This is an excellent place to see the relationship between faults in the exposed Austin Chalk and erosion along the faults. At the base of each fault is a pyramid of rubble and dirt, virtually pointing upwards to each fault. There are several along the exposure. A tree is growing in one of the rubble zones.
Pinnacle is a construction site for a new industrial park development.
It is just east of the Chalk Hill site, and somewhat west of the Bulk Mail Center site. There are not as many faults here as at the Bulk Mail Center. See photo below. Note the grassy wedges. Each points upward to a fault in the Austin Chalk.