1804 R. Jameson I. 391 (heading) Friable lithomarge, or rockmarrow.
?1837 1 No. 5. 158 It..answers to the description of Lithomarge or rock-marrow.
1892 J. G. Bourke in 539 We are informed that the Tunguses of Siberia eat a clay called ‘rock marrow’, which they mix with marrow.