Results 31 to 40 of about 190 (173)

Sequence analysis, cyclostratigraphy and palynofacies of early Anisian carbonate ramp deposits, NW Bulgaria [PDF]

Annales Societatis Geologorum Poloniae, 2020
A sequence- and cyclostratigraphic interpretation of early Anisian (Aegean) shallow-marine carbonate ramp deposits, exposed in outcrop sections west of Tserovo village, NW Bulgaria, is presented. The hierarchical pattern identified can be interpreted in terms of Milankovitch cyclicity with elementary sequences representing the precession (20-kyr) cycle,
Götz, Annette E., Ajdanlijsky, George, Strasser, André   +2 more
openaire   +1 more source

Palynostratigraphic and palynofacies analysis of x and y wells, offshore Niger Delta, Nigeria

Ife Journal of Science, 2021
A detailed palynostratigraphic and palynofacies study was carried out on two shallow offshore wells, codenamed Well X and Well Y, from the Niger Delta Basin, Nigeria. The study is aimed at establishing the age and palaeoenvironment of the sedimentary sequences penetrated by the wells.
Fadiya, S.L., Ogunleye, S.O., Oyelami , A.B., Aroyewun, F.R.   +3 more
openaire   +3 more sources

Coccolith moulds in sedimentary organic matter and their use in palynofacies analysis [PDF]

Journal of Micropalaeontology, 1985
Abstract. Imprints of coccoliths can be expected on palynomorphs and phytoclasts in Rhaetian and younger palynofacies. They resemble the hollows left by spheroidal pyrite but may commonly be distinguished on the basis of shape and by occasional marks which reflect the arrangement of the calcite laths of which they were composed. Monospecific blooms are
openaire   +2 more sources

Stratigraphic

Egyptian Journal of Petroleum, 2013
The stratigraphic distribution of the palynomorphs and particulate organic matter was studied in the subsurface Lower/Middle Cretaceous sections in Ii-26-1 and Ig-30-1 wells, located in north Western Desert of Egypt.
Sameh S. Tahoun, Walid A. Makled, Tarek F. Mostafa   +2 more
doaj   +1 more source

Source rock evaluation of Kharita and Bahariya formations in some wells, North Western Desert, Egypt: Visual palynofacies and organic geochemical approaches

Egyptian Journal of Petroleum, 2018
Palynofacies analyses were applied on ninety-one samples from the subsurface Albian – Cenomanian succession represented by Kharita and Bahariya formations, encountered in El-Noor, and South Sallum wells, located in the North Western Desert, Egypt, to ...
Nabil Aboul Ela, Sameh S. Tahoun, Tarek Fouad, Doaa A. Mousa, Rehab Saleh   +4 more
doaj   +1 more source

Changes in Cave Sedimentation Mechanisms During the Late Quaternary: An Example From the Lower Cerovačka Cave, Croatia

Frontiers in Earth Science, 2021
During archeological excavations in the Lower Cerovačka Cave (Mt. Velebit, Croatia), the test trench penetrated to a depth of 1.8 m. An undisturbed sequence of sediments was exposed. Considering that caves represent highly efficient sediment traps it was
Tomislav Kurečić, Neven Bočić, Lara Wacha, Koraljka Bakrač, Anita Grizelj, Dinko Tresić Pavičić, Christopher Lüthgens, Andreja Sironić, Siniša Radović, Loris Redovniković, Markus Fiebig   +10 more
doaj   +1 more source

The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity

Journal of Geophysical Research: Solid Earth, Volume 125, Issue 12, December 2020., 2020
Abstract Quantification of risk to seal integrity in CCS, or gas extraction from hydraulic fracturing, is directly affected by the accessibility of organic pores within organic rich mudrocks. Knowledge of the host organic matter's mechanical properties, which are influenced by depositional environment and thermal maturity, are required to reduce ...
T. D. Fender, C. Van Der Land, M. Rouainia, S. P. Graham, D. M. Jones, C. H. Vane, T. Wagner   +6 more
wiley   +1 more source

Palynofacies analysis – principles and application for paleoenvironmental studies: implications from Bulgaria

Review of the Bulgarian Geological Society, 2021
The use of palynofacies analysis has been steadily increasing during the last decades. This stems from both commercial interests (i.e., hydrocarbon exploration) and academic research of past environments and studies of the global climate changes that took place during the Phanerozoic.
openaire   +1 more source

Turbidite‐induced re‐oxygenation episodes of the sediment‐water interface in a diverticulum of the Tethys Ocean during the Oceanic Anoxic Event 1a: The French Vocontian Basin

The Depositional Record, Volume 6, Issue 2, Page 352-382, June 2020., 2020
The oceanic anoxic event OAE1a episode has been recorded in the Vocontian Basin (SE‐France) but recurrent reworking (turbidites) altered the record. Abstract Widespread anoxic events affected the Tethys Ocean during the Mesozoic. The Ocean Anoxic Event 1a (Early Aptian), expressed as the Selli Level or Goguel Level (GL) in European basins.
Alexis Caillaud, Melesio Quijada, Bastien Huet, Jean‐Yves Reynaud, Armelle Riboulleau, Viviane Bout‐Roumazeilles, François Baudin, Anthony Chappaz, Thierry Adatte, Jean‐Noël Ferry, Nicolas Tribovillard   +10 more
wiley   +1 more source

Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria

Geology, Geophysics & Environment, 2019
Palynofacies analyses of the strata penetrated by Ida-4 wells were carried out with the aim of studying the stratigraphic sequence penetrated by the well in order to establish palynostratigraphic zones, relative age and the paleoenvironment of deposition. Fifty ditch cutting samples within the interval of 2179–3523 m were analyzed.
Jacinta Nkiru Chukwuma-Orji, Edward Agboneni Okosun, Funmilayo Daramola Gana   +2 more
openaire   +2 more sources