Students at Blount MountainLocation: Near Llano, TX Year: 1991 Merckslides catalogue number: 06-17208 Comments: The Llano Uplift is a weird region. First, it's a topographic depression despite being a structural uplift. Second, it exposes a patch of very old rocks (1.2 billion to 350 million years) that are distinct and anomalous among the flat Cretaceous limestons of central Texas. The 1.2 billion year old rocks at Blount mountain are folded and highly metamorphosed. A good place for students to learn about mapping deformed rock units. |
Landscape from Blount MountainLocation: Near Llano, TX Year: 1991 Merckslides catalogue number: 06-17210 Comments: The hill in the distance is Cambrian sediment filling a former graben valley. |