TagCoal

Coalface

To be at the coalface means to be on the front lines–working at a practical level, rather than a theoretical one. The phrase is primarily British, and derives from the image of coal miners having direct contact with exposed ore. This is part of a...

Jet Black

Why do we say something is jet black? Does it have to do with the color of a 747’s exhaust? Or skid marks on the runway? Or something else entirely? We provide a color with a mineralogical answer. This is part of a complete episode. Transcript of...

valley fill

valley fill  n.— «Mountaintop removal is just what the name suggests. Peaks are cleared of trees. Giant steam shovels then scrape away the topsoil. The rock beneath is blasted away until the coal is exposed. Some blasts have lopped as much as 800...

Nazi fuel

Nazi fuel  n.— «This expensive coal-to-liquid process was later used by South Africa to meet its energy needs during its isolation under apartheid. And now what some people refer to as “Nazi fuel” is back—thanks in part to high oil prices and...