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Papers by Dhananjay A Sant