pay gravel

Pay gravel (1923)

Pay gravel: also known as "pay dirt"; a nickname for gravel with a high concentration of gold and other precious metals.

"I hain't struck it yet, boys," he would answer cheerily, leaning on his spade, "but the bedrock lies deep just hereabouts, and I reckon we'll get among the pay gravel to-day."

I mentioned the Siberian sand-bars that abounded with ancient mammoth bones; spoke of the large quantities of fossil ivory purchased from the Innuits by the Alaska Commercial Company; and acknowledged having myself mined six- and eight-foot tusks from the pay gravel of the Klondike creeks.