Taxonomy term

september 2014

Where on Earth? - September 2014

Clues for September 2014:

1. Established as a national monument in 1975, this mountainous, semi-arid area gained notoriety in the late 19th century as a prodigious source of plant and animal fossils dating from the Middle Eocene through the Miocene (from 44 million to 5 million years ago) and preserved in thick stacks of lithified ash and debris originating from volcanoes to the west.

Natural arsenic levels in Ohio soils exceed regulatory standards

A new study in which all 842 soil samples taken in Ohio had more arsenic than recommended by the Environmental Protection Agency (EPA) raises the question of what to do when natural background levels in the environment exceed limits set to protect ecosystems and human health.

31 Aug 2014

Floating nuclear plants may be safer from tsunamis

On March 11, 2011, a magnitude-9 earthquake just off the coast of Tohoku, Japan, set off a devastating tsunami that swamped the Fukushima Daiichi nuclear plant complex on the coast northeast of Tokyo. Backup generators failed, triggering nuclear meltdowns in three reactors that could no longer be cooled.

30 Aug 2014

Sunken logs a delicacy for ocean bottom-feeders

Wood isn’t often on the menu for deep sea-dwelling critters, but for some species, there’s nothing like a tasty tree stump for dinner. Five years after leaving bundles of Acacia wood 3,200 meters deep at the bottom of Monterey Canyon off the central California coast, biologists retrieved the bundles with a remotely operated vehicle and found that some hosted diverse colonies of organisms.

29 Aug 2014

Volcanic ash feed southern ocean plankton

Ash plumes from volcanoes in South America and elsewhere may spur large blooms of plankton in otherwise barren parts of the Southern Ocean, but maybe not for the reason scientists have suspected, according to a new study. Such blooms are of interest because they consume atmospheric carbon dioxide, although their overall effect on climate remains far from clear.

28 Aug 2014

The subcontinent's sturdy mammals

India is home to some hardy mammals, according to a new study in Proceedings of the National Academy of Sciences. Researchers reported that 20 of 21 mammalian taxa identified from fossils found in southern India have survived on the subcontinent over at least the last 100,000 years, with some lineages stretching back twice that long.

27 Aug 2014

Extra rib may be sign of mammoth decline

High rates of a congenital defect in woolly mammoths may offer evidence that inbreeding and environmental stress contributed to the animals’ demise during the Late Pleistocene, according to a new analysis of fossil mammoth neck bones.

26 Aug 2014

South American fossils offer revised view of Gondwana assembly

Fossils of a known age have been found for the first time in rocks in Brazil that, although long-studied, had previously eluded scientists’ attempts to pinpoint their age. The discovery of the marine animals dates the rocks to 550 million years ago, researchers say, offering important insights into the geological evolution and timing of the assembly of the former supercontinent Gondwana.

25 Aug 2014

Changing the landscape: Geoscientists embrace 3-D printing

The rapid proliferation of 3-D printing technology that began in the early 2000s sent ripples of excitement through the tech world and beyond despite the initial high price of printers. Now, more affordable printers have broken this barrier, and geoscientists have started testing the waters.

24 Aug 2014