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Showing 1 to 1 of 1 for “"nautiloids"”.
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Stratigraphy, Petrology, Diagenesis, Paleontology, and Depositional Environments of the Harrisburg Member of the Kaibab Formation in Northern Arizona and Southern Utah
… present in units five and seven include: nautiloids, gastropods, sponges, bivalves, lophophorates, and trilobites. Fossils are preserved by rust-red silica. The interior of the fossils are composed of drusy silica or dolomudstone.</p> <p>Fourth order sequences are present. Sequence one …