Gold mining in California, which had much more, is also over.
Fracking for oil in N. Dakota is in sharp decline not just because of low prices and debt, but the best supplies were extracted.  Fracking for shale gas in Texas and Louisianaa / Arkansas also declined due to depletion.  Fracking plans for oil in California were a fizzle - the early estimate was 15 billion barrels, the current estimate is 26 million.  Not a typo ...

If we were smarter and emphasized our cooperative nature we'd focus on relocalizing food, community cooperation, energy efficiency, learning to live well with less.  The Earth is round and finite but our economic models pretend it is getting bigger.  Neither political party (D / R) dares mention limits to growth or that we're having a harder time keeping oil and gas rationing at bay.  Denial is a renewable resource.