About twenty feet below the "Cinder-bed" is a stratum two or three inches thick, in which fossil mammalia presently to be mentioned occur, and beneath this a thin band of greenish shales, with marine shells and impressions of leaves like those of a large zostera, forming the base of the Middle Purbeck.
"The Student's Elements of Geology"
Sir Charles Lyell
The bottom of the Liimfjord was covered with a vigorous growth of aquatic plants, belonging both to fresh and to salt water, especially zostera marina.
"The Earth as Modified by Human Action"
George P. Marsh
It is very remarkable that the zostera marina, a sea-plant, was destroyed even where no sand was deposited.
"The Earth as Modified by Human Action"
George P. Marsh