Following the unanimous approval of the Executive Committee on the International Union of Geological Sciences as notified on April 8,2016,the Global boundary Stratotype Section and Point for the base of the Albian Sta...Following the unanimous approval of the Executive Committee on the International Union of Geological Sciences as notified on April 8,2016,the Global boundary Stratotype Section and Point for the base of the Albian Stage of the Cretaceous is defined at the first occurrence datum of the planktonic foraminiferan Microhedbergella renilaevis Huber and Leckie,2011 at a level 37.4 meters above the base of the Marnes Bleues Formation and 40 cm above the base of the Niveau Kilian marker bed in the section SSE of the Col de Pré-Guittard,Arnayon,Drôme,France.The first occurrence of Microhedbergella renilaevis is placed within a 100-m section of argillaceous sediments with 28 secondary markers including calcareous nannofossils,planktonic foraminifera,an inoceramid bivalve,ammonites,stable carbon isotopes,and local marker beds.展开更多
Planktonic microfossils have played an enormously important role in modem earth science,notably including industrial hydrocarbon exploration and academic Deep Sea Drilling,providing essential data for age models and r...Planktonic microfossils have played an enormously important role in modem earth science,notably including industrial hydrocarbon exploration and academic Deep Sea Drilling,providing essential data for age models and rich suites of palaeoceanographic data.Conversely this broad application has resulted in the development of detailed knowledge of planktonic microfossils and in stimulating study of them.展开更多
文摘Following the unanimous approval of the Executive Committee on the International Union of Geological Sciences as notified on April 8,2016,the Global boundary Stratotype Section and Point for the base of the Albian Stage of the Cretaceous is defined at the first occurrence datum of the planktonic foraminiferan Microhedbergella renilaevis Huber and Leckie,2011 at a level 37.4 meters above the base of the Marnes Bleues Formation and 40 cm above the base of the Niveau Kilian marker bed in the section SSE of the Col de Pré-Guittard,Arnayon,Drôme,France.The first occurrence of Microhedbergella renilaevis is placed within a 100-m section of argillaceous sediments with 28 secondary markers including calcareous nannofossils,planktonic foraminifera,an inoceramid bivalve,ammonites,stable carbon isotopes,and local marker beds.
基金supported grants from the UK Natural Environment Research Council(Grant Nos.NE/N017900/1&NE/J006416/l)the State Key Laboratory of Paleobiology and Stratigraphy(Nanjing).
文摘Planktonic microfossils have played an enormously important role in modem earth science,notably including industrial hydrocarbon exploration and academic Deep Sea Drilling,providing essential data for age models and rich suites of palaeoceanographic data.Conversely this broad application has resulted in the development of detailed knowledge of planktonic microfossils and in stimulating study of them.
