I need give only one instance, namely, the manner in which the fossils of the Devonian system, when this system was first discovered, were at once recognised by palaeontologists as intermediate in character between those of the overlying carboniferous and underlying Silurian systems.
Adibide bat besterik jarri beharrik ez dut: sistema devoniarra aurkitu zenean, paleontologoak behingoan konturatu ziren sistema honetako fosilak, goian daukan karboniferokoen eta behean daukan siluriarrekoen bitartekoak zirela.