Results 51 to 60 of about 1,867 (183)

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

open access: yesJournal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato   +2 more
wiley   +1 more source

Late Cretaceous marine biodiversity dynamics in the Eastern Caucasus, northern Neo-Tethys ocean: Regional imprints of global events [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2011
During the Late Cretaceous, marine organisms experienced significant changes in their biodiversity. These diversity changes were influenced, particularly, by the Oceanic Anoxic Event 2 near the Cenomanian/Turonian boundary (93.6 Ma).
Ruban Dmitry A.   +2 more
doaj   +1 more source

Diagenetic controls on porosity evolution and pore type organisation in microporous carbonate rocks: Evidence for mesogenetic porosity formation

open access: yesSedimentology, EarlyView.
ABSTRACT Microporous carbonate rocks typically record complex diagenetic histories driven by microbial activity and fluid interactions within multiple diagenetic environments. The relative roles of meteoric and burial diagenetic processes in pore evolution remain debated, particularly within Cretaceous carbonate systems of the Middle East, as does the ...
Hugues Bitault   +5 more
wiley   +1 more source

Bio- and isotope stratigraphy of the Cenomanian-Turonian transition and the variations related to OAE2 in the Holul section, west of Kermanshah [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2017
Micropalaeontological study based on planktonic foraminifera in the Cenomanian - Turonian succession of the Holul section, located in the Lurestan geological province (west of the Kermanshah City), resulted in distinction of Rotalipora cushmani ...
Mehdi Sarfi   +3 more
doaj   +1 more source

On the Origin of the Tingidae (Insecta, Heteroptera)

open access: yesZoologica Scripta, EarlyView.
ABSTRACT The hypothesis of a Gondwanian origin of the family Tingidae (Insecta, Heteroptera) has been promoted and seems to be generally accepted by specialists. However, the area of emergence and diversification of the clade, South American or Australian, is still debated and cannot be solved without integrating Vianaidinae, a subfamily considered as ...
Gilardet Rémy   +3 more
wiley   +1 more source

Late Cenomanian ostracode faunas from the area south of Ain Sukhna, western side of the Gulf of Suez, Egypt

open access: yesGeologia Croatica, 2011
Study of ostracode faunas from a Cenomanian exposure represented by the Galala Formation in the area south of the town Ain Sukhna on the western side of the Gulf of Suez has yielded 11 species belonging to 10 genera.
Mohamed Boukhary   +3 more
doaj   +1 more source

New information on the Cenomanian bothremydid turtle Algorachelus based on new, well-preserved material from Spain [PDF]

open access: yesFossil Record, 2018
Algorachelus peregrinus is the oldest representative of the crown group Pleurodira known in Laurasia. The type locality of this bothremydid is Algora, situated in central Spain, at levels deposited during the uppermost middle–lowermost upper ...
A. Pérez-García
doaj   +1 more source

Early Cretaceous (Neocomian-Cenomanian) Palynomorphs [PDF]

open access: yesJournal of Micropalaeontology, 1985
Abstract. INTRODUCTIONThis study is primarily concerned with the Neocomian to Aptian palynomorphs recorded in selected exploration wells (See Fig. 9). In order to document a complete Early Cretaceous microfloral succession in the studied wells, a reconnaissance of Aptian to Early Cenomanian palynomorphs was also undertaken.
Thusu, B., Van Der Eem, J. G. L. A.
openaire   +2 more sources

The Cenomanian-Turonian transition on the Peruvian margin

open access: yesCretaceous Research, 1993
Abstract In Peru, various deposittonal sequences can be recognized during the late middle Cenomanian to early Coniacian timespan, most of which seem to have an eustatic origin. For instance, the early late Cenomanian, late early Turonian and early Coniacian maximum floodings identified in Peru coincide with well-known global eustatic events.
/Jaillard, Etienne, Arnaud-Vanneau, A.
openaire   +2 more sources

A basal elasmosaurid plesiosaur from the upper Albian– lower Cenomanian? Cambridge Greensand

open access: yesActa Palaeontologica Polonica
An historical indeterminate elasmosaurid specimen CAMSM X50356 (CAMSM = Sedgwick Museum) collected during the 19th century is described. The specimen comes from the Cenomanian Cambridge Greensand although the possibility of an Albian–lower Cenomanian age
Jose P. O’Gorman, Roger B.J. Benson
doaj   +1 more source

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