Sentences with phrase «ancient sediment layers»
They had come to analyze ancient sediment layers, not to hunt dinosaurs.
http://discovermagazine.com/ Not exact matches
The elevated silica in halos was found over approximately 20 to 30 meters in elevation near a rock - layer of ancient lake sediments that had a high silica content.
In central China's Jishi Gorge, gray sediment layers — now well above the Yellow River — indicate an ancient lake created in a landslide and then released by a devastating earthquake.
Beth Shapiro at the University of California, Santa Cruz, gets first dibs on the samples since her team will take on the most sensitive test, at greatest risk of contamination during handling: the search for ancient mammoth DNA in the layers of sediment.
Instead, Grotzinger says, their model was meant to duplicate how chemicals and sediments might settle out of water in a hot ancient ocean rich with the calcium carbonate typically found in stromatolite layers.
Paleontologists sometimes build timelines from ancient ocean beds, where 100 million years of sediment layers are often stacked in one continuous sequence.
By measuring the bonds of prehistoric alkenones preserved in ancient layers of lake sediment, the team opened a window on Arctic temperature change since the end of the last Ice Age.
«Some of the observed features included ancient river beds, craters, massive extinct volcanoes, canyons, layered polar deposits, evidence of wind - driven deposition and erosion of sediments, weather fronts, ice clouds, localized dust storms, morning fogs and more,» NASA wrote in a summary of the mission.
These layered sediments indicates the presence of liquid water in the past — and possibly traces of ancient life.
Robert Smithson is interested in modern types of industry, quarries and salt lakes, prehistoric layers of sediment and puzzling ruins of ancient and modern civilisation.
A recent study of ancient lake - bottom sediments found layers of charcoal next to layers of shrub pollen, suggesting a close link between shrubs and wildfire.