Results 241 to 250 of about 949,321 (287)

Factors Controlling Exceptional Preservation in Concretions

Palaios, 2015
Abstract Concretions are an important source of soft-bodied fossils. In order to determine the controls on exceptional fossilization within concretions, we scored 88 concretion-bearing sites for 11 environmental and compositional variables together with presence/absence of soft-tissue preservation and analyzed their relationships ...
Victoria E McCoy, Derek Briggs
exaly   +2 more sources

Fossil Fish Stomachs: A Microenvironment for Exceptional Preservation

Historical Biology, 1992
Exceptionally preserved fossil fish from the Cretaceous of north east Brazil contain well preserved arthropods and small fish in the alimentary tract. The fish are preserved in early diagenetic concretions and often retain their original three dimensional morphology.
David Martill, Philip R. Wilby
exaly   +2 more sources

Exceptional Preservation of Fossils in an Upper Proterozoic Shale

Nature, 1988
Late Proterozoic organisms must have been diverse and widely distributed, but in general their fossil record is both taxonomically and environmentally limited. Exceptional preservation of Proterozoic fossils is not unknown, but it is usually associated with silicified carbonates from restricted peritidal or playa lake environments.
Nicholas J. Butterfield, Andrew H. Knoll, K Swett   +2 more
exaly   +3 more sources

Exceptional Preservation in the Jurassic of Osteno

Philosophical Transactions of the Royal Society of London Series B, Biological Sciences, 1985
Abstract The Sinemurian deposit of Osteno, discovered in 1964, is remarkable for the exceptional preservation of its fossils. They are almost exclusively non-calcareous organisms such as fishes, crustaceans, polychaetes and nematodes.
exaly   +2 more sources

Exceptional Fossil Preservation During CO2 Greenhouse Crises?

Palaeogeography, Palaeoclimatology, Palaeoecology, 2011
Abstract Exceptional fossil preservation may require not only exceptional places, but exceptional times, as demonstrated here by two distinct types of analysis. First, irregular stratigraphic spacing of horizons yielding articulated Triassic fishes and Cambrian trilobites is highly correlated in sequences in different parts of the world, as if there ...
Gregory Retallack
exaly   +2 more sources

A Multicellular Alga With Exceptional Preservation From the Ediacaran of Nevada

Journal of Paleontology, 2014
Elainabella deepspringensisnew genus new species is a one-mm-wide, non-biomineralized, three-dimensionally preserved fossil with segmented branches and apparent cellular structure. A single specimen was recovered from an interval of black shale within the Ediacaran portion of the Esmeralda Member of the Deep Spring Formation at Mt.
Stephen M. Rowland, Margarita G. Rodriguez   +1 more
exaly   +2 more sources

Exceptional preservation of organs in Devonian placoderms from the Gogo lagerstätte

Science, 2022
The origin and early diversification of jawed vertebrates involved major changes to skeletal and soft anatomy. Skeletal transformations can be examined directly by studying fossil stem gnathostomes; however, preservation of soft anatomy is rare. We describe the only known example of a three-dimensionally mineralized heart, thick-walled stomach, and ...
Kate Trinajstic, John A. Long, Sophie Sanchez, Catherine A. Boisvert, Daniel Snitting, Paul Tafforeau, Vincent Dupret, Alice M. Clement, Peter D. Currie, Brett Roelofs, Joseph J. Bevitt, Michael S. Y. Lee, Per E. Ahlberg   +12 more
openaire   +2 more sources