TY  - JOUR
A1  - Caus, Esmeralda
A1  - Parente, Mariano
A1  - Vicedo, Vicent
A1  - Frijia, Gianluca
A1  - Martinez, Ricard
T1  - Broeckina gassoensis sp nov., a larger foraminiferal index fossil for the middle Coniacian shallow-water deposits of the Pyrenean Basin (NE Spain)
JF  - Cretaceous research
N2  - The Upper Cretaceous shallow-water carbonates of the Pyrenean Basin (NE Spain) host rich and diverse larger foraminiferal associations which witness the recovery of this group of protozoans after the dramatic extinction of the Cenomanian-Turonian boundary interval. In this paper a new, large discoidal porcelaneous foraminifer, Broeckina gassoensis sp. nov., is described from the middle Coniacian shallow-water deposits of the Collada Gasso Formation, in the Boixols Thrust Sheet. This is the first complex porcelaneous larger foraminifer of the Late Cretaceous global community maturation cycle recorded in the Pyrenean bioprovince. It differs from the late Santonian-early Campanian B. dufrenoyi for its smaller size in A and B generations and the less developed endoskeleton, which shows short septula. Broeckina gassoensis sp. nov. has been widely employed as a stratigraphic marker in the regional geological literature, under the name of "Broeckina", but its age was so far controversial. Its middle Coniacian age (lowermost part of the Peroniceras tridorsatum ammonite zone), established in this paper by strontium isotope stratigraphy, indicates that it took about 5 My after the Cenomanian-Turonian boundary crisis to re-evolve the complex test architecture of larger foraminifera, which is functional to their relation with photosymbiotic algae and K-strategy.
KW  - Larger Foraminifera
KW  - Biostratigraphy
KW  - Strontium isotope stratigraphy
KW  - Coniacian
KW  - Pyrenees
KW  - Spain
Y1  - 2013
U6  - https://doi.org/10.1016/j.cretres.2013.08.002
SN  - 0195-6671
SN  - 1095-998X
VL  - 45
SP  - 76
EP  - 90
PB  - Elsevier
CY  - London
ER  - 
TY  - JOUR
A1  - Boix, Carme
A1  - Frijia, Gianluca
A1  - Vicedo, Vicent
A1  - Bernaus, Josep M.
A1  - Di Lucia, Matteo
A1  - Parente, Mariano
A1  - Caus, Esmeralda
T1  - Larger foraminifera distribution and strontium isotope stratigraphy of the La Cova limestones (Coniacian-Santonian, "Serra del Montsec", Pyrenees, NE Spain)
JF  - Cretaceous research
N2  - The Upper Cretaceous La Cova limestones (southern Pyrenees, Spain) host a rich and diverse larger foraminiferal fauna, which represents the first diversification of K-strategists after the mass extinction at the Cenomanian-Turonian boundary.
 The stratigraphic distribution of the main taxa of larger foraminifera defines two assemblages. The first assemblage is characterised by the first appearance of lacazinids (Pseudolacazina loeblichi) and mean-dropsinids (Eofallotia simplex), by the large agglutinated Montsechiana montsechiensis, and by several species of complex rotalids (Rotorbinella campaniola, Iberorotalia reicheli, Orbitokhatina wondersmitti and Calcarinella schaubi). The second assemblage is defined by the appearance of Lacazina pyrenaica, Palandrosina taxyae and Martiguesia cyclamminiformis.
 A late Coniacian-early Santonian age was so far accepted for the La Cova limestones, based on indirect correlation with deep-water fades bearing planktic foraminifers of the Dicarinella concavata zone. Strontium isotope stratigraphy, based on many samples of pristine biotic calcite of rudists and ostreids, indicates that the La Cova limestones span from the early Coniacian to the early-middle Santonian boundary. The first assemblage of larger foraminifera appears very close to the early-middle Coniacian boundary and reaches its full diversity by the middle Coniacian. The originations defining the second assemblage are dated as earliest Santonian: they represent important bioevents to define the Coniacian-Santonian boundary in the shallow-water facies of the South Pyrenean province.
 By means of the calibration of strontium isotope stratigraphy to the Geological Time Scale, the larger foraminiferal assemblages of the La Cova limestones can be correlated to the standard biozonal scheme of ammonites, planktonic foraminifers and calcareous nannoplankton. This correlation is a first step toward a larger foraminifera standard biozonation for Upper Cretaceous carbonate platform facies.
KW  - Larger Foraminifera
KW  - Biostratigraphy
KW  - Strontium isotope stratigraphy
KW  - Coniacian-Santonian boundary
KW  - Shallow-water carbonates
KW  - Pyrenees
KW  - Spain
Y1  - 2011
U6  - https://doi.org/10.1016/j.cretres.2011.05.009
SN  - 0195-6671
VL  - 32
IS  - 6
SP  - 806
EP  - 822
PB  - Elsevier
CY  - London
ER  -