Were the Ohio Mound Builders the Last Remnants of the Cro-Magnons?

There is little difference between the Cro-Magnon and the Ohio mound builder's skull types. Most of the skulls of the mound builders in Ohio were described as having a furrowed brow that is reminiscent of the Cro-Magnon.  This same skull type is also found within the English barrows belonging to the Beaker People.  What the Ohio mound builders skulls don't look like are any of the historic Indians from the Ohio Valley.