Sentences with phrase «stalagmites in»

The scientists have a hypothesis that they can look at the growth of stalagmites in certain caves and correlate the annual growth rate with climate conditions.

Aharon recognized the potential of stalagmites in the caves to provide clues on Earth's past climate.

To reach further back, the team relied on natural stand - ins, or proxies, that include ice cores, ocean and lake sediments, mineralized «rings» from slices of stalactites or stalagmites in caves, coral growth rings, and tree rings.

You then have to crawl for about 20 feet before you enter an enormous underwater cavern with stalactites and stalagmites in every direction as far as the eye can see.»

Observe stalactites and stalagmites in caves that contain pottery and ceremonial remnants of the ancient Maya.

Enter the Mayan underworld to observe natural history dating back millions of years as you hike and swim through a 600 - meter route full of awe inspiring stalactites and stalagmites in this protected nature reserve river.

Although you'll have less to explore while snorkeling, you'll still get to enjoy the amazing rock stalactites and stalagmites in the crystal clear water.

Uranium - series uses the decay of uranium and thorium isotopes (238U, 235U and 232Th) in calcites in particular, such as stalactites and stalagmites in caves.

Humankind's close evolutionary cousins built large, circular structures out of stalagmites in a French cave around 176,500 years ago, researchers say.

The study of five stalagmites in Roaring Cave north of Ullapool in north - west Scotland is the first to use a compilation of cave measurements to track changes in a climate phenomenon called the North Atlantic Oscillation.

And the upward rate of growth of stalagmites in the cave is very sensitive to rainfall — the more water in the peat, the more slowly the stalagmites grow.

In this case, the researchers combined records of ancient lake levels, location and extent of glaciation, variations in the composition of stalagmites in caves, and evidence for changes in vegetation and subsurface soil deposits associated with water table depth.

Neanderthals built one of the world's oldest constructions — 176,000 - year - old semicircular walls of stalagmites in the bowels of a cave in southwest France.

Rhawn Denniston (right), professor of geology at Cornell College, with Dan Cleary» 13, a member of his student research team, examining stalagmites in an Australian cave.

Other research on stalagmites in China has shown that the East Asian monsoon changed at the same time as the Heinrich and Dansgaard - Oeschger climate changes.

To find out, Valerie Trouet at the Swiss Federal Institute for Forest, Snow and Landscape Research in Birmensdorf and colleagues studied the growth rate of trees in Morocco and a stalagmite in Scotland, both dating back 1000 years, to determine rainfall levels during the MCA.

This is a photo of the small stalagmite in the Mawmluh cave before it was collected.

In the laboratory, Carolin sawed each stalagmite in half, opening it like a hot dog bun.

Carved on a stalagmite in the large chamber are several simple faces one on top of the other.

The vertical sculpture, Corner, resembles rock formations in a canyon, or the fusing of a stalactite and stalagmite in a cavern.

I couldn't stop laughing at the chart showing data derived from one stalagmite in one cave that is then extrapolated to the planet as a whole.

Not exact matches

This time you can clearly see several previous peaks, along with those double stalagmites of the recent highs (tested again, incidentally, since this graph was created in 2010).

Researchers looked at the ratios of two forms of oxygen atoms in the minerals deposited in layers in two stalagmites that had formed in a cave in the Himalayan foothills about 200 kilometers north of New Delhi.

Combining new data with those garnered previously from another stalagmite from the same cave provides a continuous climate chronicle that stretches back more than 5700 years, the researchers report today in Science Advances.

Matching the models with stalagmites There was a much clearer correlation between less rainfall in the region and the Heinrich events, Carolin said.

The results from the Carolin paper, with real data from real stalagmites, are almost «exactly what the model predicted in 2011,» he said.

«Our results show for the first time that wildfire changes cave dripwater chemistry, and this chemistry will be preserved in stalagmites,» says Nagra.

Due to the way stalagmites and stalactites grow, the layers in the middle of these structures preserve older environmental information, while those closer to the surface hold clues to the more recent past.

The value of this information is illustrated by the results of a study published May 19 in the journal Geophysical Research Letters by Oster's group, working with colleagues from the Berkeley Geochronology Center, the Smithsonian Institution National Museum of Natural History and the University of Cambridge titled «Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India.»

Because of the large amount of water running into the cave, the stalagmite they choose to analyze had grown about 2.5 centimeters in 50 years.

However, the climatic and precipitation data stored in the stalagmite showed a clearly higher age.

Today we can only guess as to why a group of Neanderthals built a series of large stalagmite structures in a French cave — but the fact they did provides a rare glimpse into our extinct cousin's potential for social organisation in a challenging environment.

The stalagmite structures are 50 centimetres high in places, says Jaubert.

They also used standard radiometric techniques to date stalagmites from Eagle Cave, which gave them information about fluxes in precipitation during the time the glaciers covered the land.

Denniston noted that the variations over time in the numbers of flood events recorded by his stalagmites matched reconstructed numbers of hurricanes in the Atlantic, Gulf of Mexico, and Caribbean.

His work in Australia began in 2009 and was originally intended to focus on the chemical composition of the stalagmites as a means of reconstructing past changes in the intensity of Australian summer monsoon rains.

Angelique Gonzales» 14, who worked with Denniston on the research and is third author on the paper, examined nearly 11 meters of stalagmites, measuring them in half millimeter increments and recording the location and thickness of mud layers.

The article, «Extreme rainfall activity in the Australian tropics reflects changes in the El Niño / Southern Oscillation over the last two millennia,» presents a precisely dated stalagmite record of cave flooding events that are tied to tropical cyclones, which include storms such as hurricanes and typhoons.

Stalagmites, which crystallize from water dropping onto the floors of caves, millimeter by millimeter, over thousands of years, leave behind a record of climate change encased in stone.

But Denniston and his research team found more than just variations in the chemical composition of the stalagmites they examined; they discovered that the interiors of the stalagmites also contained prominent layers of mud.

The water stirred up the sediment and when the water receded, the mud coated everything in the cave — the floor, the walls, and the stalagmites.

Thus, the researchers interpreted the flood layers in their stalagmites largely as recording tropical cyclone activity.

The research used stalagmites collected from Heshang Cave in central China within the Yangtze River drainage.

Researchers measured the magnetic properties of layered stalagmites, or columnar mineral deposits formed in caves by the growth of carbonate minerals from dripping groundwater.

The authors could make a stronger case for Neanderthals if they can show, for instance, that the stalagmite pieces are uniform in size or shape and therefore selected.

Marie Soressi, an archaeologist at the Leiden University in the Netherlands, says that it is no surprise that Neanderthals living 176,000 years ago had the brains to stack stalagmites.

Geoscientist Anton Vaks of the University of Oxford led an international team of experts — including the Arabica Caving Club in Irkutsk — in sampling the spindly cave growths known as stalagmites and stalactites across Siberia and down into the Gobi Desert of China.

Researchers linked dated graffiti about droughts in a cave in China to physical evidence in the cave of the water shortages, such as changes in ratios of stable isotopes in specific layers of stalagmites

Back at their Georgia Tech lab, they analyzed the stalagmites for the ratio of oxygen isotopes contained in samples of calcium carbonate, the material from which the stalagmites were formed.

While the stalagmite record reflected responses to abrupt changes known as Heinrich events, another major type of event — known as Dansgaard - Oeschger excursions — left no evidence in the Borneo stalagmites.