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Use "nummulitic" in a sentence
"The Eocene, or older Tertiary, further appears with nummulitic formations on both sides of the eastern Balkans; the Oligocene only near the Black Sea coast at Burgas."
"The pyramids were nearly all made of nummulitic limestone composed of the remains of organic life; a material which belonged to the latest geologic ages, when whole generations and different platforms of life had come and gone."
"Upper Egypt, where the cretaceous and nummulitic limestones end."