Portal:Earth sciences/DYK/9


 * ...that Louis Agassiz (pictured) was the first to scientifically propose that the Earth had been subject to a past ice age?
 * ...that Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), hornblende, and/or pyroxene?
 * ...that Black smokers are a type of hydrothermal vent found on the ocean floor?
 * ...that the troposphere is the lowermost portion of Earth's atmosphere and the one in which most weather phenomena occur?
 * ...that tuff is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption?
 * ...that Io is the most volcanically active body in the Solar System, due to the tides exerted upon the satellite by Jupiter?

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