Sentences with phrase «when volcanic ash»

What about significant travel delays such as those experienced by travelers last year when the volcanic ash cloud halted air travel and forced travelers to extend their stays and / or try for alternative travel?

«When volcanic ash reaches the stratosphere, it remains for a long time,» explains Hufford.

Not exact matches

Ground - based remote sensing through ultraviolet and infrared spectroscopy is used to measure the composition of a volcanic plume, the column of hot volcanic ash, gas, and rock emitted when the volcano erupts.

The photo makes it seem like a dangerous place, but when I visited, the only volcanic matter that landed on my head was ash.

When Froese's lab identifies a core sample layer of volcanic ash from a known eruption in the area 3,595 years ago, it gives added confidence to the teams» timeline.

The crew initially mistook the ash for seaweed, but when they approached they were shocked «to find it [composed of] burnt cinders, evidently volcanic.

Lead author Dr Steve Roberts from BAS says: «When we first examined the sediment cores we were struck by the intense smell of the guano in some layers and we could also clearly see the volcanic ash layers from nearby Deception Island.

Marinatos's theory was bolstered in 1967 when he dug up the ruins of Akrotiri, a prosperous Minoan town on Thera that had been buried in volcanic ash.

The Indonesian supervolcano Toba had one of these eruptions about 73000 years ago, when 2800 cubic kilometers of volcanic ash was ejected into the atmosphere and rained down and covered enormous areas in Indonesia and India.

The evidence came to light in 2003 when Gonzalez, along with David Huddart of LJMU and Matthew Bennett of Bournemouth University in England, were studying a formation of volcanic ash in the Valsequillo Basin, south of Puebla.

When they analyzed it, they found that the seawater had dissolved components of the volcanic ash, allowing new binding minerals to grow.

Records of ancient sex — like the fossil that resulted when this couple was killed and covered by fine, poisonous, volcanic ash (above right)-- are unusual: There are only 33 other instances of preserved mating insects, most trapped in amber.

When we did the same experiment with sand and volcanic ash using Earth - like conditions, all of it came out.

This allows the researchers to use desert dust as an analogue for volcanic ash to test their system when they don't have a volcanic ash cloud to work with.

«When we had the volcanic ash identified, we were stunned, because that would make this stone tool one of the oldest artifacts in North America,» Patrick O'Grady, with the University of Oregon Archaeological Field School, who led the excavations at the Rimrock Draw Rockshelter, where the tool was found, said in a statement.

Others asserted the prints were indistinct and did not establish the characteristics of a fully extended stride, a deep heel strike and a nearly as deep (as when impressed on wet sand or moistened volcanic ash) «toe off», the impression left by the ball of the foot and toes when one, while walking, pushes off and shifts weight to the other leg.

The tracks are thought to have been made when the ancient hominins walked across wet volcanic ash.

When volcanic eruptions happen, the ashes of the same goes into the ocean.

Bentonite clay is actually volcanic ash and has been used throughout history for healing because it produces an electric charge that, when heated, has the ability to absorb toxins like a sponge.

How should her family prepare for the future when worldwide tsunamis wipe out the coasts, earthquakes rock the continents, and volcanic ash blocks out the sun?

When its construction was finally finished after 75 years or so, the building was covered in a thick layer of ashes from several volcanic eruptions.

We have plenty of experience in putting together great holidays for single travellers and, on the rare occasion when things go wrong — such as the volcanic ash disruption in 2010 or yet another strike — we have robust operational procedures.

The type and amount of trapped particles, such as dust, volcanic ash, smoke, or pollen, tell scientists about the climate and environmental conditions when the snow formed.

This concept is also imperative when considering insurance for a recent terrorist attack, a hurricane threatening your destination or volcanic ash clouds that could delay your flight.