Sentences with phrase «ancient lakes once»

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.

Not exact matches

Turning over rocks across the crater, the rover has compiled evidence of ancient water — a lake fed by rivers once occupied the crater itself — and organic compounds and other chemicals essential for life.

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.

With the help of a graduate student, Williams will look for a kind of mammoth proxy: sporormiella, a fungus that lives in the dung of large herbivores, and grains of ancient pollen that can reveal what kind of vegetation once grew around the lake.

The Sahara, which covers nearly a third of Africa, was once a lush savanna, teeming with wildlife, fish - filled lakes, and ancient humans.

Clay deposits and landforms suggest this ancient region once hosted lakes, rivers, and a delta, making it just the sort of place to dig for signs of possible martian life.

WATERY PAST Sandstone deposits laid down by ancient rivers on Mars, seen in this image from the Curiosity rover, indicate that Gale Crater was once a shallow lake.

The team analysed over 50,000 pieces of wood and nearly 36,000 pieces of flint from what was once probably a Homo erectus settlement on the shores of an ancient lake.

Ancient sediments that once resided on a lake bed and the ocean floor show sulfur isotope ratios unlike those found in other samples from the same time, calling into question accepted ideas about when the Earth's atmosphere began to contain oxygen, according to researchers from the U.S., Canada and Japan.

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.

The intrepid robotic explorer successfully completed its primary scientific objective when it discovered strong evidence early on in its mission that a place called Yellowknife Bay near its landing site, constitutes an ancient dried - out lake bed which was once filled with drinkable liquid water billions of years ago and could have sustained life — if any were present.

In 2013, rover found evidence that Gale Crater once had an ancient freshwater - lake environment that possessed the basic chemical ingredients to support microbial life.

The 1994 article describes the origin and history of this ancient breed which is thought to have originated in the Lake Van region of Turkey, once part of ancient Armenia.

Buchanan Lake, located in the Canadian High Arctic, once formed part of the ancient continent of Pangea downwind from the volcanic region known today as the Siberian Traps.

She saw smooth lake, ranks of reeds to her left that marched out from the shore until the water rose over their knees, a fortress of ancient rock and conifers on the opposite shore fifty metres away, and dead ahead the Castle of Far Off Ease, the lodge where they were staying, tiny in what she thought Dante had once called a «giddy distance.»