Abstract
Pedogenic carbonate nodule concentrations are an under-utilized resource for the recovery of terrestrial microvertebrate faunas. They have proved productive in Late Cretaceous, late Paleocene, and Miocene rocks of Texas and Louisiana. These concentrations of nodules and fossils form at channel bases and by erosion of soils in interfluves. Treatment of large samples of the conglomerates with dilute acetic acid allows recovery of delicate specimens, with teeth of small vertebrates being the main identifiable component. Geologists and paleontologists should be alert to these rocks’ potential, because relatively small lenses, which can be found in gullies and stream banks even in heavily vegetated areas such as western Louisiana, may yield significant fossil faunas.
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