petrologistn.

1811 J. Pinkerton Petralogy I. Introd. p. xvii This unavoidable uncertainty has been well illustrated by the greatest of petralogists.

1867 Proc. Royal Soc. 1866–7 15 505 It must be admitted by every Petrologist, that no amount of purely mineral arrangement in a Metamorphic rock can disprove its claim to Organic origin.

1909 E. H. Shackleton in Geogr. Jrnl. 24 482 The shore party consisted of fifteen men, my companions being as follows:..Douglas Mawson, mineralogist and petrologist.

1990 P. Kearey & F. J. Vine Global Tectonics ii. 16 Conrad's model was readily adopted by early petrologists who believed that two layers were necessarily present in the continental crust.