Unusual Fossils Embedded in Ancient Sand ?

[RescueMJ]

Greetings from Inland Venice, FL. Pleistocene material.  This is an unusual fossil find for me.  It measures 6 inches long by 3 inches wide. It is 3.8 inches in height.   Two different sides are flat.   Photo A: overall image.  Multiple images show worn black fossils embedded in relatively smoothed, compacted silica. This item was recovered from sand/clay, calcium carbonate material in hole approx. 10 feet deep.  There were no other specimens with this type of composition recovered.  FYI:  Indian artifacts confirmed to 10,000 B.C. recovered within 10 miles. I have not previously recovered any Indian artifacts. I do not think this would be an implement/ancient tool.  I'm looking for feedback. Thanks in advance friends.

[GeschWhat]

There may be something fossilized showing in the last photo, but this looks like a conglomerate. If it was found in sand matrix, it likely spend time being tossed around in that sand before being buried. 

[Plantguy]

Hey Michael, yep I've seen and picked up similar cobbled sized pieces like this and agree with Lori that its a piece of conglomerate and likely because of its mixed composition has some fossil bits in there also. Kind of interesting to wonder about the high energy environment that it takes to jumble up all of those pieces together...I think the darker inclusions/irregular shapes/areas are likely phosphate pieces and since that locale has lots of rounded dugong fragments I wouldnt be surprised is there is a fragment or two of those pieces in there as well along with bits of other marine critters.  

Regards, Chris