Paleogeography of the western Transverse Range province, California; new evidence from the late Oligocene and early Miocene Vaqueros Formation; Stratigraphy of the fine-grained facies of the Sisquoc Formation, Santa Maria Basin, California; paleoceanographic and tectonic implications; The Sisquoc Formation-Foxen Mudstone boundary in the Santa Maria Basin, California; sedimentary response to the new tectonic regime

Rigsby, Catherine A.; Ramírez, Pedro C.; Garrison, Robert E.; Behl, Richard J.; Ingle, James C.

doi:10.3133/b1995tuv

1998

DOI: 10.3133/b1995tuv

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Paleogeography of the western Transverse Range province, California; new evidence from the late Oligocene and early Miocene Vaqueros Formation; Stratigraphy of the fine-grained facies of the Sisquoc Formation, Santa Maria Basin, California; paleoceanographic and tectonic implications; The Sisquoc Formation-Foxen Mudstone boundary in the Santa Maria Basin, California; sedimentary response to the new tectonic regime

Catherine A. Rigsby¹,

Pedro C. Ramírez²,

Robert E. Garrison³

et al.

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Strontium isotope chronostratigraphic age of a sirenian fossil site on Santa Rosa Island, Channel Islands National Park, California

Paces¹,

Minor²,

Schmidt³

et al. 2023

Scientific Investigations Report

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Cover. Upper photo: Oblique photograph looking east towards the hillside site where sirenian (dugongid) fossils were discovered. Heavily incised terrane is typical of the geomorphological response of Vaqueros Sandstone and Rincon formation sedimentary strata to erosion. Height of the exposed hillslope is about 15 m. Middle left: Photograph showing the partial ribcage of the original dugongid fossil as found in 2012. The pick positioned above the exposed bones has a 0.4-m-long handle. Middle right: Well-preserved fossil Lyropecten sp. (scallop) shell used to date sedimentary strata associated with the dugong fossils by seawater-strontium chronostratigraphy. Lower left: Polished cross section of a fully articulated fossil Pyrodonte sp. (oyster) shell showing a complex variety of colors and textures. The specimen is encased and infilled with fine sand and silt matrix of the host rock. Shell is about 10 cm long and 4 cm wide at its thickest. Lower right: Fossil Balanus sp. (barnacle) specimen showing multiple calcite plates that form a nearly complete carapace. Specimen is about 3 cm in diameter at its base.

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Strontium isotope chronostratigraphic age of a sirenian fossil site on Santa Rosa Island, Channel Islands National Park, California

Paces¹,

Minor²,

Schmidt³

et al. 2023

Scientific Investigations Report

View full text Add to dashboard Cite

show abstract

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Cited by 1 publication

References 23 publications

Strontium isotope chronostratigraphic age of a sirenian fossil site on Santa Rosa Island, Channel Islands National Park, California

Strontium isotope chronostratigraphic age of a sirenian fossil site on Santa Rosa Island, Channel Islands National Park, California

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