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We began the trip with a visit to one of the Martin Marietta quarries in the Edwards Limestone, San Antonio's aquifer. Michelle Lee (left) was our guide.
The huge quarry gave us a great look at the texture and mineralogy of the limestone.
Missy takes a closer look.
We also stopped at a clay exposure nearby.
Andrew checks out a sample with Mary.
Pedernales Falls State Park. Can you see the bedding planes?
Dave and Eric get up close and intimate with a genuine Texas spring at Pedernales Falls.
The top of Enchanted Rock, a knob of granite basement rock, was a great place for frisbee!
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