François Cyrille Grand'Eury (9 March 1839, Houdreville – 22 July 1917, Malzéville) was a French geologist, paleontologist and mathematics teacher.
He studied at the École Loritz in Nancy and at the École des mines in Saint-Étienne, and later worked as a mining engineer in Roche-la-Molière.
[1] From 1863 to 1899 he taught classes in mathematics at the École des mines in Saint-Étienne, where in 1883 he received the title of professor.
He is credited with establishing the chronological succession of floras associated with the coal seams of the Stephanian stage (named after the development of this stage at Saint-Étienne).
He conducted exhaustive studies of coal flora (Cordaites, Calamites, et al),[3] and in 1877 described the genus Tubiculites.