Results 71 to 80 of about 3,337 (175)

Revisión de algunos ammonites aptienses colectados por Gaston Astre en la Provincia de Lérida, Cataluña, España [PDF]

open access: yes, 2015
We study the three best preserved ammonites collected by Astre in 1924-1925 in Lleida Province, Catalonia, Spain, in order to assess their taxonomic assignment. We also include images of these ammonoids since they were not illustrated in Astre's original
Moreno-Bedmar, Josep A., Minor, Keith P.
core   +1 more source

Holostratigraphy of the Kahmah regional Series in Oman, Qatar, and the United Arab Emirates

open access: yesCarnets de Géologie, 2008
The stratigraphic framework of the uppermost Jurassic - Lower Cretaceous interval of the Gulf area is revised using both historical and recently acquired paleontological (ammonites, calpionellids, foraminifers, 'calcareous' algae), sedimentological and ...
Granier Bruno
doaj  

Zones d'ammonites et de foraminifères du Vraconnien au Turonien : Une comparasion entre les domaines boréal et téthysien (NW Europe / Tunisie centrale)

open access: yesCarnets de Géologie, 2008
Depuis la fin du 19ème siècle, l'intervalle comprenant l'Albien supérieur élevé, le Cénomanien, le Turonien et le Coniacien basal a été subdivisé d'abord en zones d'ammonites puis, à partir du milieu du 20ème siècle, en zones de foraminifères ...
Amédro Francis, Robaszynski Francis
doaj  

Ammonites of New Jersey

open access: yes, 2000
30 p. : ill., map ; 26 cm.Includes bibliographical references (p. 27-30).New fossil collections provide additional information about the late Campanian and Maastrichtian ammonites from the Navesink Formation of New Jersey.
Cobban, William A., 1916-2015.   +3 more
core  

Échanges et colonisations fauniques (Ammonitina) entre Téthys et Atlantique sud au Crétacé supérieur : voies atlantiques ou sahariennes ?

open access: yesCarnets de Géologie, 2007
Généralement considéré comme une période chaude, le Crétacé supérieur témoigne d'une extension maximale des domaines marins. Les optima transgressifs du Cénomanien et du Turonien inférieur induisent la création de nouveaux domaines de mer épicontinentale
Courville Philippe
doaj  

About the stratigraphic position of the Lower Aptian Roloboceras hambrovi (Ammonoidea) level

open access: yesCarnets de Géologie, 2008
In the stratotype of the Lower Aptian substage the position of the assemblage that includes Roloboceras spp. and Megatyloceras spp. has been clearly established as being in the middle part of the upper Bedoulian. Some authors have erected this horizon as
Conte Gabriel   +3 more
doaj  

Rare Middle Jurassic ammonites of the families Erycitidae, Otoitidae and Stephanoceratidae from southern Germany [PDF]

open access: yes, 2010
Dietze, Volker   +10 more
core   +1 more source

Valanginian ammonites in East Greenland

open access: yes, 2001
ammonites, Boreal, Tethys, bed-by-bed collection, Valanginian, Wollaston Forland, East ...
Alsen, Peter
core  

L'évolution des peuplements d'ammonites au cours de l'Oxfordien inférieur (Zone à Mariae et Zone à Cordatum) du Jura (Est de la France) [The evolution of ammonite associations during the Early Oxfordian (Mariae and Cordatum zones) in the Jura area (eastern France)]

open access: yesCarnets de Géologie, 2010
The study of more than 40 sections in the "Creniceras renggeri marls" of the French Jura Range (Lower Oxfordian) has found: * a precise biochronostratigraphic subdivison of 16 successive populations or associations which appears to be stable over the ...
Jardat Rémi
doaj  

OCCURRENCE OF LIASSIC FAUNAS AT WAANEY (UANEI) PROVINCE OF BAY, SOUTH—WESTERN SOMALIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
The sequence exposed at Waaney (South—western Somalia) consists, from bottom to top, of the following horizons: A) Blackish marly limestones, thickness 20 m; B) Grey and greenish marls and shales, thickness 10 m; C) Vacuolar yellowish—grey limestone ...
PAOLO CANUTI   +3 more
doaj  

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