Question

question 28 (1 point) the cripple creek mining district, home of the last big gold rush in the continental united states, took so long to find because a) the land was being used for ranching. b) no one thought gold could come from a collapsed volcanic caldera. c) the region did not appear to have the right geology for gold. d) the area was too rugged and inaccessible.

Explanation:

The Cripple Creek mining district's gold - bearing rocks were in a collapsed volcanic caldera, a geological setting that was not expected to host gold deposits at the time of exploration. This unexpected geology is what made it take so long to discover.

Answer:

B. no one thought gold could come from a collapsed volcanic caldera.