Big Old Grinder???

[Siwash]

Went kayaking on Sunday afternoon and came back with this lump. What do you think? the base is flat and scratched up; hard rock surface kind of bumply.

I"m guessing it's a tool of some kind, but don't know exactly. Grinder? What do you think this is?

 

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[IMAUDIGGER]

My untrained eye says it’s a river rock that shows wear from numerous winter floods.
Did it come from the stream bank?

 

[newnan man]

Seems it would be smoother if it was used for grinding but something put those groves in it. I'm guessing it's a natural rock.

 

[ToddsPoint]

I'd guess the glacier put those lines in the rock. Gary

 

[Gambrinus]

A picture of the flat side might be helpful.

 

[Siwash]

I know glacier striations. This was pulled from an area filled with mudrock and sedimentary rock, and it's an unusual kind of stone for the area. The base is flat. The major top groove is pretty wide. I appreciate that most celts will be smooth, but there's also a need for more raspy grinders, I think.

 

[Siwash]

Yes. But it stood out from the other stuff considerably.

 

[Siwash]

I'm reconsidering here: it occured to me that if I was using a grinder, I'd use the long side and whatever scratching would run in one direction.

I would think that's the usual usage.

The flat base really speaks to being a tool (yeah, I know rocks can have a flat side, but this is pretty more flat), though. The hard rock also does, being found in an area filled with soft rock.

 

[releventchair]

Maybe some poor soul in a gold field lacking a file touched up the edge of a shovel with it.

No indication of the areas context.
Desert S.W.? Maybe used on a battered machete.
A site on the East coast with known scrap metal being used to shape material?

Material looks like it would shed abrasive. So food/grain/nut grinding is out. Would be hard on the teeth.

Or it's just a scarred up rock.

 

[Relicgrubber]

Looks like plow scars. Could also be Prop scars from a boat motor. Either way not an ancient man made artifact imo...

 

[Tony in SC]

I'm also thinking glacier slider?

I'd guess the glacier put those lines in the rock. Gary

 

[IMAUDIGGER]

Was it found along a stream bed/bank?

All rocks have to be abused before they turn to sand.

 

[Jon Stewart]

It also may be an abrader used during the flint knapping process. Never know for sure will we?