Sentences with phrase «exposed rock surface»

IF we had say, a bowl of frigid ocean water — and we immersed a sun warmed rock into that bowl of frigid ocean water, till 70 % of it was covered — then whipped the exposed surface of the rock with air that was many degrees colder than the exposed rock surface --

According to the study's lead scientists, the new technique relies on measuring extremely small amounts of the nuclide that accumulates as cosmic rays strike exposed rock surfaces over long periods of time.

Not exact matches

Diapers worn at the pool, beach, or other location may end up being scratched on hard surfaces (concrete around pools, sand, rocks, shells, etc) or exposed to chemicals (chlorine in pools) and may damage your regular diapers.

WHAT CAUSES THEM: When magma — molten rock — rises through a vent in Earth's surface, it is exposed to air.

At 80 million years ago, wind would have caused this scarp to migrate across the surface and the rock below the scarp would have gone from being buried — and safe from cosmic rays — to exposed,» Farley explains.

Squeezed by 1.5 times Earth's atmospheric pressure yet buoyant under one - seventh Earth's gravity, humans on its surface would feel more like divers under an ocean than astronauts on exposed airless rocks in space.

He interprets Black Beauty as a volcanic rock that got exposed to a lot of water on the way up to the Martian surface.

Professor Kamber said: «Due to later tectonic forces, all the rocks of the once ~ 200 km - wide structure are now exposed at the surface rather than being buried.

More recently, geochemists have been gauging when river erosion removed most of the crust overlying a particular rock now exposed at the surface.

When basalt — a volcanic rock that makes up roughly 70 percent of the earth's surface — is exposed to carbon dioxide and water, a chemical reaction occurs, converting the gas to a chalk - like solid material.

When exposed to heat brought to the surface from water circulating in moderately hot, underground rock, the thermal - cycling of the biphasic fluid will power a turbine to generate electricity.

There, many kilometers deep, the carbonate rocks will be exposed to very high pressures and temperatures, converting the carbonate rocks back to the silicates and expelling CO2 and water — these gases will then find their ways to the surface through explosive volcanoes near the plate subduction boundaries.

School grounds should be inspected for potential hazards such as: • Verandah poles outside doorways, in thoroughfares or in situations where students are unlikely to see them, especially while running; • Steps and changes in level which are poorly proportioned, difficult to see or lack handrails; • Fencing, gates and railings which students climb and which have structural problems, sharp protrusions, splinters or other hazards; • Trip hazards at ground level — protruding drainage pit covers, irregular paving, cracks or tree roots in thoroughfares, broken off post or other remnants of old structures; • Loose gravely surfaces on slopes and where students run; • Slippery patches which may stay damp in winter; • Rocks which students can fall onto or throw around; • Embankments which students can slip down or which have protruding sharp objects; • Blind corners in busy areas; taps and hoses which are positioned where students play or walk; window glass at low levels through which students could fall; • Holes, cracks or exposed irrigation fixtures in ovals; • Trees or shrubs with poisonous parts, sharp spikes or thorns or branches at eye level; • Splinters and deteriorating timbers in seats, retaining edges and other wooden constructions; • sSeds or other areas with hazardous chemicals or machinery to which students have access; rubbish skips which students can climb into or around, or which place students at risk when trucks enter the school; • Areas within the site used for car parking when students are present; and, • Sporting equipment such as goal posts or basketball rings which have structural or other design or maintenance problems.

Here on Ambergris Caye, the oldest rocks exposed at the surface are Late Pleistocene and Holocene in age.

And still another bit of nonsense is how you describe the surface rock of your local «protecting» your city from earthquakes originating in the bedrock below, and how digging into that surface rock would expose the city to earthquakes.

Abrahm Lustgarten, the ProPublica reporter who has spent years exposing problems that have accompanied the country's gas and oil quests, sent a reaction to yesterday's post on a new study of pathways between deep gas - bearing rock and near - surface aquifers that prompted me to adjust one line.

Joerg Schaefer, a research professor at Lamont - Doherty, did the chemical analysis of the concentration of elements in the rocks using a process called surface exposure dating, which made it possible to figure out how long the rocks had been exposed.

The retreat exposes soil, rock, and ocean surfaces, which absorb light and heat, causing further melting.10, 11 (See Jakobshavn Isbræ and Helheim glacier hotspots for more information on albedo.)

Geothermal systems extract energy from water exposed to hot rock deep beneath the earth's surface, and thus do not face the intermittency problems of other renewable energy sources like wind and solar.

All this melting has begun to expose rock and soils (and ocean in areas where sea ice has melted), which in turn causes further melting, because darker surfaces absorb more heat.

The melting of glaciers such as Jakobshavn Isbræ has also begun to expose rock, soil, and ocean waters, which in turn causes further melting, because darker surfaces absorb more heat.

Also the rate of weathering (the primary long - term sink of surface carbon) is a function of the rate at which fresh rock is exposed by mountain building associated with plate tectonics.

The scientists brought their 1.55 metre cores to the surface in 1993, but it has taken another two decades for laboratory techniques to detect and interpret the significance of radioactive particle samples in the rock that could only have come from outer space — which is why scientists think the bedrock must have been exposed, possibly more than once.