The scientists looked in an area that is inhospitable to most living things today, because they knew that (a) the area dated to the right time in the geological past to be in the transitional period, and (b) at that time it had the right kind of environment for such life - it was not a lucky find in a rock quarry (like Archaeopteryx), but one based on research and prediction, in turn based on previous evidence and evolutionary theory. Where and when, consistent with geology and evolution.
Translation: They looked where they knew a certain layer of the worldwide geological column would most likely be found, that would contain fossils of a certain type according to the ordering of fossils found in most parts of the geological column, along with certain characteristics of the rock normally associated with the kind of fossil they were seeking -- it was not a lucky find in a rock quarry (like Archaeopteryx), but one based on research and prediction, in turn based on previous evidence and the ordering of the geological column. Where and when, consistent with geology and the Flood.