[See def.] Solenhofen slate or stone, a fine-grained variety of limestone, used esp. in lithographic printing, quarried in the upper beds of the Jurassic formation at Solenhofen in Bavaria. So Solenhofen bed.

1

1833–4.  Encycl. Metrop. (1845), VI. 634/1. Solenhofen beds. In the centre of the German Jura … occur beds of white fissile limestone, now universally employed in lithography.

2

1841.  Penny Cycl., XXI. 256/1. The Jurassic limestone of Solenhofen, commonly called the Solenhofen slate.

3

1882.  Encycl. Brit., XIV. 698/1. The Solenhofen stone, in its chemical decomposition, consists of lime and carbonic acid.

4