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In geochemistry, paleoclimatology and paleoceanography δ 18 O or delta-O-18 is a measure of the deviation in ratio of stable isotopes oxygen-18 (18 O) and oxygen-16 (16 O). It is commonly used as a measure of the temperature of precipitation, as a measure of groundwater/mineral interactions, and as an indicator of processes that show isotopic fractionation, like methanogenesis.
Polymetallic nodules on the deep seabed in the CCZ Example of manganese nodule that can be found on the sea floor. Polymetallic nodules are found at depths of 4–6 km (2.5–3.7 mi) in all major oceans, but also in shallow waters like the Baltic Sea and in freshwater lakes.
This section contains a list of completed and topped-out buildings in Saudi Arabia that stand at least 492 feet (150 m) tall, based on standard height measurement which includes spires and architectural details, but excludes antenna masts.
The Tibetan and Andean Plateaus present one of the largest differences in daily temperature on the planet, as does the Western US and the western portion of southern Africa. High desert regions typically have the greatest diurnal-temperature variations, while low-lying humid areas near the shores (tropical, oceanic, and arctic) typically have ...
Lampreys live mostly in coastal and fresh waters and are found in most temperate regions. Some species (e.g. Geotria australis, Petromyzon marinus, and Entosphenus tridentatus) travel significant distances in the open ocean, [13] as evidenced by their lack of reproductive isolation between populations.
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion.The ton of TNT is a unit of energy defined by convention to be 4.184 gigajoules (1 gigacalorie), [1] which is the approximate energy released in the detonation of a metric ton (1,000 kilograms) of TNT.
DC Universe Online (DCUO) is a free-to-play massively multiplayer online game [2] set in the fictional universe of DC Comics.Developed by Dimensional Ink Games and co-published by Daybreak Game Company and WB Games, the game was initially released in January 2011 for Windows and PlayStation 3.
Water quality scientists ensure that these global standards and other compliance requirements are met in three areas - groundwater, surface water (lakes, rivers, ponds, etc.), and drinking water. [52] "The fact that water is the lifeblood of our planet means that there are thousands of opportunities for environmental workers in this area".