This is completely blown apart (pardon the pun) by the K-T boundary containing the element iridium from the asteroid impact.The thing is ... (and correct me if I'm wrong) ... you view geology vertically, whereas I view it horizontally.
Like a ladder, you see trilobites on the bottom rung, dinosaurs on the middle rung, and man on the top rung.
Whereas I see the ladder "lying on the ground", with trilobites, dinosaurs, and man all on the same plane.
To you, each rung is an eon, with millions of years between them.
To me, each rung is a unit of time spanning 6025 years now.
The boundary can be found in numerous places around the planet where the sedimentary layers are exposed.
Fossils such as dinosaurs and ammonites are never found in the upper layers beyond the boundary.


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