luneburgerheyde

Updated: June 12, 2025

Ehrenberg has just discovered that an apparently sandy deposit, twenty feet in thickness, under the "Luneburgerheyde," is composed entirely of infusoria of a kind still living in the neighborhood of Berlin. This layer rests upon a brown deposit known to be ten feet in thickness. The latter consists, for one fifth of the depth, of pine pollen, which burns. The rest is of infusoria.

Elizabeth Cabot Cary Agassiz - Louis Agassiz: His Life and Correspondence