Results 51 to 60 of about 14,570 (219)

Are spherulitic lacustrine carbonates an expression of large-scale mineral carbonation? : A case study from the East Kirkton Limestone, Scotland [PDF]

, 2018
BP Exploration Co. is thanked for funding, and particularly the Carbonate Team for supporting this research and for fruitful discussions. West Lothian Council and Scottish Natural Heritage are thanked for allowing access and permission for sampling the ...
Billing, Ian, Brasier, Alexander T, Fellows, Simon M., Matthews, Anna, McClymont, Erin L., McGill, Rona A.R., Mercedes-Martín, Ramon, Pedley, Martyn, Prior, Tim J., Reijmer, John J. G., Rogerson, Mike, Vonhof, Hubert   +11 more
core   +1 more source

Barremian-early Aptian charophyte biostratigraphy

, 2021
New Barremian-early Aptian charophyte biozonations are proposed here based on the charophyte succession in the Maestrat Basin (Iberian Chain, Spain). Biostratigraphic analysis distinguished two biozonations, European and Eurasian, which were compared to establish correlations.
Pérez Cano, Jordi, Bover-Arnal, Telm, Martín-Closas, Carles   +2 more
openaire   +1 more source

Seismic Sequence Stratigraphy Applied to Reservoir Recognition and Evolution on Marine Carbonatic Ramp—Macaé Group (Albian to Cenomanian) of Campos Basin

Geological Journal, EarlyView.
A classic oil producing interval of the Campos Basin—Macaé Group is revisited through seismic stratigraphic analysis, providing a stratigraphic framework, characteristic depositional and relative time positioning for several complex structural settings.
Renata Alvarenga, Juliano Kuchle, Francyne Amarante, Garibaldi Armelenti, Claiton Marlon dos Santos Scherer, Luiz Fernando De Ros, Bruno de Souza Silva, Igor Marzano, Márcia Karam, Candy Shirley Rosa Contreras, João Claudio Conceição, José Luis Drummond Alves, Luiz Landau   +12 more
wiley   +1 more source

Umbria-Marche Basin, Central Italy: A Reference Section for the Aptian-Albian Interval at Low Latitudes

Scientific Drilling, 2012
Within the Cretaceous Period, the Aptian-Albian interval (125–99.6 Ma, Ogg et al., 2008) was a critical time on a global scale. This is evident from 1) changes in the nature of the ocean-climate system brought about by increased ocean crust production ...
Renato Paes de Almeida, Grasiane Luz Mathias, Jairo Savian, Liliane Janikian, Fabrizio Frontalini, Gerson Fauth, Carla Bucci, Giuseppe Bancalà, Luigi Jovane, Rodolfo Coccioni, Ricardo Ivan Ferreira da Trindade   +10 more
doaj   +1 more source

Atmospheric pCO₂ Reconstruction of Early Cretaceous Terrestrial Deposits in Texas and Oklahoma Using Pedogenic Carbonate and Occluded Organic Matter

Geosciences, 2022
Pedogenic carbonate samples collected from three Lower Cretaceous (Aptian–Albian) fossil localities in Texas and Oklahoma were analyzed to develop paleoatmospheric pCO2 estimates by measuring the stable carbon isotopes of pedogenic calcite and their co ...
Kate Andrzejewski, Neil Tabor, Dale Winkler, Timothy Myers   +3 more
doaj   +1 more source

Timing of diagenesis and very low-grade metamorphism in the eastern sector of the Sierra de Cameros (Iberian Range, Spain): a U–Pb SHRIMP study on monazite [PDF]

, 2009
The Sierra de Cameros is an intracontinental orogen and represents the north-western part of the Iberian Range in Northern Spain. It comprises a thick sequence of syn-rift continental sediments (mainly sandstones and carbonates) deposited during ...
Aleinikoff, Bollinger, Cabella, Casas-Sainz, Casquet, Cherniak, Del Río, Evans, Evans, Frantz, Förster, Gabudianu Radulescu, Gil-Imaz, Goldberg, Janots, Janots, Kempe, Krenn, Lanzirotti, Lev, Mantilla-Figueroa, Mas, Masuda, Mata, Mata, Mata, Milodowski, Montel, Pan, Pan, Parrish, Rasmussen, Rasmussen, Rasmussen, Rubatto, Sawka, Smith, Spear, Tera, Tischer, Wilby, Williams, Wing   +42 more
core   +2 more sources

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

Integrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu, Qian‐Nan Zhang, Dang‐Peng Xi   +2 more
wiley   +1 more source

Early Cretaceous biogeographic and oceanographic synthesis of Leg 123 (off Northwestern Australia) [PDF]

, 1992
Biogeographic observations made by Leg 123 shipboard paleontologists for Lower Cretaceous nannofossils, foraminifers, radiolarians, belemnites, and inoceramids are combined in this chapter to evaluate the paleoceanographic history of the northwestern ...
Baumgartner, P.O., Bown, P., Marcoux, J., Mutterlose, J., Kaminski, M.A., Haig, D., McMinn, A.   +6 more
core   +5 more sources

The systematic affinities between the Lower Cretaceous Ammonoidea Protacanthoplites abichi (Anthula, 1900) and Acanthohoplites aschiltaensis (Anthula, 1900)

European Journal of Taxonomy, 2023
This work provides the first revision and illustration of the type material of the ammonite species Parahoplites abichi Anthula [Type species of Protacanthoplites Tovbina] and Parahoplites aschiltaensis Anthula [Type species of Acanthohoplites Sinzow ...
Camille Frau
doaj   +1 more source

The lower Aptian ammonites of the Les Ferres Aptian Basin (Lower Cretaceous, Southeast of France) Part I: Introduction and biostratigraphy [PDF]

Carnets de géologie (Notebooks on geology), 2019
On the southern margin of the Vocontian Basin (SE France), for taphonomic reasons (fragmentation, reworking, pyritization), lower Aptian (Lower Cretaceous) deposits of the interval between the Deshayesites deshayesi and Dufrenoyia furcata zones are usually not suitable for studying the late ontogenetic developments of ammonites (fossil cephalopods). In
Bersac, Stéphane, Bert, Didier
openaire   +2 more sources