1[usually as modifier] The penultimate Pleistocene glaciation in the Alps, possibly corresponding to the Saale of northern Europe.
- ‘Gunz, Mindel, Riss and Wurm are the names of four ice ages.’
- 1.1 The system of deposits laid down during the Riss glaciation.
Early 20th century: from the name of a tributary of the River Danube in Germany.
We take a look at several popular, though confusing, punctuation marks.