1932, The Encyclopaedia Britannica Co., London, The Encyclopaedia Britannica Vol.17[1]:
The geologist was slow to be accepted in the oil industry. When he first appeared about 20 years ago he was placed in the same class with “oil witches” and “oil smellers.” The nicknames “rock hound,” “wrinkle chaser” and “pebble pup” date back to that time, not so long ago, when oil producers were either skeptical of the value of geology in oil production or quite convinced of its uselessness. To-day every producing company of any importance considers a geologist indispensable in their work.
1918, United States. Congress. House. Committee on Public Lands, Oil leasing lands[2]:
Of course, if A was out there either by himself, if he was something of a rock hound, or if he had employed a geologist and was tracing out the lines[…]
