from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A shallow deposit of sandstone, shale and conglomerate in front of a rising mountain chain.
from 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.
from 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.
From French molasse, from Latin mollis. (Wiktionary)