n. A shallow deposit of sandstone, shale and conglomerate in front of a rising mountain chain.
the GNU version of the Collaborative International Dictionary of English
n. A soft Tertiary sandstone; -- applied to a rock occurring in Switzerland. See Chart of geology.
The Century Dictionary and Cyclopedia
n. In geology, a name given in Switzerland to an important geological formation belonging in part to the Miocene and in part to a position intermediate between the Eocene and the Miocene.
Word Usage
"When they could get it to work properly, it would only last about 1 hour, then it would revert back to being slower than frozen molasse."