Turtle Rock (Pulpit Rock, Rostrum Rock) (GM-37)
In places, rugged masses of rock rise boldly above the general level of the old bedrock surface. One of the largest is Turtle Rock, at the site of Cass Station, 5 miles east of Logansport, where a large remnant mass of Devonian limestone is perched on a narrow base of Kokomo limestone of Silurian age. Turtle Rock, standing about 20 feet about the surrounding area, has the shape of a flattened hourglass.
Less spectacular table-like masses of rock are found nearby. One of these has been cut through by a road a short distance west of Turtle Rock. Some are large enough to have houses built on them; other smaller ones are used for "hazards" on the Logansport Country Club golf course.
Our Hoosier State Beneath Us: Geomorphology