Results 81 to 90 of about 12,527 (229)

A tale of two microbialites: Stromatolites and microbially induced sedimentary structures

Sedimentology, Volume 73, Issue 4, Page 849-863, June 2026.
ABSTRACT Microbialites are biosedimentary structures built by microbial mats. Five microbialite groups are distinguished: stromatolites, thrombolites, dendrolites, leiloites and microbially induced sedimentary structures (MISS). This contribution discusses the two most abundant microbialite groups in marine settings, stromatolites and MISS.
Nora Noffke, Stanley M. Awramik
wiley   +1 more source

(Table 7) Pliocene and Pleistocene diatom biostratigraphy of ODP Site 177-1094 from the southern South Atlantic

, 2002
(Table 7) Pliocene and Pleistocene diatom biostratigraphy of ODP Site 177-1094 from the southern South ...
Ulrich Zielinski (6981695), Rainer Gersonde (6961220), Zielinski, Ulrich, Gersonde, Rainer   +3 more
core   +1 more source

Conodont biostratigraphy in the Middle–Upper Ordovician boundary beds of Estonia [PDF]

Estonian Journal of Earth Sciences, 2008
Conodonts of the uppermost Uhaku, the Kukruse, and the lower Haljala stages (uppermost Darriwilian and lower Sandbian) of Estonia are discussed. The distribution of conodonts within the Pygodus serra, P.
Viira, Viive
doaj  

Barium Isotopes Indicate Spatiotemporal Heterogeneity of Marine Primary Productivity During the Toarcian Oceanic Anoxic Event

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Toarcian Oceanic Anoxic Event (T‐OAE, ∼183 Ma) was characterized by globally enhanced organic‐carbon burial and a negative carbon‐isotope excursion (N‐CIE). However, the role of marine productivity at this time, and its spatiotemporal variability, is unclear.
Wenhan Chen, David B. Kemp, Hugh C. Jenkyns, Stuart A. Robinson, Yibo Lin, Jun Hu, Zhong Han, Tianchen He, Feifei Zhang, Xilei Sun, Guangyu Shi, Chao Li   +11 more
wiley   +1 more source

New Smithian (Early Triassic) ammonoids from Crittenden Springs, Elko County, Nevada: Implications for taxonomy, biostratigraphy and biogeography

, 2010
Smithian; Triassic; ammonoids; Crittenden Springs; Elko County; taxonomy; biostratigraphy ...
James F. Jenks, Arnaud Brayard, Thomas Bruehwiler and Hugo Bucher
core  

Site 1221

, 2002
Site 1221 (12°01.999´N, 143°41.572´W; 5175 meters below sea level (mbsl); Fig. F1) forms an equatorial component of the 56-Ma transect drilled during Leg 199 and is situated about three-quarters of the way between the Clipperton and Clarion Fracture ...
Lyle, M., Vanden Berg, M.D., Quintin, L., Wilson, P.A., Backman, J., Pälike, H., Coxall, H.K., Janecek, T.R., Raffi, I., Moore, T.C., Nomura, R., Nigrini, C.A., Faul, K., Tripati, A.K., Parés, J.M., Rea, B.R., Kruse, S., Wade, B.S., Nishi, H., Lanci, L., Hovan, S.A., Lear, C.H., Gaillot, P.A., Knoop, P., Busch, W.H., Norris, R.D., Rea, D.K., Steiger, T.H.   +27 more
core   +1 more source

The Botrychiopsis genus and its biostratigraphic implications in Southern Paraná Basin

Anais da Academia Brasileira de Ciências, 2003
Botrychiopsis has been considered an important floristic element of Westphalian/Artinskian associations of the Paraná Basin. The occurrence of Botrychiopsis in roof-shales of the Rio Bonito Formation in Southern Paraná Basin (Quitéria area), supported by
André Jasper, Margot Guerra-Sommer, Miriam Cazzulo-Klepzig, Rualdo Menegat   +3 more
doaj   +1 more source

Distal Marine Mercury Signals in Peak Late Paleozoic Ice Age: Implications for Aeolian Versus Volcanic Inputs

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract An investigation of the relationships among large igneous province (LIP), carbon cycling, and climate change is central to understanding Earth system. During Glacial III, the most intense phase of Late Paleozoic Ice Age, the influence of coeval LIP on the carbon cycle and climate remains debated.
Yuzhu Ge, J. E. Sonke, L. Laffont, T. R. Them II, A. Bekker, Huaguo Wen   +5 more
wiley   +1 more source

Biostratigraphy of the Danian/Selandian transition: A case study from Kamestan anticline section, northwest of Izeh city in Khuzestan province, Southern Iran

, 2010
The planktonic foraminifera turnover across the Danian-Selandian boundary (early to late Paleocene, ~60 Ma) has been studied in the Kamestan anticline section. The studied interval span planktonic foraminifera zones P2-P3.
Nasrin Hadavandkhani, Abbas Sadeghi
core  

(Table 5) Pliocene and Pleistocene diatom biostratigraphy of ODP Site 177-1092 from the northern Meteor Rise, South Atlantic

, 2002
(Table 5) Pliocene and Pleistocene diatom biostratigraphy of ODP Site 177-1092 from the northern Meteor Rise, South ...
Ulrich Zielinski (6981695), Rainer Gersonde (6961220), Zielinski, Ulrich, Gersonde, Rainer   +3 more
core   +1 more source