Danièle Gaspard
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View article: Shell asymmetry in Cretaceous Cyclothyrididae (Brachiopoda): variability, ontogeny and terminology
Shell asymmetry in Cretaceous Cyclothyrididae (Brachiopoda): variability, ontogeny and terminology Open
The asymmetry observed in rhynchonellid brachiopod shells has been discussed for decades and continues to attract attention. This noteworthy modification of the anterior margin morphology during the ontogeny has evolved several times in rh…
View article: Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition
Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition Open
Most of our knowledge of past seawater temperature history is based on δ18O values of calcium carbonate fossil shells. However, the determination of past temperatures using this proxy requires the knowledge of past seawater δ18O values, wh…
View article: Comment on egusphere-2022-1144
Comment on egusphere-2022-1144 Open
Abstract. Most of our knowledge of past ocean temperature history is based on the δ18O measurements of calcium carbonate fossil shells. However, the determination of past temperature using this proxy requires the knowledge of past ocean δ1…
View article: Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition
Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition Open
Most of our knowledge of past ocean temperature history is based on the δ18O measurements of calcium carbonate fossil shells. However, the determination of past temperature using this proxy requires the knowledge of past ocean δ18O, which …
View article: Up in the air: drone images reveal underestimation of entanglement rates in large rorqual whales
Up in the air: drone images reveal underestimation of entanglement rates in large rorqual whales Open
Entanglement in fishing gear is a significant threat to many cetaceans. For the 2 largest species, the blue whale Balaenoptera musculus and the fin whale B. physalus , reports of entangled individuals are rare, leading to the assumption th…
View article: The debated question of asymmetrical rhynchonellids (Brachiopoda, Rhynchonellida): examples from the Late Cretaceous of Western Europe
The debated question of asymmetrical rhynchonellids (Brachiopoda, Rhynchonellida): examples from the Late Cretaceous of Western Europe Open
Many Cretaceous asymmetrical rhynchonellid brachiopods (Brachiopoda, Rhynchonellida) have long been considered as Rhynchonella difformis (Valenciennes in Lamarck, 1819). After a revision, Owen (1962) included the Cenomanian specimens from …
View article: Strontium isotope geochemistry of modern and ancient archives: tracer of secular change in ocean chemistry
Strontium isotope geochemistry of modern and ancient archives: tracer of secular change in ocean chemistry Open
Strontium isotopes of marine archives provide a significant means for tracing physical and chemical processes operating over geologic time. Modern articulated brachiopods and halite samples were collected from all depths of the world’s mai…
View article: A SAMPLING STRATEGY FOR RECENT AND FOSSIL BRACHIOPODS: SELECTING THE OPTIMAL SHELL SEGMENT FOR GEOCHEMICAL ANALYSES
A SAMPLING STRATEGY FOR RECENT AND FOSSIL BRACHIOPODS: SELECTING THE OPTIMAL SHELL SEGMENT FOR GEOCHEMICAL ANALYSES Open
Recent and fossil brachiopod shells have a long record as biomineral archives for (palaeo)climatic and (palaeo)environmental reconstructions, as they lack or exhibit limited vital effects in their calcite shell and generally are quite resi…