CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION
Analysis of the foraminiferal assemblages of the Chari Formation (Middle-Upper Jurassic transition) exposed at Ler Dome, Kutch Basin (India) allows one to interpret the incidence of different environmental parameters, especially the effect of sea-level changes in this group of microorganisms. The ov...
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| Format: | Article |
| Language: | English |
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Milano University Press
2020-04-01
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| Series: | Rivista Italiana di Paleontologia e Stratigrafia |
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| Online Access: | https://riviste.unimi.it/index.php/RIPS/article/view/13276 |
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| author | SYED MD. WASIM MATIAS REOLID ABU TALIB SHABBER HABIB ALVI |
| author_facet | SYED MD. WASIM MATIAS REOLID ABU TALIB SHABBER HABIB ALVI |
| author_sort | SYED MD. WASIM |
| collection | DOAJ |
| description | Analysis of the foraminiferal assemblages of the Chari Formation (Middle-Upper Jurassic transition) exposed at Ler Dome, Kutch Basin (India) allows one to interpret the incidence of different environmental parameters, especially the effect of sea-level changes in this group of microorganisms. The overall deposition of the Chari Formation took place in an open marine environment in the middle to outer shelf, having normal salinity and well-oxygenated bottom waters according to the lithofacies and the composition of the foraminiferal and macroinvertebrate assemblages. Changes in the diversity, abundance of foraminifera, and proportion of specialist forms were associated mainly with the availability of labile organic matter on the sea floor. The changes in trophic resources were associated with fluctuations in the type of sedimentation, which ranges from carbonates to siltstones and sandstones. During the regressive phase, a relatively high input of food resources, probably phytodetritus, was associated with siliciclastic sedimentation and commonly related with increased abundance and diversity of foraminifera, including specialist forms. During the transgressive phase, the influx of food resources from emerged areas and shallow environments decreased; sedimentation was more calcareous, with an accumulation of ammonoid shells that indicates hemipelagic conditions. The decrease in food resources for benthic foraminifera is reflected by a lesser diversity and abundance, and lower proportions of specialist foraminifera. |
| first_indexed | 2024-03-12T07:58:11Z |
| format | Article |
| id | doaj.art-c675f99fa75543c295c0e43f2aa34058 |
| institution | Directory Open Access Journal |
| issn | 0035-6883 2039-4942 |
| language | English |
| last_indexed | 2024-03-12T07:58:11Z |
| publishDate | 2020-04-01 |
| publisher | Milano University Press |
| record_format | Article |
| series | Rivista Italiana di Paleontologia e Stratigrafia |
| spelling | doaj.art-c675f99fa75543c295c0e43f2aa340582023-09-02T20:03:52ZengMilano University PressRivista Italiana di Paleontologia e Stratigrafia0035-68832039-49422020-04-01126210.13130/2039-4942/13276CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTIONSYED MD. WASIMMATIAS REOLIDABU TALIBSHABBER HABIB ALVIAnalysis of the foraminiferal assemblages of the Chari Formation (Middle-Upper Jurassic transition) exposed at Ler Dome, Kutch Basin (India) allows one to interpret the incidence of different environmental parameters, especially the effect of sea-level changes in this group of microorganisms. The overall deposition of the Chari Formation took place in an open marine environment in the middle to outer shelf, having normal salinity and well-oxygenated bottom waters according to the lithofacies and the composition of the foraminiferal and macroinvertebrate assemblages. Changes in the diversity, abundance of foraminifera, and proportion of specialist forms were associated mainly with the availability of labile organic matter on the sea floor. The changes in trophic resources were associated with fluctuations in the type of sedimentation, which ranges from carbonates to siltstones and sandstones. During the regressive phase, a relatively high input of food resources, probably phytodetritus, was associated with siliciclastic sedimentation and commonly related with increased abundance and diversity of foraminifera, including specialist forms. During the transgressive phase, the influx of food resources from emerged areas and shallow environments decreased; sedimentation was more calcareous, with an accumulation of ammonoid shells that indicates hemipelagic conditions. The decrease in food resources for benthic foraminifera is reflected by a lesser diversity and abundance, and lower proportions of specialist foraminifera.https://riviste.unimi.it/index.php/RIPS/article/view/13276Foraminifera; Systematics; Ecostratigraphy; Transgressive-regressive cycles; Kutch Basin. |
| spellingShingle | SYED MD. WASIM MATIAS REOLID ABU TALIB SHABBER HABIB ALVI CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION Rivista Italiana di Paleontologia e Stratigrafia Foraminifera; Systematics; Ecostratigraphy; Transgressive-regressive cycles; Kutch Basin. |
| title | CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION |
| title_full | CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION |
| title_fullStr | CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION |
| title_full_unstemmed | CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION |
| title_short | CALLOVIAN TO OXFORDIAN BENTHIC FORAMINIFERA FROM LER DOME, KUTCH BASIN (GUJARAT, INDIA): SYSTEMATIC, ECOSTRATIGRAPHY AND PALAEOENVIRONMENTAL RECONSTRUCTION |
| title_sort | callovian to oxfordian benthic foraminifera from ler dome kutch basin gujarat india systematic ecostratigraphy and palaeoenvironmental reconstruction |
| topic | Foraminifera; Systematics; Ecostratigraphy; Transgressive-regressive cycles; Kutch Basin. |
| url | https://riviste.unimi.it/index.php/RIPS/article/view/13276 |
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