Results 11 to 20 of about 25,970 (222)

Marine Anoxia and Ocean Acidification During the End‐Permian Extinction

open access: yesGeophysical Monograph Series, Page 325-340., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Ying Cui   +4 more
wiley  

+3 more sources

UPPER TRIASSIC CALCAREOUS ALGAE FROM THE PANTHALASSA OCEAN

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
Upper Triassic calcareous algae, abundant and well-diversified in Tethyan deposits, have rarely been described in rocks of Panthalassan origin. Over the past ten years, several studies were performed on Upper Triassic carbonate deposits of Panthalassan ...
IOAN I. BUCUR   +9 more
doaj   +1 more source

Microfossils (Foraminifera and Calcareous Algae) of the Yamama Formation, Southern Iraq

open access: yesIraqi Geological Journal, 2022
The Yamama Formation is one of the important reservoirs, in southern Iraq. This formation in all studied wells consists of limestone and dolomitic limestone. Microfacies analysis clarified that the formation represented a ramp, inner, middle and
Shatha Mohsin   +2 more
doaj   +1 more source

Tropical seagrass-associated macroalgae distributions and trends relative to water quality [PDF]

open access: yes, 2007
Tropical coastal marine ecosystems including mangroves, seagrass beds and coral reef communities are undergoing intense degradation in response to natural and human disturbances, therefore, understanding the causes and mechanisms present challenges for ...
Boyer, Joseph N.   +3 more
core   +1 more source

A New Preparation Method of Microfauna from Gypsum: Micropaleontological Association from the Middle Miocene Badenian Gypsum Deposits of Paratethys

open access: yesGeosciences, 2020
Evaporitic gypsum deposits represent an important paleoenvironmental record of the Miocene Badenian of the Carpathian Mountains belt. In this study, we developed a nontoxic method to concentrate calcareous microfossils from gypsum (CaSO4·2H2O), by ...
Hans-Peter Bojar   +3 more
doaj   +1 more source

Use of calcareous algae and monensin in Nellore cattle subjected to an abrupt change in diet

open access: yesCiência Rural, 2016
: Additives are used in high concentrate diets to prevent metabolic disorders in cattle. This study was designed to evaluate the effect of calcium sources and monensin on the control of ruminal acidosis in Nellore cattle that were abruptly shifted to a ...
Roberta Ferreira Carvalho   +6 more
doaj   +1 more source

Calcareous algae and cyanobacteria

open access: yesGeology Today, 2020
Algae is an informal term used to describe a broad group of simple organisms from the plant kingdom. The organisms included within this grouping are aquatic photosynthetic biota with an extensive range of life habits and forms. These organisms range from micron‐sized unicellular forms to giant seaweeds and kelps, which can grow to several metres long ...
Leaf, MC   +4 more
openaire   +2 more sources

New findings of halimedacean algae from the Late Triassic Dachstein Limestone of the Northern Calcareous Alps (Hochschwab Area, Styria, Austria)

open access: yesGeologia Croatica, 2008
Two taxa of halimedacean algae are recorded from the Upper Triassic lagoonal Dachstein Limestone (Norian-Rhaetian) of the Hochschwab area in the south-eastern part of the Northern Calcareous Alps of Austria.
Felix Schlagintweit, Wolfgang Pavlik
doaj   +1 more source

Calcareous algae from the Ordovician succession (Thango Formation) of the Spiti Basin, Tethys Himalaya, India

open access: yesActa Palaeobotanica, 2018
The calcareous algae Dasyporella silurica, Moniliporella multipora and Vermiporella fragilis are reported for the first time from the Middle Ordovician (Dapingian to Darriwilian) Thango Formation of the Spiti Basin of northern India (Pin Valley, Tethys ...
SHIVANI PANDEY, SURAJ K. PARCHA
doaj   +1 more source

Mangarara Formation: exhumed remnants of a middle Miocene, temperate carbonate, submarine channel-fan system on the eastern margin of Taranaki Basin, New Zealand [PDF]

open access: yes, 2009
The middle Miocene Mangarara Formation is a thin (1–60 m), laterally discontinuous unit of moderately to highly calcareous (40–90%) facies of sandy to pure limestone, bioclastic sandstone, and conglomerate that crops out in a few valleys in North ...
Armstrong BD   +25 more
core   +2 more sources

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