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One word pinned here

Colorado

39.0000°N -105.5000°W · Q1261

One English word in this atlas traces back to Colorado. It sits in United States.

All of United States
Pinned here
beidellitenoun · 1925
Well attested

The material from the place the mineral is named after turned out not to be the mineral.

E. S. Larsen and E. T. Wherry proposed the name beidellite in 1925 for clay from Beidell, Colorado. When the Smithsonian material was re-examined, the Beidell specimen R4761 proved to be a mixture, so the working reference specimen is R4762 from the Black Jack mine in Idaho. Beidellite is now one of the standard end members used to classify swelling clays.

Named from the placeRead →
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