Tag Archives: oceans
Scientists rethink co-evolution of marine life, oxygenated oceans
Researchers have confirmed that rising oceanic and atmospheric oxygen ranges co-evolved with marine life a whole lot of thousands and thousands of years in the past. Geology News — ScienceDaily
Primordial oceans had oxygen 250 million years earlier than the environment
New analysis has pushed a serious milestone within the evolution of Earth’s surroundings again by about 250 million years. Geology News — ScienceDaily
Why did the Earth’s ancient oceans disappear?
We think of oceans as being stable and permanent. However, they move at about the same speed as your fingernails grow. Geoscientists have now found a novel way of mapping the Earth’s ancient oceans. Geology News — ScienceDaily
The oceans were colder than we thought
A team of researchers has discovered a flaw in the way past ocean temperatures have been estimated up to now. Their findings could mean that the current period of climate change is unparalleled over the last 100 million years. Geology … Continue reading
Fossil site shows impact of early Jurassic’s low oxygen oceans
Using a combination of fossils and chemical markers, scientists have tracked how a period of globally low ocean-oxygen turned an Early Jurassic marine ecosystem into a stressed community inhabited by only a few species. Paleontology News — ScienceDaily
Whales only recently evolved into giants when changing ice, oceans concentrated prey
A team of scientists have traced the evolution of whale size through more than 30 million years of history and found that very large whales appeared along several branches of the family tree about 2 to 3 million years ago. … Continue reading
First oceans may have been acidic
New research has looked to the distant past — all the way back to Earth’s earliest oceans. A newly developed model suggests that the early oceans, right around the time that life originated, were somewhat acidic, and that they gradually … Continue reading
Iron-dependent nitrogen cycling in a ferruginous lake and the nutrient status of Proterozoic oceans
Nature Geoscience 10, 217 (2017). doi:10.1038/ngeo2886 Authors: Céline C. Michiels, François Darchambeau, Fleur A. E. Roland, Cédric Morana, Marc Llirós, Tamara García-Armisen, Bo Thamdrup, Alberto V. Borges, Donald E. Canfield, Pierre Servais, Jean-Pierre Descy & Sean A. Crowe Nature Geoscience … Continue reading
Study opens new questions on how the atmosphere and oceans formed
Seawater cycles throughout Earth’s interior down to 2,900km, much deeper than previously thought, reopening questions about how the atmosphere and oceans formed. Geology News — ScienceDaily
A key role for green rust in the Precambrian oceans and the genesis of iron formations
Nature Geoscience 10, 135 (2017). doi:10.1038/ngeo2878 Authors: I. Halevy, M. Alesker, E. M. Schuster, R. Popovitz-Biro & Y. Feldman Nature Geoscience – Issue – nature.com science feeds