First appear thin layers of a very hard blue limestone, full of shells, and parted by layers of blue mud.
"Town Geology" by Charles Kingsley
But, how can a naturalist who had ever seen a piece of Derbyshire marble, or any other shell limestone, make that supposition?
"Theory of the Earth, Volume 1 (of 4)" by James Hutton
The limestone quarries out of which Paris is chiefly built consist wholly of these Shells.
"Atlantic Monthly, Vol. XII. September, 1863, No. LXXI." by Various
Lime is made by burning limestone, chalk, shells, or coral in a simple furnace.
"The Art of Travel" by Francis Galton
Fossil shells, Pterocles, found in arenaceous limestone (Durand).
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
It is a clayey limestone, impregnated with various shells.
"Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1" by John Franklin
Great quantities of the older shell limestone are found strewn in rolled masses on the beach.
"The Conquest of Canada (Vol. 1 of 2)" by George Warburton
But in the center of it was a tiny pool, rimmed by white sand and a shell-like lip of limestone.
"Hunters Out of Space" by Joseph Everidge Kelleam
Limestone beds are full of the fossil shells of creatures that lived in the shallow seas.
"Earth and Sky Every Child Should Know" by Julia Ellen Rogers
The word means shell limestone.
"Principles of Geology" by Charles Lyell