Prehistoric Artifacts?

I welcome any information about these items (i.e., are they something or just rocks!!).  They were found in bags of Delaware River rocks used as part of a landscaping project.

Please e-mail me at:  cannonb@es.marywood.edu
 
 


#1 - Grinder?
 
 
 

This item has three finger indentations that fit perfectly in one's grip.  The bottom of the rock is flattened.

#2 - Holes
 The top 3 items have drill marks that look as if they were made with a reed.  The bottom 2 have holes drilled straight through.

#3 Notched Stones
 
 

These items all seem to be shaped, of the same material.  They each have a carved notch at the top and a flatter, worn groove at the bottom.

#3 Notched Stones
 Here are top views of the notched stones.

#4 Oblong Shaped Stones
 Each of these items appears to have been shaped.  There is a flat side to some of them and others taper to a thinner edge on one of the long sides.

#5 Sandstone Scraper?
 
 
 
 

This item is made of sandstone.  There is a flat bottom and what seems to be a handle on top that is slightly curved, fitting in one's fingers.

#5 Sandstone Scraper?
 Alternate view of sandstone scraper.

#6 Miscellaneous Stones
 Left:  1)  curved, shaped tool?

Middle from top:  1)  celt?  2)  grooved in middle, shaped on sides  3)  polished stone, flattened on one side, worn groove about 3/4 way around

Right:  1)  polished, shaped stone  2)  triangular stone, worn on sides, flattened on bottom  3)  two shaped oblong stones with single notches near the top

#7 Polished Shaped Stones
 All of these stones are smooth, shaped, and polished (I oiled them so you can seen the shine and grain).

#8 Smooth Shaped Stones
 Each of these stones is very smooth, seeming to have been shaped.  The bottom right has flattened surfaces.

#9 Petroglyph?
 My husband thinks these are just worm tracks.  They seem awfully intentional to me, though!  I will try to get a clearer image up soon.