Viruses might have helped transform dense bacterial colonies into a type of sedimentary rock that is frequently associated with underground oil reserves.
sediments
Posted inResearch Spotlights
How Do Deep-Sea Gravity Currents Transport Sediment So Far?
The first field measurements of turbidity currents flowing around submarine channel bends indicate spiral flow plays a key role in keeping sediment suspended for hundreds of kilometers.
Posted inEditors' Highlights
Tracking Deep-Earth Processes from Rapid Topographic Changes
Rapid elevation-rise in Turkey, tracked by marine sediments that now sit at 1.5 km in elevation, is linked to deep-Earth processes that can explain short-lived, extreme rates of topographic change.
Posted inEditors' Highlights
Untangling Sediment Transport Through River Networks
A stochastic sediment routing model for river networks is inverted to determine sediment source areas based on point observations of grain size and sediment flux at the basin outlet.
Posted inResearch Spotlights
Accounting for the Missing Silica in the Marine Sediment Cycle
Cosmogenic silicon-based estimates of the amount of biogenic silica stored in clays along continental margins could explain the large discrepancy in the nutrient’s global marine budget.
Posted inResearch Spotlights
Nonflood Flow May Be Major Driver of Delta Growth
Plants and fluctuating river flow work together to balance vertical sediment buildup with sediment delivery to the delta’s edge.
Posted inAGU News
Church Receives 2017 G. K. Gilbert Award
Michael Church will receive the 2017 G. K. Gilbert Award in Surface Processes at the 2017 American Geophysical Union Fall Meeting, to be held 11–15 December in New Orleans, La. The award recognizes a scientist who has made “a single significant advance or sustained significant contributions to the field of Earth and planetary surface processes” and “also promoted an environment of unselfish cooperation in research and the inclusion of young scientists into the field.”
Posted inNews
Storms May Have Produced Most Mediterranean “Tsunami” Deposits
A new analysis reveals that nearly all of the region’s sedimentary evidence ascribed to tsunamis, which dates back 4,500 years, corresponds to periods of heightened storminess.
Posted inNews
Caribbean Sediment Traced to 1755 Portuguese Quake and Tsunami
Archaeologists digging in Martinique chanced upon the first tsunami deposit from the earthquake found in the New World. The tsunami left a strong trace, it seems, because the wave went up a river.
Posted inResearch Spotlights
Tracing Land to Ocean River Transport with Cosmogenic Isotopes
Beryllium stored in marine sediments can help scientists study erosion and other environmental changes.