M is for millstone
Among the many European millstones, the geology of the French burrstone was prized for the effect of its quartz grain.
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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
N is for non-metallic
Annual non-metallic minerals are typically twice the value of metallic minerals, which takes a little of the sparkle out of gold.
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B is for blinding
An enterprising operator finds a solution to a geologic problem that had been in the making for 1.4 million years.
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C is for cactolith
Geologic jargon - though handy for triple-word scores - should be used in moderation.
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D is for diamond
Real diamonds are a girl's best friend, but synthetic ones opened up a whole new world for granite.
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E is for earth
The planet's layers - particularly the earth's crust - provide many of life's essential building blocks.
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F is for fuller's earth
Before putting on a wool cardigan, make sure you know how the wool was cleaned.
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G is for gnome
Possibly based on miners from Southeast Germany, ceramic gnomes feature the pointed red hat often worn by these miners.
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P is for pit
A gravel pit that was a source of happy childhood memories showcases the evolution of mining technology.
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Q is for quartz
This versatile mineral has been used in everything from ceremonial rattles to sonar transducers to quartz watches.
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S is for sunset crater
A scenic trek always includes an interesting landmark - a volcanic cinder cone.
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The Nation's top 25 construction aggregates producers
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Rocky VII -- All that glitters is not gold
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Rocky VIII -- Oceanfront property
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Rocky IV - Inner secrets
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Rocky VI -- Climate - A hot time in the old town tonight
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Rocky V -- The Bone Wars
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