Results 61 to 70 of about 5,414 (202)
Petroleum Research, 2017 To further understand shale reservoir characteristics of Wufeng Formation and Longmaxi Formation in the Wuxi area, northeast Chongqing, based on drilling data of Well WX2, and taking the graptolite biostratigraphy as the standard marker of stratigraphic ...
Jin Wu +9 more
doaj +1 more source
Graptolite biostratigraphy of the lower Silurian of the Sommerodde-1 core, Bornholm, Denmark
, 2017 The Sommerodde-1 core provides a continuous record through the subsurface of southern Bornholm from the Wenlock Series (Silurian) through to the Lower Cambrian. The Silurian graptolite biostratigraphy of the core is described.
D. Loydell +3 more
semanticscholar +1 more source
High‐Resolution Tracking of Baltica's Northward Drift in the Ordovician
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract We investigated the paleogeography of Baltica via a paleomagnetic study of 471‐454 Ma limestones from the Siljan (Sweden) impact structure. Stepwise thermal demagnetization isolated a well‐defined magnetization component that unblocks up to the Curie temperature of magnetite and passes fold and reversal tests, indicative of a primary ...
Nastaran Ahanin, Stuart A. Gilder
wiley +1 more source
High resolution conodont-graptolite biostratigraphy in the Middle-Upper Ordovician of the Sierra de La Invernada Formation (Central Precordillera, Argentina) [PDF]
, 2008 Outcrops on the western slope of the La Invernada Range, San Juan Precordillera (W Argentina), were surveyed for lithofacial analysis and graptolite-conodont high resolution biostratigraphy.
Albanesi, Guillermo L. +5 more
core +1 more source
Clostridium difficile and gut health: Bacteria, the gut microbiome, and diet
iMetaOmics, Volume 2, Issue 1, March 2025.This review explores the mechanisms underlying Clostridium difficile infection (CDI), focusing on the pathogen's life cycle and its pathogenicity within the host. It further explores the interactions between the gut microbiome, gut metabolites, and CDI. Additionally, the review highlights dietary modulation as a promising strategy to restore gut health,
Hao Yang +8 more
wiley +1 more source
Graptolite biozone correlation charts
, 2011 Charts are presented showing the correlation of graptolite biozonations for the Lower Ordovician to Lower Devonian, i.e. for the entire stratigraphical range of the planktonic graptoloid graptolites.
D. K. LOYDELL
core +1 more source
The Depositional Record, Volume 11, Issue 1, Page 22-43, February 2025.Exceptional outcrop exposures of the Cloridorme Formation, Quebec, Canada, offer a rare opportunity to quantify the lateral continuity of event beds and elements of a basin‐plain depositional environment. Eighty‐two per cent of the mapped event beds are present across a 530 m outcrop transect parallel to depositional dip. However, even in this overall ‘
Zane Jobe +4 more
wiley +1 more source
, 1986 The biostratigraphic and depth-related ecostratigraphic significance of a newly discovered graptolite–phyllocarid faunule containing diminutive Rhabdinopora enigma and Anisograptus compactus of early to middle Tremadoc age from the Cooks Brook Formation
Jack W. Botsford, Bernd-D. Erdtmann
core +1 more source
Late Ordovician ironstone and its relation to ocean redox instability, climate and glaciation
Sedimentology, Volume 72, Issue 2, Page 631-665, February 2025.Abstract The Upper Ordovician (Katian) Neda Formation, a phosphatic ironstone, records a widespread but short‐lived shift to ferruginous waters across a vast epicontinental area. Lithofacies and stratigraphic reappraisal indicate that Neda ironstone deposition occurred on a storm‐dominated ramp when coastal upwelling emplaced eutrophic ferruginous ...
Edward J. Matheson +3 more
wiley +1 more source
Island Arc, Volume 34, Issue 1, January/December 2025.ABSTRACT An ostracod assemblage from the Late Ordovician (Katian) Phu Ngu Formation of northern Vietnam, South China paleoplate, yields typical Baltic and Laurentian‐affinity genera together with some endemic forms. Detailed paleontological and sedimentary analysis of the Phu Ngu Formation suggests it was deposited in a deeper marine forearc setting ...
Anna McGairy +9 more
wiley +1 more source