Sentences with word «mudstone»

That tectonic action boosts temperatures in the layers of mudstone and volcanic ash that fill in the trough.

The thick mudstone layer known as the Morrison Formation was deposited on top of the Sundance Sea as it disappeared in the late Jurassic.

A step forward that non-specialists neither know nor care about (eg New fossil forces radical rethink in mudstone geology)

This last hole generated dark green to black ash - rich mudstone at a depth of 53.4 m. Management hasn't seen this before, and assumes that this type of claystone doesn't differ a lot recovery-wise, and just has a different color, but has to sample and test this first of course to be sure.

Five samples have been analysed by CheMin so far, namely a soil sample, three samples drilled from mudstones and a sample drilled from a sandstone.

Stracher mentions a 100 - foot - high burning «gob pile» (containing pieces of coal mixed with mudstone) near Birmingham, Alabama.

In samples of fine - grained deposits and drilled mudstone, the Mars rover Curiosity discovered «fixed» nitrogen — a chemical form in which the ultrastrong bond in nitrogen gas, or N2, has broken.

And I'd have to say that if I have to save my life by winning an argument with oil men in a bar in Midland, Tex., on this topic, I would go in with some lumps of black mudstone from the ancient rock record, I'd go in with the established figures on our present input of carbon dioxide, and I'd say which bit of this observational science do you guys quarrel with, and why?

The nearly complete skeleton, unearthed from 160 - million - year - old mudstone deposits in northwestern China's Junggar Basin, extends the fossil record of alvarezsauroids back in time by a whopping 63 million years — making it about 15 million years older than the earliest known bird, Archaeopteryx.

The answer, a historic «yes,» came from two mudstone slabs that the rover sampled with its drill.

They found the urchins indeed excavated their own cozy cavities within a few months, with shallower pits and flatter urchins occurring on granite reefs, and deeper pits with taller urchins on sandstone and mudstone reefs.

Two of the samples come from drilling at a place called Sheepbed mudstone and the third sample is generally believed to be representative of the global Martian dust.

Its robotic arm drilled a 2.5 - inch borehole in mudstone bedrock.

The Marcellus Shale formation, an organic - rich mudstone running from West Virginia to New York, was one of the first to be exploited by fracking.

But Yaoming Hu, a vertebrate paleontologist at the American Museum of Natural History in New York, recently found the oldest known primate, named Teilhardina asiatica, in the 55 - million - year - old red mudstone of southern China.

But already, Curiosity has had opportunities to use a wet chemistry cup on two different mudstones that preserve organics.

The Morrison Formation comprises mudstone, sandstone, siltstone and limestone and is light grey, greenish gray, or red.

Just a few hours north of Adelaide, the 367 - square - mile Flinders Ranges National Park encompasses 3,900 - foot - high peaks, cavernous gorges of craggy mudstone and shale, and wildlife - spotted plains.

Stroll along the beach beneath mudstone cliffs, where golden sand ensconces dozens of spherical boulders at the tide line, many weighing several tons and stretching 10 feet in diameter.

And here's a nice NASA video describing the instrument package that tests the drilled material extracted from a bit of Martian mudstone:

The Changhsingian (latest Permian) Dalong Formation is composed of grayish - black cherty beds and cherty mudstone with deep - water assemblages including the bivalve Hunanopecten sp., ammonoid Pseudotirolites sp. and radiolarian Flustrella sp. 56.

The first hole also generated dark green to black ash - rich mudstone, starting at around 50m depth, just like a few other, earlier holes did in the 2017 program on Dean.

The fascinating thing that seems to be emerging is, as we look at... the 1,000 - year timescales going back to 183 million years, other past warming events where we get these black mudstones, we find that whatever the starting conditions, amazingly you get the same outcome.

The sandstone overlies a layer of mudstone.

Preliminary indications are that the rock contains a more diverse mix of clay minerals than was found in the mission's only previously drilled rocks, the mudstone targets at Yellowknife Bay.

In a study published today in PLOS ONE, scientists spent a year observing purple sea urchins (Strongylocentrotus purpuratus, pictured above) growing on sections of sandstone, mudstone, and granite reefs that had been transported into a laboratory setting.

When he opened them, he could more clearly see the gray fossil poking out of the bleached sand and mudstone, and he realized that he had found the jawbone of a hominin — a member of the human family.

The 250 - meter - thick band of sandstone — porous, crumbly rock that traps the gas in the minute spaces between its particles — is topped by a relatively impermeable 200 - meter - thick layer of shale and mudstone (think hardened clay).

Farley and his colleagues determined the age of the mudstone to be about 3.86 to 4.56 billion years old.

One reason is that mudstone is a sedimentary rock — formed in layers over a span of millions of years from material that eroded off of the crater walls — and thus the age of the sample drilled by Curiosity really represents the combined age of those bits and pieces.

In March, Curiosity drilled holes into the mudstone and collected powdered rock samples from two locations about three meters apart.

Using the SAM mass spectrometer to measure the abundance of three isotopes that result from cosmic - ray bombardment — helium - 3, neon - 21, and argon - 36 — Farley and his colleagues calculated that the mudstone at Yellowknife Bay has been exposed at the surface for about 80 million years.

The smooth floor of Yellowknife Bay is made up of a fine - grained sedimentary rock, or mudstone, that researchers think was deposited on the bed of an ancient Martian lake.

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.

Bordering one surface, Liu noticed, was a small shelf of mudstone that bore a red patina.

In late 2014, Curiosity entered the Murray formation, another mudstone thought to be a lakebed from 3.5 billion years ago, as attested to by recently observed mud cracks.

Despite these hurdles, several years ago the team discovered chlorobenzene, a ring - shaped molecule containing six carbons, along with other chlorinated organics, using a sample from a mudstone Curiosity drilled at Yellowknife Bay near its landing site in Gale crater.

Farther up the mountain's flanks is another stretch of clay - rich mudstone.

The Stimson unit that the researchers discovered covers a mudstone layer that was deposited in a lake - like environment.

NASA's Curiosity Rover has been continuously examining younger geological features of Mount Sharp and at higher elevations, beginning with the mudstone layer located at the base of the mountain.

The sandstone, limestone and mudstone that were deposited in the area about 113 million years ago are part of the shoreline of what was an ancient sea.

Go see the mysterious sailing stones at Racetrack Playa, take in the panoramic vistas at Zabriskie Point and Dante's View, walk on sand dunes, explore the mudstone hills of the Badlands, climb down into a caldera, go on scenic drives, and gaze up at the stars at night.

These are called the Toledo Beds and consist mainly of thin bedded shales and mudstones, with some blue calcareous (calcium derived) sandstones and patches of limestone.

Even today, there are still boulders remaining in the mudstone that will, eventually, fall on to the beach as they come lose due to erosion!

And in the rock record what you see subsequently is the extinction event is recorded, and you see the draw - down over a period of 100,000 or 200,000 years of the carbon from the atmosphere, which is manifested on the floor of the ocean as a development of a carbon - rich mudstone.

At Cerrejón, tropical rains every spring and summer cut huge erosion channels in the shale and mudstone, sending fossils and bones to a watery grave in the crater far below.