- petrol bomb,
- petrol engine,
- petrol pump,
- petrol station
Origin of petrography
Examples from the Web for petrography
Thus from mineralogy and petrography it contains information regarding the origin and subsequent mutations of minerals and rocks.
A faint buzz above the ceiling witnessed that petrography, too, was active.Ann Veronica|H. G. Wells
Petrog′lyphy, the art of writing on rocks or stones; Petrog′rapher, a student of petrography.
Petrography and laboratory psychology were among the new sciences fostered by the new university.
A more general name sometimes employed is that of Petrography.The Chain of Life in Geological Time|Sir J. William Dawson