The diаgrаm belоw depicts а crоss sectiоn through the ground over a weathered fold on which you, a geologist, are walking, looking for dinosaur fossils. Note that the strata here are not horizontal--they have been deformed into a fold that has since been weathered and eroded such that the surface on which you are walking is flat. Because you, the geologist, don't have X-ray vision and cannot see underground while walking on the surface, you have to use the fossils that you discover in the strata to determine what kind of fold this is. If dinosaur type 2 is younger than dinosaur type 1, then this fold must be a(n):