New articles from the Geological Society of America's online-only journal, Geosphere, are now available. These new releases include three open-access articles, 'Geochronological imaging of an episodically constructed subvolcanic batholith: U-Pb in zircon chronochemistry of the Altiplano-Puna Volcanic Complex of the Central Andes;' 'Slab-rollback ignimbrite flareups in the southern Great Basin and other Cenozoic American arcs: A distinct style of arc volcanism;' and 'Extraction of three-dimensional fracture trace maps from calibrated image sequences.'
The July 2016 issue of the Geological Society of America's flagship journal, Geology, includes two open-access features: 'Pre-Mississippian tectonic affinity across the Canada Basin-Arctic margins of Alaska and Canada,' by David W. Houseknecht and Christopher D. Connors; and Hydrothermal alteration of seafloor peridotites does not influence oxygen fugacity recorded by spinel oxybarometry,' by Suzanne K. Birner and colleagues.
There have been several mass distinctions in the history of the earth with adverse consequences for the environment. Researchers from the University of Zurich have now uncovered another disaster that took place around 250 million years ago and completely changed the prevalent vegetation during the Lower Triassic.
Our ancestors evolved three times faster in the 10 million years after the extinction of the dinosaurs than in the previous 80 million years, according to UCL researchers. The team found the speed of evolution of placental mammals -- a group that today includes nearly 5000 species including humans -- was constant before the extinction event but exploded after, resulting in the varied groups of mammals we see today.
The $5.6 billion Panama Canal expansion created an unprecedented opportunity for Smithsonian scientists to collect thousands of fossils and to study invasive species, environmental services and climate change. The post-panamax ships going through the canal will have less chance of colliding with whale mothers and their calfs as a result of another Smithsonian study.
A new study of the 37,000-year old remains of the 'Deep Skull' -- the oldest modern human discovered in island South-East Asia -- has revealed this ancient person was not related to Indigenous Australians, as had been originally thought. The Deep Skull was also likely to have been an older woman, rather than a teenage boy, the UNSW Australia-led research shows.
New work from Carnegie's Peter Driscoll suggests Earth's ancient magnetic field was significantly different than the present day field, originating from several poles rather than the familiar two. Then, shortly after our planet's core solidified, Driscoll's work predicts that Earth's magnetic field transitioned to a 'strong,' two-pole one.
Those who go to a masked ball consciously slip into a different role, in order to avoid being recognized. Insects were already doing something very similar in the Cretaceous: They cloaked themselves in pieces of plants, grains of sand, or the remains of their prey, in order, for example, to be invisible to predators. An international research team, with participation from the University of Bonn, has now investigated such 'invisibility cloaks' encased in amber.
By scanning the fossil remains of mammal-like reptiles from the Karoo of South Africa, Dr. Julien Benoit and his colleagues from the University of the Witwatersrand, found that these reptiles, called therapsids, may have evolved hair, and the use of whiskers as a sensory tool in order to operate at night well before the Mesozoic age.
An international team of researchers has discovered the oldest fossil evidence of agriculture, not by humans, but by insects.