Mystery Mounds

Rooftree

Explorer
Mar 24, 2017
397
636
79
Haddon Township
They are called prairie mounds, pimple mounds, or mina mounds. Thet are low naturally occurring hillocks, randomly distributed over level terrain.

You will find more detail on these mounds on the link below.

 

bobpbx

Piney
Staff member
Oct 25, 2002
14,692
4,863
Pines; Bamber area
They are called prairie mounds, pimple mounds, or mina mounds. Thet are low naturally occurring hillocks, randomly distributed over level terrain.

You will find more detail on these mounds on the link below.

Interesting. One thing they dont' mention in this Ron, is why they are shaped that way. Why not dunes like we have.
 

Rooftree

Explorer
Mar 24, 2017
397
636
79
Haddon Township
.
nteresting. One thing they dont' mention in this Ron, is why they are shaped that way. Why not dunes like we have.
Bob, your getting too geologicalific for me. But, I did find this.

'The origin of the mounds in all cases appears to be erosional and/or depositional. Those on level terrain are formed simply by deposition of “A” soil horizon material in clumps of bushes which, under desert conditions, grow in symmetrically rounded patterns."

These mounds are all over the place west of the Mississippi River, from Arkanasa out to Oregon/Washington state. Depending on location, they were formed by various geological/weather conditions. It was all prairieland out there at one time. Since 1830, tallgrass prairie lost in North America is estimated between 82-99 percent, which is more than any other major esosystem in North America.
 
Apr 6, 2004
3,620
564
Galloway
They are called prairie mounds, pimple mounds, or mina mounds. Thet are low naturally occurring hillocks, randomly distributed over level terrain.

You will find more detail on these mounds on the link below.


It is still a matter of debate, but the aeolian hypothesis makes sense (nabkhas). Perhaps @Spung-Man can chime in.

Another interesting and maybe even compelling hypothesis is that they were formed by gophers. Yes, gophers.




 
Apr 6, 2004
3,620
564
Galloway
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