Results 81 to 90 of about 11,694 (205)

Assessing Thermal Maturity of the Pendência Formation (Potiguar Basin) Using Vitrinite Reflectance and Raman Spectroscopy

open access: yesJournal of Raman Spectroscopy, Volume 56, Issue 11, Page 1203-1214, November 2025.
Palynofacies assemblages from the onshore Potiguar Basin display a wide thermal maturity range, with vitrinite reflectance (%Ro) values of 0.46–2.72 measured from nine samples at depths of 1059–4443 m. A strong correlation exists between %Ro and Raman parameters, specifically the G‐band's full width at half maximum.
Gabriel A. Barberes   +14 more
wiley   +1 more source

Nature and timing of Late Mississippian to Mid-Pennsylvanian glacio-eustatic sea-level changes of the Pennine Basin, UK [PDF]

open access: yes, 2012
The Pennine Basin of northern England contains a comparatively complete Serpukhovian– Moscovian succession characterized by high-resolution ammonoid zonation and cyclic paralic sedimentation.
Condon, Daniel J., Waters, Colin N.
core   +2 more sources

Paleoceanography of the eastern equatorial Pacific during the Neogene: Synthesis of Leg 138 drilling results [PDF]

open access: yes, 1995
The primary objective of Leg 138 was to provide detailed information about the ocean\u27s response to global climate change during the Neogene. Two north-south transects were drilled (95° and 110°W) within the region of equatorial divergence-driven ...
Mayer, Larry A.   +2 more
core   +2 more sources

Stage boundaries, global stratigraphy, and the time scale: towards a simplification

open access: yesCarnets de Géologie, 2004
This paper examines four facets of stratigraphic terminology and usage considered faulty and proposes corrective measures. The four perfectible areas are: (1) The system of dual nomenclature requiring discrete terminologies for the superpositional and ...
Thierry Jacques   +3 more
doaj  

Synchroneity of major late Neogene sea level fluctuations and paleoceanographically controlled changes as recorded by two carbonate platforms [PDF]

open access: yes, 2000
Shallow-water carbonate systems are reliable recorders of sea level fluctuations and changes in ambient seawater conditions. Drilling results from Ocean Drilling Program (ODP) Legs 133 and 166 indicate that the timing of late Neogene sedimentary breaks ...
Anselmetti   +46 more
core   +3 more sources

Facies analysis, stratigraphy and marine vertebrate assemblage of the lower Miocene Chilcatay Formation at Ullujaya (Pisco basin, Peru)

open access: yesJournal of Maps, 2018
This paper is the first integrated account of the sedimentology, stratigraphy, and vertebrate paleontology for the marine strata of the Chilcatay Formation exposed at Ullujaya, Pisco basin (southern Peru).
C. Di Celma   +13 more
doaj   +1 more source

Editorial: Multi-Disciplinary Applications in Magnetic Chronostratigraphy

open access: yesFrontiers in Earth Science, 2021
Luigi Jovane   +2 more
doaj   +1 more source

Miocene deep-water agglutinated Foraminifera from ODP Hole 909c: Implications for the paleoceanography of the Fram Strait Area, Greenland Sea [PDF]

open access: yes, 2005
Deep-water agglutinated Foraminifera (DWAF) are investigated from Miocene sediments recovered from ODP Hole 909C in the Fram Strait, Norwegian-Green land Sea. We studied 125 samples from Cores 909C-50R to -103R. and recovered over 60 species of DWAF. The
Kaminski, MA, Kender, S, Silye, L
core   +1 more source

Quaternary Lives

open access: yesGeologija, 2007
After a short-lived »ban«, the Quaternary has again been formalized as a chronostratigraphic unit, consisting of the Pleistocene and the Holocene.
Miloš Bavec
doaj  

Bio- and chronostratigraphy of the Middle Triassic Reifling Formation of the westernmost Northern Calcareous Alps [PDF]

open access: yes, 2018
New finds of fossils including bivalves, ammonoids, brachiopods and palynomorphs from the Middle Triassic Reifling Formation significantly improve the age assignment for this unit in Liechtenstein and Vorarlberg.
Brack, Peter   +4 more
core  

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