Welch Bluff

Lat/Long: 36.064716, -93.126730

This is a view looking east across the Buffalo River at Welch Bluff showing the normal fault zone that forms the southern margin of the Braden Mountain graben. On the hanging wall (on the left side of the image to the north), the contact between the Boone and Everton Formations is dropped below the river level. On the footwall (on the right side of the image to the south), the contact rises above river level. The graben system formed during the late Paleozoic (~250 Million years ago) in association with the Ouchita uplift. The fault is fairly quiet now. If it was active, we might see a change in the gradient of the Buffalo River here, but it is constant here.  The info about the fault was adapted from Hudson et al., 2011 and Hudson 2000. So check out those papers for more scientific detail!  For more information on how faults work, see the USGS page on faults.

Photo of Welch Bluff showing the offset of the geologic stratigraphic formations.

Photo of Welch Bluff showing the offset of the geologic stratigraphic formations.