Five subsurface sections and a large number of thin the Hartha Formation (age Late Campanian – Early Maastrichtian) were studied to unravel depositional facies environments. The is important as an oil reservoir in Iraq. Petrographic microfacies analysis selected wells from Balad East Baghdad fields Central Iraq, enable recognition three main Sedimentary paleoenvironments. These are restricted m...

Crinoid columnals are major faunal components of interbedded shales and carbonates of the Upper Ordovician Kope to Fairview formations (Edenian-Maysvillian) of the Cincinnati Arch region. Six species can be identified on the basis of distinctive morphological characters of the columnals. Crinoid distribution was plotted from point-counted carbonate samples taken through a 68m thick composite se...

Abstract The Curiosity rover is exploring Hesperian-aged stratigraphy in Gale crater, Mars, where a transition from clay-bearing units to layered sulfate-bearing unit has been interpreted represent major environmental of unknown character. We present the first description key facies unit, recently observed distance by rover, and propose model for changes depositional environments. Our results i...

The lacustrine system developed in the basin of Mexico has been great interest studies various geological and social disciplines. Its sediments preserve history environmental changes that occurred during late Quaternary. Between 2016 2018, a set sediment cores were collected Xochimilco sub-basin, located south Mexico. From these sedimentary sequences, master sequence was constructed represents ...

Analyses of a fluvial sedimentary sequence from the lower reaches Narmada River establish record rhythmic cycles sediment facies that represent floods during late Holocene. The south-west Indian monsoon strongly influences study area, and heavy rainfall or cyclones which originate either Bay Bengal Arabian Sea, also affect region. Optically stimulated luminescence dating places 8 m thick in cli...

Gravity-flow deposits form the northern part of Crocker Formation (Oligocene–Early Miocene), with most significant interpretation as a sand-rich system in proximal and mud-rich distal area deep-water turbidite depositional setting. Seven outcrop localities northern-part were selected for mapping sampling, starting from Kota Kinabalu up to Telipok evaluate sedimentary sequence. This study used m...

The study area falls within the Lokoja Formation of Southern Bida Basin. objective this was to evaluate field characteristics and sedimentological parameters depositional environment Nataco-Banda Sediments Formation, Basin, Nigeria using appropriate techniques such as granulometric pebble morphometric analysis. Field studies revealed a repeated alternating sequence conglomeratic pebbly coarse-g...

In this research, the microbiostratigraphy and depositional environmental implications related to the Surgah Formation at the northern flank of the Kuh-e Sepid anticline in the Lorestan Basin are discussed. A study of small planktonic foraminifera from the 101-m-thick Surgah Formation led to the identification of three Turonian–Santonian biozones: (1) Helvetoglobotruncana helvitica, (2) Margino...

The Pyrenean orogen extended eastward, across the present-day Gulf of Lion margin. late or post-orogenic dismantling this segment, contemporaneous with ongoing shortening in Spanish Pyrénées, is still debated. Understanding transition between two geodynamic events requires to document precise timing succession tectonic processes involved. We investigate superposition rifting structures over thr...