Well, it exists everywhere that my oil company has drilled a well, and we've drilled tens of thousands. Maybe we're just lucky.
I see. In other words, your company has seen the successive layers of rock strata, with each layer containing the classic fossil restrictions just as depicted in high school textbooks. That would be very interesting indeed, since in actuality, as more and more fossils are found, the ranges of fossils keep increasing. The range of fossils from one supposed time period keeps extending and overlapping fossils ostensibly typical of another period of time in the past.