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Showing results for tags 'middle cretaceous'.
From the album: MY FOSSIL Collection - Dpaul7Silver Iridescent Ammonite Fossils Mahajanga Province, Madagascar TIME PERIOD: Middle Cretaceous (110 million years ago) Data: Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Ammonites are excellent index fossils, and
You should read these papers. They are very interesting: Carvalho, I.; Novas, F.E.; Agnolín, F.L.; Isasi, M.P.; Freitas, F.I.; Andrade, J.A.. (2015). "A new genus and species of enantiornithine bird from the Early Cretaceous of Brazil". Brazilian Journal of Geology 45 (2): 161–171. DOI:10.1590/23174889201500020001. Carvalho, I.; Novas, F.E.; Agnolín, F.L.; Isasi, M.P.; Freitas, F.I.; Andrade, J.A.. (2015). "A Mesozoic bird from Gondwana preserving feathers". Nature Communications 6. DOI:10.1038/ncomms8141. The discovery of Cratoavis in Brazil is remarkable because nearly all Early to Middle
An interesting article about a new sauropod from Tanzania: http://phys.org/news/2014-09-species-titanosaurian-dinosaur-tanzania.html The discovery of a titanosaur from the Middle Cretaceous deposits in Tanzania is significant in many respects. First, it represents the third diagnostic titanosaur from Cretaceous sediments in sub-Saharan Africa. Second, it bolsters the hypothesis by Paul Sereno and colleagues that the breakup of Gondwana was a rather gradual one, so a number of titanosaurs known from South America may also have inhabited sub-Saharan Africa at a time when South America was sl
DD1991 posted a topic in EuropeA forthcoming paper on the largest specimen of Dakosaurus from the UK (Young et al. in press) mentions a number of Dakosaurus specimens found in the Woburn Sands Formation, which leads me to suspect that a number of loose Lower Greensand sediments in SE england may have specimens reworked from Late Jurassic sediments. Are there any other Cretaceous sediments in England that have yielded fossils reworked from Jurassic sediments? Young MT, Steel L, Rigby MP, Howlett EA, Humphrey S. (In press). Largest known specimen of the genus Dakosaurus (Metriorhynchidae: Geosaurini) from the Kimmeridge Clay