Sr-ages and grade-datings in the area of the Lower Miocene near Bordeaux (Aquitaine Basin, France)

Gourinard, Y.; Magné, Jean; Ringeade, M.; Fondecave-Wallez, Marie-José

doi:10.1016/s1251-8050(99)80228-6

Cited by 3 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sediments assigned to the lowermost Burdigalian (ca. 20 Ma) are indeed exposed at Le Péloua (Cahuzac et al 1996;Gourinard et al 1999;Cahuzac and Poignant 2005). The Austrian specimen, however, are older than assumed by Withers (1929) and derive from middle Badenian deposits, which are correlated with the middle Miocene Langhian stage (Harzhauser et al 2020).…”

Section: Some Overlooked Protochelonibiine Records From the Oligo-mio...mentioning

confidence: 90%

New and overlooked occurrences of the rarely reported protochelonibiine “turtle” barnacles from the Oligocene and Miocene of Europe

Collareta

Harzhauser

Rasser

2021

PalZ

View full text Add to dashboard Cite

We report on two clustering chelonibiid shells from Rupelian deposits of southwestern Germany. One of these specimens displays a tripartite rostral complex and disparietal radii that indicate the Oligocene species Protochelonibia melleni, which was known so far from isolated compartments only. A literature review reveals two additional, overlooked records of the rarely reported genus Protochelonibia, coming respectively from the Burdigalian of France and the Langhian of Austria. Both these historical finds likely represent the Miocene species Protochelonibia submersa. All together, these occurrences support the notion that the protochelonibiines had acquired a broad distribution as early as in Rupelian times, when P. melleni occurred along the proto-Gulf of Mexico and in the Western Paratethys. Both P. melleni and P. submersa grew in form of peltate shells that evoke a superficial adhesion to 1 some kind of quickly moving hosts. The outer wall of the abraded German colony of P. melleni is comprised of pillar-like blocks of shelly material. In other coronuloids, similar yet more prominent septa abut outward to form T-shaped flanges and intervening longitudinal canals that facilitate the grasping of various kinds of penetrable substrates. Whether the diminutive external longitudinal parietal septa of P. melleni represent an early stage in the evolution of the coronuloid shell architecture or vestigial structures cannot be ascertained, but the former hypothesis seems to be more likely. New additions to the pre-Pliocene fossil record of Coronuloidea will hopefully clarify this and other crucial aspects of the origin and early evolution of the turtle and whale barnacles.

show abstract

Section: Some Overlooked Protochelonibiine Records From the Oligo-mio...mentioning

confidence: 90%

New and overlooked occurrences of the rarely reported protochelonibiine “turtle” barnacles from the Oligocene and Miocene of Europe

Collareta

Harzhauser

Rasser

2021

PalZ

View full text Add to dashboard Cite

show abstract

“…Along the Saucats stream, the observed sequences can be related to third-order cycles sensu [21,22] within the large transgression-regression cycle of the Neogene [3]. This new proposition based on facies and ecological analysis differs from a previous tentative correlation based on grade-datings on this same stratotype section [19,20].…”

Section: Stratigraphic Implicationsmentioning

confidence: 70%

“…It was recently strengthened by measurement of 87 Sr/ 86 Sr ratios on bivalves [6,8]. Some grade-dating measurements on miogypsinids and globigerinids [19,20] are also documented.…”

Section: The Historical Stratotypes Of Aquitanian and Burdigalian In ...mentioning

confidence: 99%

Sedimentology and sequence stratigraphy of Aquitanian and Burdigalian stratotypes in the Bordeaux area (southwestern France)

Parize¹,

Mulder²,

Cahuzac³

et al. 2008

Comptes Rendus. Géoscience

View full text Add to dashboard Cite

The historical stratotypes of the Aquitanian and Burdigalian in the Aquitaine Basin are studied here by using the tools of facies sedimentology and the concept of sequence stratigraphy. This analytical method combines recognition and sequential organization of facies, and several types of stratigraphic markers. This method allows identification of at least six depositional sequences within the Miocene of the Saucats area: the four lower ones belong to the Aquitanian, the fifth one to the whole Burdigalian, while the sixth sequence corresponds to the Serravallian. In addition, this method provides evidence of a period of emersion before each transgression, suggesting potential fluvial erosion. Nevertheless, these phases are of lower amplitude than those observed in the Rhodano-Provençal Basin. To cite this article: O.

show abstract

“…trilobus, du Burdigalien (N6, base de N7 de Blow). Un gradedating [20] sur des exemplaires de cette dernière espèce a donné un âge de 18,7 ±0,3 Ma. Le nannoplancton associé, assez abondant (Helicosphaera kamptneri, H. ampliaperta, quelques Cyclicargolithus abisectus et floridanus), peut être attribué à la nannozone NN2 de Martini [29].…”

Section: La Formation De Saint-antoineunclassified

“…Cette méthode utilise le degré d'évolution graduelle d'un caractère mesurable chez les populations de certaines lignées : par exemple celle qui comporte dans sa succession l'espèce Globigerinoides trilobus. Ce degré d'évolution permet d'interpoler des âges numériques, obtenus par des datations radiométriques [20,22]. Les grade-datings des échantillons d'Alzelle, faites sur des populations d'au moins 32 individus, sont les suivantes, de bas en haut (Fig.…”

Section: Grade-datingsunclassified

Les formations burdigaliennes de Corse orientale dans leur cadre géodynamique

Loÿe-Pilot

Durand-Delga²,

Feinberg

et al. 2004

Comptes Rendus. Géoscience

View full text Add to dashboard Cite

Liés à la naissance du canal de Corse, les premiers sédiments marins transgressifs sur le bâti de Corse orientale sont datés du milieu du Burdigalien par le nannoplancton et les Foraminifères planctoniques (âge relatif et grade-datings entre 18,7 et 18,3 Ma) dans les brèches granitiques de la formation de Saint-Antoine et les marnes pélagiques de celle d'Alzelle. La formation d'Aghione (Burdigalien terminal-Langhien) est localement discordante. Élément d'un grand accident est-corse, la faille de Saint-Antoine a eu, au Burdigalien, un jeu distensif qui s'est poursuivi jusqu'au Miocène supérieur, à la fin duquel a eu lieu la surrection de la Castagniccia.

show abstract

Sr-ages and grade-datings in the area of the Lower Miocene near Bordeaux (Aquitaine Basin, France)

Cited by 3 publications

References 1 publication

New and overlooked occurrences of the rarely reported protochelonibiine “turtle” barnacles from the Oligocene and Miocene of Europe

New and overlooked occurrences of the rarely reported protochelonibiine “turtle” barnacles from the Oligocene and Miocene of Europe

Sedimentology and sequence stratigraphy of Aquitanian and Burdigalian stratotypes in the Bordeaux area (southwestern France)

Les formations burdigaliennes de Corse orientale dans leur cadre géodynamique

Contact Info

Product

Resources

About