Why are ultramafic volcanics rare in rocks that are much younger than Archean in age?
Earth has cooled from its early stages because radiogenic heat production decreased. The Archean near-surface temperatures have not been high enough for ultramafic magma to reach the surface.
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Which pair of scientists won a Nobel Prize for a method of making monoclonal antibodies?
A) Guillemin and Schally B) Khorana and Nirenberg C) Milstein and Köhler D) Watson and Crick
The potential evapotranspiration of a location is controlled primarily by ____
a. total annual precipitation b. temperature c. vegetative cover d. precipitation intensity
Autotrophs are responsible for ____________________ productivity
Fill in the blank(s) with correct word
Please identify the word and/or phrase that does NOT fit the pattern.
A. temperature B. salinity C. thermocline D. pycnocline E. distillation