Lawrence H. Tanner

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a Dipartimento di Scienze della Terra, Università di Perugia, Italy b Dipartimento di Geoscienze, Università di Padova, Italy c Centro Nazionale delle Ricerche, Istituto di Geoscienze e Georisorse, Padova, Italy d Department of Biological Sciences, Le Moyne College, Syracuse, NY 13214, USA e Ecole Normale Supérieure de Lyon, France f Université Lyon1,(More)
Nonmarine fluvial, eolian and lacustrine strata of the Chinle and Glen Canyon groups on the southern Colorado Plateau preserve tetrapod body fossils and footprints that are one of the world's most extensive tetrapod fossil records across the Triassic– Jurassic boundary. We organize these tetrapod fossils into five, time-successive biostratigraphic(More)
The Upper Triassic (Norian) Owl Rock Formation was deposited in a low-gradient floodbasin at a subtropical paleolatitude. The lower part of the formation consists predominantly of fine-grained siliciclastic lithofacies deposited by sheetflood and sinuous streams on a muddy floodplain during a period of continuous basin aggradation. Nodular calcretes are(More)
The Moenave Formation was deposited during latest Triassic to earliest Jurassic time in a mosaic of fluvial, lacustrine, and eolian subenvironments. Ephemeral streams that flowed north-northwest (relative to modern geographic position) deposited singleand multi-storeyed trough cross-bedded sands on an open floodplain. Sheet flow deposited mainly silt across(More)
For the last three decades, the position of the Triassic–Jurassic boundary (TJB) in nonmarine strata has largely been based on its palynostratigraphic placement just below the oldest basalts of the Central Atlantic magmatic province (CAMP) in the Newark Supergroup of eastern North America. This boundary, however, is demonstrably older than the TJB as it is(More)
a Dipartimento di Geoscienze, Università di Padova, via Matteotti 30, 35100 Padova, Italy b Western Australian Argon Isotope Facility, Department of Applied Geology & JdL-CMS, Curtin University of Technology, Perth, WA6845, Australia c Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA d Department of Biological(More)
We present new analyses that confirm Ir enrichment (up to 0.31 ng/g) in close proximity to the palynological Triassic–Jurassic boundary in strata near the top of the Blomidon Formation at Partridge Island, Nova Scotia. High Ir concentrations have been found in at least two samples within the uppermost 70 cm of the formation. Ratios of other PGEs and Au to(More)
a New Mexico Museum of Natural History, 1801 Mountain Road N. W., Albuquerque, NM 87104, USA b Department of Biological Sciences, Le Moyne College, 1418 Salt Springs Road, Syracuse, NY 13214, USA c Department of Earth and Planetary Sciences, MSC 03 2040, 1 University of New Mexico, Albuquerque, NM 87131, USA d Rézsü u. 83, H-1029 Budapest, Hungary e(More)