Nov 1, 2022 · Iron ooids were transported in places of nummulite accumulation. The middle Eocene ironstone of the Transylvanian Basin, Romania, provides new insight into the genesis …

Here, we report an exceptional, unique finding of a still active deposit of submillimetric iron ooids, under formation at the seabed at a depth of 80 m over an area characterized by intense …

Jun 20, 2017 · Iron ooids are small, commonly well sorted, medium sand sized, less than 1mm in diameter, oblate spheroidal sedimentary grains. Iron ooids are found mostly unbroken with …

Jul 1, 2024 · Ooids and pisoids are spherical minerals with a concentric structure that have attracted the attention of the scientific community because of their unique nature. The …

Jan 8, 2025 · This research describes these Jurassic iron ooid units within the Tethyan Himalayas and contributes to an understanding of their palaeoenvironments, mode of formation and …

May 24, 2023 · We studied three Swiss shallow-marine iron oolites from Herznach, Windgällen and Erzegg, all from condensed sedimentary sequences of Middle to early Late Jurassic age, …

Jun 14, 2024 · The stromatolite-like cauliflower structures associated with chamositic ooids suggest microbial activity that promoted iron concentration, similar to the origin of …

We have examined typical Minette-type ooidal ironstones of Cambrian, Early Ordovician, and Cretaceous age from numerous localities in Canada and the United States. Occurrences of …

A new and simple descriptive system which documents ooid mineralogy and fine structure has been used to distinguish ooids of different origins and a classification of iron-rich ooids into …

May 8, 2019 · Here, we report an exceptional, unique finding of a still active deposit of submillimetric iron ooids, under formation at the seabed at a depth of 80 m over an area …