نتایج جستجو برای: ichnofacies

تعداد نتایج: 46  

The trace fossil assemblages from the Unit 2 of Deh-Sufiyan Formation are described for the first time from The Central Alborz Range of northern Iran,  improving the record of the assemblages in the Cambrian of the Middle East. Twenty-one ichnogenera have been identified in the Deh-Sufiyan Formation, namely Arenicolites, Bergaueria, Chondrites, Circulichnus, Cruziana, Diplichnites, Didymaulichnu...

Journal: Geopersia 2012
Amir Karimian Torghabeh Asadollah Mahboubi Moyra E.J.Wilson Reza Moussavi-Harami

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...

Journal: :Geological Society of America Bulletin 2022

The upper Miocene Chagres Formation, cropping out along the Caribbean coast of Panama, has been previously interpreted as record last deep-water connection between and Pacific oceans based on bodyfossil paleodepth estimates. We test this interpretation by presenting an integrated ichnological sedimentological analysis eight coastal localities Formation (Toro Limestone Sandstone members). Toro M...

Journal: :Scientific Reports 2021

Abstract Oceanic gateways have modulated ocean circulation and influenced climatic variations throughout the Earth´s history. During late Miocene (7.8–7.35 Ma), Atlantic Ocean Mediterranean Sea were connected through Rifian Corridor (Morocco). This gateway is one of few examples deep ancient seaways with a semi-continuous sedimentary record. Deposits comprise turbidites intercalated between dee...

Journal: :Earth-Science Reviews 2022

The deep-marine environment is a complex setting in which numerous processes —settling of pelagic and hemipelagic particles the water column, sediment gravity flows (downslope density currents; turbid flows), bottom currents— determine deposition, hence variety facies including pelagites/hemipelagites, contourites, turbidites hyperpycnites. Characterization differentiation among deep-sea challe...

Journal: :Heritage 2022

Field investigations in the northwestern segment of Greater Caucasus, a Late Cenozoic orogen, have permitted establishment two new geosites, namely Ubin and Bezeps geosites. Both represent Berriasian–Middle Valanginian (Early Cretaceous) marine deposits with abundant trace fossils. The latter are attributed to Nereites ichnofacies indicate on deep palaeoenvironments (this interpretation challen...

Journal: :Palaeogeography, Palaeoclimatology, Palaeoecology 2021

Hyperpycnal flows have been widely described in different lacustrine and marine environments but sedimentary structures fossil content hyperpycnites often offer limited information about the palaeoenvironmental conditions. This limitation can be improved by ichnological analysis, which has recently used as a tool to differentiate between type of subaqueous deposits, even though still only few d...

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