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| Hauterivian | |
|---|---|
| Name | Hauterivian |
| Color | #FFD700 |
| Time start | 130.0 |
| Time end | 129.4 |
| Unit | Stage |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Named for | Hauterive |
| Named by | Henri Coquand |
| Region | Europe |
Hauterivian The Hauterivian is a stage of the Early Cretaceous epoch defined by stratigraphic, paleontological, and geochronological criteria. It was named by Henri Coquand for strata near Hauterive and formalized through work by commissions such as the International Commission on Stratigraphy and researchers affiliated with institutions like the British Geological Survey and the Geological Survey of Canada. The stage has been integrated into global time scales alongside units such as the Valanginian and Barremian.
The name derives from the type locality near Hauterive in France, described by Henri Coquand in the 19th century and later redescribed by regional geologists from the University of Lyon and the Muséum national d'Histoire naturelle. Formal definition and boundaries were ratified through proposals presented to the International Union of Geological Sciences and the International Commission on Stratigraphy, with correlations promoted by workers at the British Geological Survey, the Institut de Physique du Globe de Paris, and the Geological Society of America.
The Hauterivian overlies the Valanginian and underlies the Barremian and has been dated using radiometric methods developed at facilities such as the US Geological Survey and the ETH Zurich. High-precision ages have been produced by teams at the Geological Survey of Canada and laboratories using U–Pb dating on zircon from ash beds correlated to the stage, with integration of data from publications in journals like Geology and Journal of the Geological Society. The stage appears in regional chronostratigraphic charts maintained by the International Commission on Stratigraphy and mapped by national surveys including the Bureau of Economic Geology.
During the Hauterivian, paleogeographic reconstructions produced by groups at the Paleontological Research Institution and the Smithsonian Institution show continental configurations influenced by the breakup of Pangaea and seafloor spreading at rifted margins documented by researchers at the Scripps Institution of Oceanography and the Woods Hole Oceanographic Institution. Depositional environments range from shallow carbonate platforms studied in the Alps and by the Swiss Geological Survey to siliciclastic basins investigated in the North Sea and the Paris Basin by the British Geological Survey and the French Geological Survey (BRGM). Evaporite and reefal facies have been described by teams associated with the University of Barcelona and the University of Vienna.
The Hauterivian contains a diverse fossil record used for biostratigraphic zonation by specialists from the Natural History Museum, London and the Muséum national d'Histoire naturelle. Ammonite faunas serve as primary index fossils following schemes advanced by paleontologists at the University of Cambridge and the University of Montpellier, while planktonic foraminifera and calcareous nannofossils have been applied by researchers at the National Oceanography Centre and the Max Planck Institute for Evolutionary Anthropology. Marine reptiles reported from Hauterivian strata include specimens described by teams at the Natural History Museum, Berlin and the Royal Belgian Institute of Natural Sciences, and ichthyofauna and bivalve assemblages have been catalogued by the Smithsonian Institution and the American Museum of Natural History.
Radiometric calibration using U–Pb dating and argon–argon methods developed at the University of California, Berkeley and the Geological Survey of Canada have refined Hauterivian absolute ages. Chemostratigraphic correlations employing stable isotope work conducted at the Max Planck Institute for Chemistry and sequence stratigraphic frameworks articulated by researchers at the Norwegian Geological Survey link Hauterivian sections across Europe, North Africa, and the Americas. Correlative work uses marker horizons tied to data published in journals such as Palaeogeography, Palaeoclimatology, Palaeoecology and Earth and Planetary Science Letters.
Significant Hauterivian sequences occur in the Paris Basin, the Valais region of the Swiss Alps, the Carpathians, the Cretaceous basins of Spain, and the Apennines where lithostratigraphy has been detailed by regional surveys like the BRGM and the Servizio Geologico d'Italia. Offshore occurrences in the North Sea and the Gulf of Mexico have been documented by industry geoscientists at companies such as BP and ExxonMobil and by consortia linked to the Bureau of Ocean Energy Management. North African exposures studied by teams from the University of Algiers and the Royal Botanic Gardens, Kew provide additional reference sections.
Hauterivian strata host hydrocarbon reservoirs exploited in regions explored by firms including TotalEnergies, Shell, and Chevron, with reservoir characterization advanced by research at the Bureau of Economic Geology and the Norwegian Petroleum Directorate. Carbonate and siliciclastic units have been mined for building stone in the Ligurian Alps and for aggregate in basins mapped by the British Geological Survey. Phosphorite and associated mineral occurrences described in reports from the United States Geological Survey and the Geological Survey of India have led to localized extraction and economic assessment by national ministries such as the Ministry of Mines (India).
Category:Stages of the Cretaceous