Blanco River The Texas Hill Country has two excellent dinosaur
footprint sites. One site on the Blanco River has clear tracks of quadrupeds. These tracks
are found in Glen Rose formation. On the banks of the Blanco River, one can see sheets of
Corbula, a bivalve index fossil. About 10-15 feet Boerne Lake Spillway Boerne Lake Spillway is a subtidal limestone in the Glen Rose formation known as submarine hard ground. The older layers hold many fossilized specimens of echinoids, gastropods, and clams. As you walk towards the middle of the spillway, you begin to notice indentations in the rock layer, which are the dinosaur tracks.
Unfortunately, the tracks are not readily available to
the public. The city of Boerne has plans to cover the tracks in
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below the Corbula bed, one can see
the clear imprints made by dinosaurs just at the water's edge. At first glance, the prints
look like indentations carved by erosion. Careful inspection will reveal the shape of the
foot and toe imprints.
The
tracks are actually of two separate bipedal dinosaurs. The larger tracks, possibly of a
theropod, show the animal moving north, then traveling northwest. At one point in the
larger track, smaller bipedal prints are seen crossing almost perpendicular to the larger
animal. As you look at both sets of tracks, you can see wavy laminations in the prints.
These laminations resulted from the dinosaurs walking on a tidal mat of blue-green algae. 
the future. However, perfect casts of the prints
are open to the public at the Cibolo Nature Center.