New Early to Middle Triassic U–Pb ages from South China: Calibration with ammonoid biochronozones and implications for the timing of the Triassic biotic recovery
Timing of the Early Triassic carbon cycle perturbations inferred from new U–Pb ages and ammonoid biochronozones.
Mode and Rate of Growth in Ammonoids
This chapter first discusses the general mode of growth and then describes the ontogenetic sequence of growth stages in ammonoids, focusing primarily on postembryonic growth.
Good Genes and Good Luck: Ammonoid Diversity and the End-Permian Mass Extinction
Analysis of a global diversity data set of ammonoid genera covering about 106 million years centered on the Permian-Triassic boundary shows that Triassic ammonoids actually reached levels of diversity higher than in the PerMian less than 2 million years after the PTB.
The Early Triassic ammonoid recovery: Paleoclimatic significance of diversity gradients
Mature Modifications and Dimorphism in Ammonoid Cephalopods
The shell of an ammonoid is a kind of autobiography of the animal that once occupied it, where the growth lines and the tiny intervals in between record what was happening at the anterior end of the body.
Hettangian and Sinemurian magnetostratigraphy from Paris Basin
A long core (1110 m) drilled at Montcornet (northeastern Paris Basin) provides early Jurassic magnetostratigraphic data coupled with biochronological control. About 600 paleomagnetic samples were…
Climatic and biotic upheavals following the end-Permian mass extinction
The recovery from the end-Permian mass extinction was slow and prolonged. A temperature reconstruction shows that further biotic crises during the recovery were associated with extreme warmth.…
Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis
- T. Galfetti, P. Hochuli, A. Brayard, H. Bucher, H. Weissert, J. Vigran
- Environmental Science, Geography
- 1 April 2007
One of the most important carbon cycle perturbations following the end-Permian mass extinction event straddles the Smithian-Spathian boundary (SSB) (Olenekian, Early Triassic). This anomaly is…