Sentences with phrase «ancient lake»

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.

Curiosity has also recently confirmed ancient lakes in Gale crater, meaning that this region was once potentially much more habitable than it is now.

There might even be fossilised Martian algae locked up in ancient lake beds, waiting to be found.

Like most other fossils recovered from ancient lake strata, the skeleton of Archicebus was found by splitting apart the thin layers of rock containing the fossil.

This hint of more oxygen in Mars» early atmosphere adds to other Curiosity findings — such as evidence about ancient lakes — revealing how Earth - like our neighboring planet once was.

Recently, scientists concluded from evidence in Mars's ancient lake on Gale crater that the planet once harbored a very Earth - like environment for about 700,000 years sometime between 3.1 and 3.8 billion years ago.

Case in point: Recently a cache of well - preserved fossils was found in ancient lake deposits in northeastern China and eastern Kazakhstan.

A local temple, which sits on top of a stack of ancient lake sediments, has a striking mural of Guru Rimpoche above a lake at the gorge entrance.

Scientists had assumed that a series of ancient lakes once scattered from Kansas to North Dakota were largely alkaline, because of the large quantities of salt found in the area's sandy reddish rocks that were formed when the lake evaporated about 270 million years ago.

But a new study published online by the journal Nature indicates ancient lakes that formed after permafrost fin the Arctic first melted roughly ten thousand years ago may in fact have a net climate cooling effect over long time scales.

Ancient lakes formed between 2.7 million and 2.5 million years ago, between 1.9 million and 1.7 million years ago, and finally between 1.1 million and 900,000 years ago, the scientists report in an upcoming Science.

Although scientists can learn about past climate by examining ancient lake sediments, in the Sahara the lakes dried up long ago and their sediments have blown away.

Ancient lakes across a huge portion of the western United States may have been so acidic their waters would have dissolved a person's skin.

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.

Bown thinks Egyptians hauled building stones weighing up to 3000 kilograms along the road on sledges, then loaded them onto boats on the shore of ancient Lake Moeris.

Curiosity is climbing a layered Martian mountain and finding chemical evidence of how ancient lakes and wet underground environments changed, billions of years ago, in ways that affected their potential favorability for microbial life.

These oil shales formed at the bottom of ancient Lake Messel and preserve the remains of mammals, birds, and other animals that were living near what is now Darmstadt, Germany about 47 million years ago (the Eocene epoch).

There's also evidence for ancient lake systems, like those at Gale Crater where NASA's Curiosity rover is currently exploring and at Jezero Crater where the next rover may land.

I note that one of the locked papers concerns research on the paleolimnology of other African ancient lakes.

«We could see where ancient lakes had been eroded by the river, so we could see the lakes in cross section,» she says.

They call it a 50 km ride, but it is really a 25 km slog uphill as we ride up from the lake past the shores of ancient Lake Algonquin (the waters edge after the ice age) and stop for a break at the high point;

In this case the former Lake Warren, (ancient Lake Erie) and its relative surface level.

Pink flamingos wade through blood - red lagoons on a seemingly endless plateau of snow - covered volcanoes, vast salt deposits and leftovers from ancient lakes that dried long before the first human ever stepped foot on the continent.

Antarctica's Friis Hills in the central Dry Valleys of the eastern portion of the continent contains ancient lake deposits indicating that the area has remained frozen for 14 to 17.5 million years.

She and colleagues studied more than 50 ancient lakes in parts of Siberia and Alaska.

Geologic evidence appears to confirm, however, that ancient lakes once formed on the surface.

Ancient lake sediments in China record epic temperature swings, biotic turnover before the mass extinction.

The color data will tip off scientists to the presence of clays, sulfates, and other minerals that may have precipitated out of ancient lakes.

Lying 150 kilometres north of Chad's capital, N'djamena, Lake Chad is one of Africa's great and ancient lakes, sustaining rural communities on the edge of the Sahara for millennia.

An ancient lake and evidence for flowing water today aid hopes that microbes evolved on the Red Planet

The dead organic matter was most likely sealed in when the Taylor glacier advanced over the ancient lake about 1.5 to 2 million years ago (Science, DOI: 10.1126 / science.1167350).

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.

Geologists had seen traces of an ancient lake in the arid region south of Khartoum in Sudan, but did not know when it dried up.

Curiosity has spent the last five years exploring an ancient lake bed.

And like the ancient lake that rookie rover Curiosity recently explored at Gale Crater (SN Online: 3/12/13), the water at Endeavour was just right for microbial...

COVER Clouds pass over Kenya's Lake Magadi, where geologists are drilling a core to gather detailed climate data from the ancient lake bed.

That the fossil was found in what was once an ancient lake bed suggests that this particular rodent may have made an unfortunate mistake — it may accidentally have landed on the lake and drowned.

Like all modern paleontologists, Therrien was acquainted with the spectacular feathered - dinosaur fossils of the Liaoning beds in China, where the idea that dinosaurs are the ancestors of birds got its biggest boost, thanks to the preservation of feathers — both the thread - like ones known as «dinofuzz» and the more familiar shafted kind — in the silky mud of an ancient lake bottom.

To arrive at those conclusions, the researchers used sediment cores from Lake Towuti, an ancient lake on the island of Sulawesi in central Indonesia.

Lake Towuti, an ancient lake on the island of Sulawesi in central Indonesia, has yielded a 60,000 - year sedimentary record of Indonesian climate.

So while the mudstone indicates the existence of an ancient lake — and a habitable environment some time in the planet's distant past — neither crater counting nor potassium - argon dating can directly determine exactly when this was.

Her analysis assumes the preserved droplets are identical to the ancient lake water.

The list of places where NASA's next Mars rover, due to launch in 2020, could land has been narrowed down to three: Jezero crater, the dry remains of an ancient lake; Northeast Syrtis, which used to host hot springs; and the Columbia Hills, previously explored by NASA's Spirit rover.

But the new findings suggest the Atacama's ancient lakes could have provided another path through the desert, and possibly even homes for South American settlers.

This ancient lake bed contains huge deposits of dead microorganisms that are loaded with phosphorus.

They stalked deer as the animals drank from an ancient lake and gathered hackberries and nuts from chestnut and walnut trees lining nearby rivers.

Aaron Putnam, a paleoclimatologist at the University of Maine, and Wally Broecker, a Columbia University climate scientist, looked for clues as to whether such shifts have happened before in various paleoclimate records, including the shorelines of ancient lakes and cave stalagmites.