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from article Unconformity
Four types of unconformity. (After C.O. Dunbar and J. Rodgers, Principles of Stratigraphy, John Wiley and Sons, 1957)
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from article Slate
Slaty cleavage in folded mica-rich rock near Walland, Blount County, Tennessee. (USGS)
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from article Orthoclase
Orthoclase crystal habits. (After C. Klein and C. S. Hurlbut, Jr., Manual of Mineralogy, 21st ed., John Wiley and Sons, 1993)
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from article Polar meteorology
Composites of polar regions as photographed by meteorological satellites. (a) Arctic, May 1989. (b) Antarctic, November 4–25, 1986. (From U. S. Air Force Defense Meteorological Satellite Program film, NOAA/NESDIS, CIRES/National Snow and Ice Data…
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from article Polar meteorology
Automatic weather station on the Antarctic ice sheet. (Photo courtesy of G. Wendler)
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from article Polar meteorology
Mean streamlines of the katabatic wind over the Antarctic ice sheet (a) as constructed from sastrugi directions and (b) as computed with an atmospheric model by T. Parish. Note the streamline concentrations indicating very strong winds.
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from article Climatology
Arctic sea ice extent for March 2020 was 15.05 million km2 (5.81 million mi2). The orange line shows the 1981 to 2010 average extent for that month. (Credit: National Snow and Ice Data Center)
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from article Climatology
The earth-atmosphere energy balance is the balance between incoming energy from the Sun and outgoing energy from the Earth, using 100 units of energy from the Sun as a baseline. (Credit: NOAA/National Weather Service)
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from article Climatology
Global map showing rainfall and snowfall. (Credit: NASA)
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from article Climatology
Annual variation of monthly mean temperature and precipitation at (a) Tatoosh Island, Washington, (b) Minneapolis, Minnesota, (c) New York, New York, and (d) Miami, Florida. °F = (°C × 1.8) + 32; 1 mm = 0.04 in.
