Articles tagged with Index Fossils
A new study using hyoid bone analysis has confirmed that Nanotyrannus was a distinct species from T. rex, with the fossil standing at 18 feet tall compared to the massive 40-foot long T. rex. The findings provide conclusive evidence for the existence of Nanotyrannus and shed light on its growth patterns and ecosystem dynamics.
Salterella, a tiny Cambrian creature, has been reclassified with cnidarians due to its unique shell structure and mineral composition. The research team suggests that Salterella's shell served a distinct purpose, possibly related to feeding or stability.
A new study explores why certain parts of reptiles, such as lizard jaws and snake vertebrae, are more likely to be preserved as fossils. The research reveals that physical characteristics like bone density and body size, as well as the environment in which the animals lived and died, are major predictors of fossil completeness.
A new study using museum collections reveals that ammonites were diverse and thriving across the globe just before their extinction in the Late Cretaceous. The research found that the balance of speciation and extinction rates varied by region, contradicting previous theories.
A new study published in Trends in Ecology & Evolution suggests that animals first evolved around 574 million years ago. The researchers used advanced analytical techniques to investigate preservation conditions in Cambrian and Neoproterozoic rocks, finding that certain clays were essential for capturing early animal fossils.
Researchers have discovered exceptionally rich assemblages of plant spine fossils in central Tibet, confirming an early diversification of spiny plants around 39 million years ago. The findings suggest that a drying and cooling climate may have driven the evolution of physical defense mechanisms against large herbivores.
New laboratory experiments reveal that turbidity currents can enter cohesive muddy seabeds without losing their shape. A major earthquake at Lake Vättern, Switzerland, occurred around 11,500 years ago, and high-grade gold mineralization is linked to fault-valve processes in Papua New Guinea. Additionally, discoveries include the Ediaca...
A study in the Coll de Nargó archaeological site in Lleida has documented detailed records of four new dinosaur egg species, expanding our understanding of sauropod nesting habits. The discovery also sheds light on the geological formation of the region and its connection to French dinosaurs.
This new field guide delves into the geological history of the southeastern United States, spanning from the Triassic to the Precambrian period. The guide offers in-depth excursions along various regions, including coastal plains, highlands, and fault systems.
Researchers used synchrotron X-rays to reveal the last meal of ammonites, a group of extinct sea creatures that were distant relatives of squids and octopuses. The findings suggest that ammonites dined on plankton, which may have contributed to their extinction after a massive asteroid impact.