Curiosity reached the base of Mount Sharp in 2014 and has examined 600 vertical feet of rock which contains evidence
of the ancient lakes as well as groundwater.
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.
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.
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.
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.
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.
Joyce and his colleagues suggest instead that while surface waters
of the ancient lake were oxygenated, deeper layers were oxygen - poor and possibly saturated with carbon dioxide or other toxic substances.
Since desiccation mudcracks form only where wet sediment is exposed to air, their position closer to the center
of the ancient lake bed rather than the edge also suggests that lake levels rose and fell dramatically over time.
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).
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.
Data from the flyby showed evidence
of an ancient lake, now extinct, on the surface of the body.
One of them is the floor
of an ancient lake; another is a hot spring; and the third one is a site where hot water interacted with rocks in the shallow subsurface.
Remnants
of an ancient lake, the pans are interspersed with sandy desert and occasional vegetation.
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.
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;
Not exact matches
No golden plates, no chariots and steel and horses in
ancient America, and the Temple in Salt
Lake City is the center
of the grift universe!»
[246][248] Tourism Landmarks, National Border, Region and Terrestrial plain
of the 4th Republic
of Ghana Coastal Plain Accra, Apam, Cape Coast, Elmina, Kakum National Park, Kokrobite, Nzulezo, Sekondi - Takoradi, Ada Foah The Gulf
of Guinea coastal plain with the seat
of government and capital city, several castles and forts and the best preserved rainforest in Ghana Ashanti - Kwahu Koforidua, Kumasi, Obuasi, Sunyani Forested hills and the
ancient Kingdom
of Ashanti Volta Basin Tamale massive and world's largest
Lake Volta, the river system that feeds it and Ghana eastern border crossing Northern Plains Wa, Bolgatanga, Mole National Park Savanna plains and north Ghana trade route and border crossing
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.
Lake Superior is where it is because
of the Midwest's biggest geological feature: the Midcontinent Rift, an
ancient and giant 2,000 - mile - long underground crack that starts in
Lake Superior and runs south to Oklahoma and to Alabama.
The sediments, which contain evidence
of Inca farming including the remains
of seeds and mites that feed on llama dung, come from Marcacocha, a small
lake near Cuzco, Peru, at the heart
of the
ancient empire.
Walter mapped likely methane deposits across the region; quantified how much methane, formed when permafrost melts, is bubbling out
of current
lakes; and compared that with the amount emitted from methane - laden sediments taken from
ancient frozen
lakes.
Lake sediments have long been a rich trove
of clues to
ancient human history — but often only indirectly so.
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.
Around West
Lake, one
of Hangzhou's more famous sightseeing spots, famed for its willow trees, lotus blossoms and
ancient stone - arch bridges, public bike docking stations are set at every attraction.
An international team
of geologists has a new explanation for how the Midwest's biggest geological feature — an
ancient and giant 2,000 - mile - long underground crack that starts in
Lake Superior and runs south to Oklahoma and to Alabama — evolved.
Using
ancient DNA, along with the remains
of pollen, plants, and animals collected from
lake sediments, a new study has an answer: about 12,600 years ago.
On the heels
of a Russian drilling effort that reached
Lake Vostok, British and American teams also aim to penetrate
ancient subglacial
lakes
Today the Bodele Depression — the low point
of the vast
ancient basin in which modern
Lake Chad lies — is the most active dust spot in the world.
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.
Meanwhile, one
of the craters in the system,
Lake Avernus, was referred to as the entrance to Hades in
ancient mythology.
When Sengül Aydıngün first started surveying the shores
of Küçükçekmece
Lake in the western suburbs
of Istanbul, colleagues doubted she'd find any evidence
of ancient human settlement; other researchers had already surveyed the area and hadn't turned up much.
The Sahara, which covers nearly a third
of Africa, was once a lush savanna, teeming with wildlife, fish - filled
lakes, and
ancient humans.
To arrive at those conclusions, the researchers used sediment cores from
Lake Towuti, an ancient lake on the island of Sulawesi in central Indone
Lake Towuti, an
ancient lake on the island of Sulawesi in central Indone
lake on the island
of Sulawesi in central Indonesia.
As yet, no one has touched the waters
of a subglacial
lake with so much as a drill bit, but a Russian group that has been coring ice over Lake Vostok to get ancient climate records is coming cl
lake with so much as a drill bit, but a Russian group that has been coring ice over
Lake Vostok to get ancient climate records is coming cl
Lake Vostok to get
ancient climate records is coming close.
When you think
of archaea — perhaps the most
ancient life forms — extreme locations such as hot springs, alkaline
lakes, and wastewater treatment plants likely come to mind.
If the features are lined with residual salts, as one would expect
of ancient, dried - up
lakes or riverbeds, NASA may target them as future landing sites.
«Madder dye extracted from roots was often used to color textiles and leather in
ancient Egypt, and we see from the chemical mapping
of the portrait that the artist chose to paint the noblewoman's dress with madder
lake pigment, thus imitating contemporary practices.»
«As far as we know, this is the most acidic
lake and groundwater system ever found outside
of a volcanic area,» she says, adding that there's no evidence
of ancient volcanism in the U.S. Midwest.
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.
A series
of excavations by Jim Bowler, Alan Thorne, and others in the continental interior revealed that
ancient humans had fished and collected freshwater mussels along the shores
of the Willandra
Lakes 50,000 years ago, possibly earlier.
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.
-- and by the time Darwin got there, it was generally agreed that the shelves were actually
ancient beaches, each formed over hundreds
of years when the glen had contained a
lake — a
lake that for some reason had stood at three different levels on three different multicentury occasions.
During the Last Glacial Maximum when the Earth was much colder, closed - basin
lakes in currently dry parts
of western North America, the Middle East and South America were much larger than they are now, as evidenced by radiocarbon dating and other testing
of their
ancient shorelines.
A thin layer
of oxygen trapped at the bottom
of an Antarctic
lake seems to recreate the conditions on
ancient Earth
The fossil was recovered from sedimentary rock strata that were deposited in an
ancient lake roughly 55 million years ago, during the early part
of the Eocene epoch.
«
Ancient trail
of Columbian mammoths uncovered in south - central Oregon: University
of Oregon - led research team uncovers numerous footprints
of adult, juvenile and infant elephants in a remote dry
lake basin.»
The team collected samples
of methane from settings such as
lakes, swamps, natural gas reservoirs, the digestive tracts
of cows, and deep
ancient groundwater, as well as methane made by microbes in the lab.
Today fossilized coral makes its way into
Lake Michigan from Little Traverse Bay, near the northern tip
of the state's Lower Peninsula, where the
ancient rock layer is exposed.
Hakawai melvillei was a small wading bird that lived about 19 million years ago during the Miocene epoch, around an
ancient subtropical
lake on the edge
of a floodplain, with many other waterbirds, waterfowl, crocodilians and bats.
The waters, he eventually realized, could have come from catastrophic drainage
of Lake Missoula, an ancient, glacier - dammed lake in western Mont
Lake Missoula, an
ancient, glacier - dammed
lake in western Mont
lake in western Montana.