- n. Plural form of xenolith.
“The deep interior of the North American craton is known only from so-called xenoliths - rock inclusions in igneous rock - or xenocrysts such as diamonds that have been delivered to the surface from deep below by volcanoes.”
“The rocks, called xenoliths, are from deep within Earth's mantle and crust, possibly more than 12 miles down.”
“Usually a geologist can distinguish these "xenoliths" from the younger minerals around them.”
“CO2-rich vapors trapped along with silicate melt in mixed inclusions within phenocrysts as well as ejected ultramafic xenoliths.”
“The next stop of the day was a granite outcrop that was an excellent example of erosion and xenoliths.”
“These allegedly ancient chondrite “snapshots” of the mantle are in many respects similar to modern xenoliths from deep mantle.”
“The abstract reports the results of U-Pb, U-Th and Ar-Ar age dating of granitoid rocks found in drillcore and as xenoliths from lavas at Medicine”
“A 40Ar/39Ar step-heating experiment on a potassium feldspar separate from one of these xenoliths (86-3) yielded an extremely regular plateau age of”
“However, U-Pb analyses of zircons from these xenoliths indicate crystallization ages of less than 100 ka.”
“In neither the sample from drillcore nor the granitic xenoliths did we find any evidence for relict zircons from either Sierran or Klamath terranes that might be expected to underlie the volcano.”
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