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One common mistake is believing that species can be arranged on an evolutionary ladder from bacteria through "lower" animals, to "higher" animals and, finally, up to man.

Mistakes permeate popular science expositions of evolutionary biology.

Also during the Devonian Period, Gondwana began impinging upon Laurussia.

There is evidence that these two landmasses completely fused together during the Late have been produced from Devonian rocks in New York and Pennsylvania.

The union of the paleocontinents of Laurentia and Baltica occurred near the beginning of the Devonian to form a single landmass that has been referred to both as Laurussia and as Euramerica.

In the United States, the Marcellus shale runs across the Southern Tier and Finger Lakes regions of New York, in northern and western Pennsylvania, eastern Ohio, through western Maryland, and throughout most of West Virginia extending across the state line into extreme western Virginia.The fissile shales are also easily eroded, presenting additional civil and environmental engineering challenges.In petroleum geology, these black shales are an important source rock that filled conventional petroleum reservoirs in overlying formations, are an unconventional shale gas reservoir, and are an impermeable seal that traps underlying conventional natural gas reservoirs.New York’s Finger Lakes region has some of the best Devonian aged (416 to 359 million years old) rocks in the United States, and their exposure as a result of gorges and erosive waterfalls bring tourists of all ages and from all over the world.In addition to being beautiful, however, this area is also geologically intriguing to scientists, and has been the focus of many research endeavors.

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