Results 21 to 30 of about 45,325 (282)

Fossilized bioelectric wire – the trace fossil Trichichnus [PDF]

Biogeosciences, 2014
Abstract. The trace fossil Trichichnus is proposed as an indicator of fossil bioelectric bacterial activity at the oxic–anoxic interface zone of marine sediments. This fulfils the idea that such processes, commonly found in the modern realm, should be also present in the geological past.
Kȩdzierski, M., Uchman, A., Sawlowicz, Z., Briguglio, A.   +3 more
openaire   +6 more sources

Engineering the Cambrian explosion: the earliest bioturbators as ecosystem engineers [PDF]

, 2017
By applying modern biological criteria to trace fossil types and assessing burrow morphology, complexity, depth, potential burrow function and the likelihood of bioirrigation, we assign ecosystem engineering impact (EEI) values to the key ichnotaxa in ...
Callow, Richard H. T., Callow, Richard H.T., Herringshaw, Liam G., McIlroy, Duncan   +3 more
core   +1 more source

Dinosaur footprints and other Ichnofauna from the Cretaceous Kem Kem Beds of Morocco [PDF]

, 2014
We describe an extensive ichnofossil assemblage from the likely Cenomanian-age 'lower' and 'upper' units of the 'Kem Kem beds' in southeastern Morocco.
Baidder, Lahssen, Dutheil, Didier B., Ibrahim, Nizar, Martill, David M., Sereno, Paul C., Varricchio, David J., Wilson, Jeff A., Zouhri, Samir   +7 more
core   +4 more sources

Sedimentology, diagenesis and ichnology of Cretaceous and Palaeogene calcretes and palustrine carbonates from Uruguay [PDF]

, 2011
The Cretaceous (Mercedes Formation) and Paleogene (Queguay Formation) deposits cropping out inWand S Uruguay comprise two terrestrial limestone units that are very rich in trace fossils.
Alonso-Zarza, Ana María, Genise, Jorge F., Verde Cataldo, Mariano   +2 more
core   +3 more sources

Trace fossils of an amalgamated storm-bed succession from the Jurassic of the Kachchh Basin, India: The significance of time-averaging in ichnology

Journal of Palaeogeography, 2018
The uppermost part of the Upper Bathonian Sponge Limestone member, Patcham Formation, of the Jhura Dome of Kachchh Mainland is a thickening- and shallowing-upward succession topped by medium- to thick-bedded hummocky cross-stratified grainstones ...
Franz T. Fürsich, Alfred Uchman, Matthias Alberti, Dhirendra K. Pandey   +3 more
doaj   +1 more source

Trace Fossils in Permian Rocks of English Riviera UNESCO Global Geopark [PDF]

Geoconservation Research, 2021
The Permian breccias, conglomerates and sandstones of the English Riviera UNESCO Global geopark were deposited in quite harsh, desert environments just north of the Permian Equator.
Malcolm Hart, Christopher Smart
doaj   +1 more source

Trace Fossils, Process, and Documents

Proceedings from the Document Academy, 2019
This paper examines fossils as documents. Fossils are informative in the documentary world because they represent the skeletal structures of once-living organisms—therefore, they are the documentary remnants of something that, previously, was a fully ...
Robert Montoya
doaj   +1 more source

New hominin remains and revised context from the earliest Homo erectus locality in East Turkana, Kenya

Nature Communications, 2021
KNM-ER 2598 is one of the oldest known Homo erectus fossils but there are doubts about its age. Here, Hammond et al. trace the original location of the specimen, confirming an age >1.85 million years, and locating additional hominin fossils situated in a
Ashley S. Hammond, Silindokuhle S. Mavuso, Maryse Biernat, David R. Braun, Zubair Jinnah, Sharon Kuo, Sahleselasie Melaku, Sylvia N. Wemanya, Emmanuel K. Ndiema, David B. Patterson, Kevin T. Uno, Dan V. Palcu   +11 more
doaj   +1 more source

Estratigrafía de Sr y evolución sedimentaria de los depósitos marinos del Mioceno temprano en el antepaís del norte de la Cuenca Austral (o Magallanes), Argentina [PDF]

, 2015
Early Miocene shallow marine deposits in the region of Lago Posadas-Meseta Belgrano (Argentina) represent part of the “Patagoniense” transgression, an Atlantic marine incursion that flooded large part of Patagonia, including the Austral (foreland) Basin (
Alonso Muruaga, Pablo Joaquin, Cuitiño, José Ignacio, Scasso, Roberto Adrian, Ventura Santos, Roberto   +3 more
core   +1 more source

Where are the Fossils of the First Galaxies? I. Local Volume Maps and Properties of the Undetected Dwarfs [PDF]

, 2010
We present a new method for generating initial conditions for LCDM N-body simulations which provides the dynamical range necessary to follow the evolution and distribution of the fossils of the first galaxies on Local Volume, 5-10 Mpc, scales.
Babul, Begum, Belokurov, Belokurov, Bovill, Bullock, Cole, de Jong, Diemand, Efstathiou, Eisenstein, Frebel, Frebel, Geha, Giovanelli, Gnedin, Gnedin, Irwin, Kallivayalil, Kirby, Kirby, Klypin, Knollmann, Koposov, Kormendy, Kravtsov, Majewski, Martinez, Massimo Ricotti, Mia S. Bovill, Navarro, Norris, Peñarrubia, Peñarrubia, Quinn, Ricotti, Ricotti, Ricotti, Ricotti, Ricotti, Saigo, Shetrone, Shull, Simon, Simon, Susa, Tollerud, Tolstoy, Tormen, van der Marel, Venkatesan, Walker, Walsh, Walsh, Willman, Willman, Willman, Wise, Wolf, Zucker, Zucker   +60 more
core   +1 more source