Now don't you think its time to dig directly under your house there in Garland? Charles''
Looking at the sort of rock in all those pictures tells me you are sitting on a tectonic plate and theres a volcano nearby or directly under that area somewhere.
That limestone with quartz schistsz and chalk is a form of seabed that usually is found mixed with basalt and was formed by volcanic mud boiling up from some hot volcanic springs.
Plus in the picture on date: 5.16.2008, Photo 19 of 63, Called; PICT0012, Shows extra loose bones to what?
Just looked through your album of the massaursaurass. Lots of pictures. How is the excavation going? Saw your "Cool-a-top" hat. Saw a new version. Like the new version, the one with the wide brim. COOOL!