SH, this is right up your alley. This is right where i grew up in Arlington. Where present day ballpark is, we used to find fossils & shark's teeth, right along Johnson creek.
Good one Glenn, Years ago there was a site is SW Dallas that was described in one of the fossil text books. It was in a road cut of a major thoughofare!
Never do that again, chipping away for million yr old teeth very close to 80MPH bumper cars !
Just found the book for those interested in the experience of digging for fossils on an interstate !
ROADSIDE GEOLOGY OF TEXAS by Darwin Spearing. page 192
On I-20, 5 to 7 miles west of 45 the road decends into the mountain creek valley [ exit 458 ] on the south side of the highway, the white limestone beds of Austin chalk are exposed on the ridge top, ABOVE A GREY SECTION OF EAGLE FORD SHALE.
The Eagle Ford contact strata in this area is where the Shark & Ray teeth are found.
My penciled in note says " near Keist & 408 "
Better, safer, and eaisier on the nerves is to contact the Dallas Paleo club who are absolutly nuts about teeth expeditions. !