Results 21 to 30 of about 443 (143)

New Hirnantian orthide brachiopods from the type section of the Porkuni Stage (Porkuni quarry, northeastern Estonia) [PDF]

Estonian Journal of Earth Sciences, 2012
Four new Hirnantian species of orthide brachiopods, Sigmelasma peepi, Mendacella aerinensis, Drabovia? minuta and Tyronella siugensis are described from the type section of the Porkuni Regional Stage in the Porkuni quarry, northeastern Estonia.
Linda Hints
doaj   +1 more source

New evidence of an early Pridoli barrier reef in the southern part of the Baltic Silurian basin based on three-dimensional seismic survey, Lithuania [PDF]

Estonian Journal of Earth Sciences, 2015
Reefs and a barrier reef have been newly identified and mapped by three-dimensional (3D) seismic survey in Lithuania. Seismic data analysis has allowed the size and geometry of these reefs to be determined.
Donatas Kaminskas, Dainius Michelevičius, Nerijus Blažauskas   +2 more
doaj   +1 more source

Bioclastic bottom‐current deposits of a Devonian contourite terrace: Facies variability and depositional architecture (Tafilalt Platform, Morocco)

Sedimentology, Volume 70, Issue 5, Page 1413-1471, August 2023., 2023
ABSTRACT The study examines bioclastic carbonate contourites that arise from the broad spectrum of bottom‐current related sedimentary processes ranging from deposition to erosion. The result of the intermittent accumulation of sediment are thin and condensed successions with abundant hiatuses.
Heiko Hüneke, M. Arwed Gibb, Oliver Mayer, Jorit F. Kniest, Paul Mehlhorn, Laura M. Gibb, Z. Sarah Aboussalam, R. Thomas Becker, Ahmed El Hassani, Lahssen Baidder   +9 more
wiley   +1 more source

Allogenic succession in Late Ordovician reefs from southeast China: a response to the Cathaysian orogeny [PDF]

Estonian Journal of Earth Sciences, 2015
Several Late Ordovician (late Katian) reef complexes are known from the border area of Jiangxi and Zhejiang provinces in southeast China. We studied two coral–stromatoporoid reefs exposed in the Xiazhen Formation at Zhuzhai (Yushan, Jiangxi).
Qijian Li, Yue Li, Wolfgang Kiessling
doaj   +1 more source

Enhanced Continental Weathering as a Trigger for the End‐Devonian Hangenberg Crisis

Geophysical Research Letters, Volume 50, Issue 11, 16 June 2023., 2023
Abstract The Hangenberg Crisis coincided with a large decline of biodiversity and widespread anoxia in the end‐Devonian ocean. Previous research attributed marine anoxia to the spread of deeply‐rooted plants and/or increased volcanism on the continents, but crucial links have not been thoroughly explored. Herein, we propose enhanced weathering as a key
Wenkun Qie, Junpeng Zhang, Genming Luo, Thomas J. Algeo, Bo Chen, Lei Xiang, Kun Liang, Xianyi Liu, Philip A. E. Pogge von Strandmann, Jitao Chen, Xiangdong Wang   +10 more
wiley   +1 more source

Inside a sediment‐stressed Middle Devonian carpet reef: Cave exposes details of three‐dimensional facies architecture and palaeoecology

Sedimentology, Volume 70, Issue 4, Page 1251-1280, June 2023., 2023
ABSTRACT During the Middle Devonian, reef growth reached an acme, and corals and stromatoporoids colonized depositional niches commonly considered unfavourable for reefal organisms. This paper documents the detailed facies architecture and palaeoecology of a stratigraphically thin (ca 12 m, ‘carpet reef’), lower Givetian reefal body exposed along the ...
Tanja Unger, Matthieu Saillol, Markus Aretz, Stephen Lokier, Mathias Mueller, Volker Karius, Adrian Immenhauser   +6 more
wiley   +1 more source

Indigenous demosponge spicules in a Late Devonian stromatoporoid basal skeleton from the Frasnian of Belgium [PDF]

, 2014
peer ...
Kershaw, S, Reitner, J., Reynolds, A., Hubert, M, Reynolds, Alan, Mistiaen, Bruno, Boulvain, F., Benoit L. M. Hubert, Boulvain, F, Stephen Kershaw, Hubert, B.L.M., Reynolds, A, Alan Reynolds, Da Silva, A-C, Mistiaen, B, Boulvain, Frédéric, Bruno Mistiaen, Hubert, Benoit L. M., Frédéric Boulvain, Kershaw, Stephen, Anne-Christine Da Silva, Da Silva, A.-C., Reitner, J, Joachim Reitner, Da Silva, Anne-Christine, Hubert, BLM, Reitner, Joachim   +26 more
core   +1 more source

Bryozoan‐rich stromatolites (bryostromatolites) from the Silurian of Gotland and their relation to climate‐related perturbations of the global carbon cycle

Sedimentology, Volume 69, Issue 1, Page 162-198, January 2022., 2022
ABSTRACT Bryozoan–stromatolite associations (bryostromatolites) formed conspicuous reef structures throughout the Sheinwoodian (Wenlock) to Ludfordian (Ludlow) stratigraphy on Gotland but have not been described so far. They are mainly composed of encrusting bryozoans forming a complex intergrowth with porostromate and spongiostromate microbes and are ...
Anna Lene Claussen, Axel Munnecke, Andrej Ernst, Marco Brandano   +3 more
wiley   +1 more source

Understanding Palaeozoic stromatoporoid growth [PDF]

, 2018
Stromatoporoids were abundant components of reefs, reef complexes and associated facies for ca. 100 million years between Middle Ordovician and end-Devonian time.
Kershaw, S, Axel Munnecke, Emilia Jarochowska, Munnecke, A, Jarochowska, E, Stephen Kershaw   +5 more
core   +1 more source

Detecting initial aragonite and calcite variations in limestone–marl alternations

Sedimentology, Volume 68, Issue 7, Page 3102-3115, December 2021., 2021
Abstract Limestone–marl alternations are commonly used for high‐resolution cyclostratigraphic studies and palaeoenvironmental reconstructions, but diagenetic studies indicate that not all limestone–marl alternations reflect genuine differences in the initial sediment composition driven by environmental changes.
Theresa Nohl, Manuel J. Steinbauer, Matthias Sinnesael, Emilia Jarochowska, Cathy Hollis   +4 more
wiley   +1 more source