Large mounds

[Don Nelsen]

Lurch,

Thanks for the reply and for the link to the study. Good information. If these mounds are old root balls they must be very old since there is not the slightest trace of tree remnant. There is good lidar for the area and you can just barely see the rows and mounds. There is also another area that lidar shows to be similar or the same a short distance away.

Here is a short video I took:

https://www.youtube.com/watch?v=ey75pMU ... e=youtu.be

dn