Seafloor dating

Another problem relating oceanic crust and ophiolites is that the thick gabbro layer of ophiolites calls for large magma chambers beneath mid-ocean ridges.

Seismic sounding of mid-ocean ridges has revealed only a few magma chambers beneath ridges, and these are quite thin.

These chemical differences extend to a range of trace elements as well (that is, chemical elements occurring in amounts of 1000 ppm or less).

In particular, trace elements associated with subduction zone (island arc) volcanics tend to be high in ophiolites, whereas trace elements that are high in ocean ridge basalts but low in subduction zone volcanics are also low in ophiolites.

In detail there are problems, with many ophiolites exhibiting thinner accumulations of igneous rock than are inferred for oceanic crust. In 2015, newborns diagnosed with NAS remained in the hospital 12 days on average, compared to three days for newborns not born exposed. – In the first long-term study of New Hampshire’s bumblebee population, researchers at the University of New Hampshire have found three of the state’s most important bumble bee species have experienced drastic declines and range constriction over the last 150 years, with a fourth bee... – From 2005 to 2015 the number of infants diagnosed with neonatal abstinence syndrome (NAS) in the Granite State increased fivefold, from 52 to 269, according to new research by the Carsey School of Public Policy at the University of New Hampshire. – Nature lovers beware, environmental models used by researchers at the University of New Hampshire are showing that the effects of climate change could be much stronger by the middle of the 21st century, and a number of ecosystem and weather conditions could consistently decline even... The crystallization order of feldspar and pyroxene (clino- and orthopyroxene) in the gabbros is reversed, and ophiolites also appear to have a multi-phase magmatic complexity on par with subduction zones.Indeed, there is increasing evidence that most ophiolites are generated when subduction begins and thus represent fragments of fore-arc lithosphere.

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