نتایج جستجو برای: ichnofacies
تعداد نتایج: 46 فیلتر نتایج به سال:
Triassic tetrapod tracks have long been studied, including classic ichnofaunas such as those of the lower Newark Supergroup of eastern North America and the Bundsandstein of central Europe. They are known from all seven continents and encompass five archetypal vertebrate ichnofacies for nonmarine environments (Chelichnus, Grallator, Batrachichnus, Brontopodus, Characichnos), all of which are pr...
Significant tetrapod footprint assemblages from the Late Triassic of western North America include the following ichnotaxa: Gwyneddichnium majore Bock, 1952, Rhynchosauroides ispp. Maidwell, 1911, Brachychirotherium parvum (Hitchcock, 1889) Brachychirotherium thuringiacum Rühle von Lilienstern, 1938, Apatopus lineatus Baird, 1957, Grallator cursorius Hitchcock, 1858, Anchisauripus sillimani Hit...
Two distinct traditions exist in the study of ancient ichnofaunas, which may be termed the ethological (invertebrate ichnology) and the biotaxonomic (tetrapod ichnology). Consequently, there are two different kinds of ichnofacies, each peculiar to one tradition, and we term them ethoichnofacies (invertebrate ichnofacies) and biotaxonichnofacies (tetrapod ichnofacies). In the Paleozoic, the Chel...
An invertebrate ichnoassemblage from the Moenkopi Group (Spathian Ankareh Formation) at Diamond Creek in north-central Utah consists of Gordia marina Emmons, Helminthopsis hieroglyphica Wetzel and Bromley and irregular networks similar to Unisulcus. This is the first record of Gordia and Helminthopsis from the Moenkopi Group. This low diversity ichnoassemblage, consisting of simple grazing trac...
A detailed outcrop and sub-surface analysis was completed on the Peay Member sandstone (Frontier Formation) in the northeast Bighorn Basin, Wyoming, building on previous work by Clark (2010) and Hutsky (2011). Regional correlations reveal the sandstone body to be digitate in planform geometry, elongate along depositional dip, and restricted across depositional strike. It is interpreted to be th...
Integration of ichnologic, sedimentologic, and stratigraphic studies of cores from Lower Pennsylva-nian oil and gas reservoirs (lower Morrow Sandstone, southwest Kansas) allows researchers to distinguish between estuarine-and open-marine deposits. This study represents one of the first published ichnologic analyses of a Paleozoic reservoir and, therefore, provides a unique opportunity to test t...
this study shows that ichonology can be used to refine sequence stratigraphy as well as to interpret the depositional environment of the kalat formation (upper maastrichtian) in the central kopeh- dagh basin (ne iran), dareh-gaz section. field studies and petrography of these deposits led to recognize four lithofacies and nine subfacies that formed in the tidal flat (lithofacies a), lagoon (lit...
Coprolites are the least studied and most under-sampled vertebrate trace fossils. They are very common in some Triassic localities. We recognize six new coprolite ichnotaxa: Alococopros triassicus, A. indicus, Saurocopros bucklandi, Liassococopros hawkinsi, Malericopros matleyi and Falcatocopros oxfordensis. The distribution of coprolite ichnotaxa is: Permian Hyronocopros amphipolar and Heterop...
this study shows that ichonology can be used to refine sequence stratigraphy as well as to interpret the depositional environment of the kalat formation (upper maastrichtian) in the central kopeh- dagh basin (ne iran), dareh-gaz section. field studies and petrography of these deposits led to recognize four lithofacies and nine subfacies that formed in the tidal flat (lithofacies a), lagoon (lit...
We provide the first reports of some rare trace fossils from middle Turonian (Upper Cretaceous) Sudety Mountains (SW Poland, Upper Nysa K?odzka Graben, D?ugopole Górne Quarry). These include burrows ? Ancorichnus isp., Asterosoma cf. ludwigae Schlirf, 2000, Phycodes Dactyloidites ottoi (Geinitz, 1849), Funalichnus strangulatus (Fritsch, 1883), palmatus Hall, 1852, , Phycosiphon incertum Fischer...
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