scholarly journals Algae, calcitarchs and the Late Ordovician Baltic limestone facies of the Baltic Basin

Facies ◽  
2019 ◽  
Vol 66 (1) ◽  
Author(s):  
Björn Kröger ◽  
Amelia Penny ◽  
Yuefeng Shen ◽  
Axel Munnecke
Keyword(s):  
Green Algae ◽  
Carbonate Platform ◽  
Late Ordovician ◽  
Baltic Basin ◽  
Low Latitude ◽  
Fine Grained ◽  
Baltic Countries ◽  
The Baltic ◽  
Algal Mounds ◽  
Shallow Part

Abstract The Late Ordovician succession of the Baltic Basin contains a characteristic fine-grained limestone, which is rich in calcareous green algae. This limestone occurs in surface outcrops and drill-cores in an extensive belt reaching from Sweden across the Baltic Sea to the Baltic countries. This limestone, which is known in the literature under several different lithological names, is described and interpreted, and the term “Baltic limestone facies” is suggested. The microfacies, from selected outcrops from the Åland Islands, Finland and Estonia, consists of calcareous green algae as the main skeletal component in a bioclastic mudstone-packstone lithology with a pure micritic matrix. Three types of calcitarch, which range in diameter from c. 100–180 μm, are common. Basinward, the youngest sections of the facies belt contain coral-stromatoporoid patch reefs and Palaeoporella-algal mounds. The Baltic limestone facies can be interpreted as representing the shallow part of an open-marine low-latitude carbonate platform.

scholarly journals Ordovician reef and mound evolution: the Baltoscandian picture

2016 ◽  
Vol 154 (4) ◽  
pp. 683-706 ◽  
Author(s):  
BJÖRN KRÖGER ◽  
LINDA HINTS ◽  
OLIVER LEHNERT
Keyword(s):  
Sea Level ◽  
Climatic Conditions ◽  
Late Ordovician ◽  
Reef Growth ◽  
Baltic Basin ◽  
Reef Development ◽  
The Baltic ◽  
Oceanographic Conditions ◽  
Main Factor

AbstractThe widespread growth of reefs formed by a framework of biogenic constructors and frame-lacking carbonate mounds began on Baltica during Ordovician time. Previously, Ordovician reef and mound development on Baltica was considered to be sporadic and local. A review of all known bioherm localities across the Baltic Basin reveals a more consistent pattern. Ordovician bioherms grew in a wide E–W-aligned belt across the Baltic Basin and occur in several places in Norway. Substantial reef development began simultaneously across the region during the late Sandbian – early Katian interval and climaxed during the late Katian Pirgu age. The current spatiotemporal distribution of bioherms is a result of interdependent factors that involve original drivers of reef development such as relative sea level, climate during the time of deposition and effects of post-depositional erosion. Oceanographic conditions were likely more favourable during times of cooler global climates, low sea level and glacial episodes. At the same time, the likelihood that bioherms are preserved from long-term erosion is higher when deposited during low sea level in deeper parts of the basin. A main factor controlling the timing of the reef and mound evolution was Baltica's shift toward palaeotropical latitudes during Late Ordovician time. The time equivalence between initial reef growth and the Guttenberg isotope carbon excursion (GICE) suggests that global climatic conditions were important.

scholarly journals PIH13 Consumption of Drugs for the Treatment of Benign Prostate Hyperplasia in Ukraine Compared to the Baltic Countries

2020 ◽  
Vol 23 ◽  
pp. S541
Author(s):  
L. Iakovlieva ◽  
O. Tkachova ◽  
N. Bezditko ◽  
O. Gerasymova ◽  
T. Bahlai ◽  
...  
Keyword(s):  
Benign Prostate Hyperplasia ◽  
Prostate Hyperplasia ◽  
Baltic Countries ◽  
The Baltic ◽  
Benign Prostate

scholarly journals The Influence of Manganese on Growth Processes of Hordeum L. (Poaceae) Seedlings

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1009
Author(s):  
Kirill Tkachenko ◽  
Irina Kosareva ◽  
Marina Frontasyeva
Keyword(s):  
Plant Genetic Resources ◽  
Acid Resistance ◽  
Normal Growth ◽  
Wide Distribution ◽  
Acidic Soils ◽  
Baltic Countries ◽  
High Concentrations ◽  
Northern Territories ◽  
Cis Countries ◽  
The Baltic

Manganese, as one of the xenobionts, belongs to the group of heavy metals, which, in high concentrations, can negatively affect the development of plants. In small concentrations, it is necessary for plants for normal growth and development. It is present in soils and is available to plants to varying degrees. In acidic soils, it often acts as a toxic element, and plants do not develop well and can even die. Screening major crops for manganese tolerance is essential. Based on the analysis of the collection of barley (Hordeum L., Poaceae), the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR) presented data that manganese-tolerant varieties and samples are concentrated in western and northern countries with a wide distribution of soils with low pH levels and high contents of mobile manganese. It follows from the diagnostic results that the maximum number of barley genotypes resistant to manganese is concentrated in Sweden, Finland, the northwestern and northern regions of the CIS countries, and the Russian Federation. In most cases, the samples tolerant to Al showed resistance to Mn as well, which is of great interest for further study of the mechanisms of plant resistance to these stressors. As a rule, samples from the northern territories—zones of distribution of acidic soils—were highly resistant. In this case, the role of the species belonging to the sample was leveled out. The highlighted areas (Scandinavia (Finland, Sweden), northern and northwestern regions of Russia, Belarus, and the Baltic countries) are sources of germplasm valuable for selection for acid resistance of barley.

Satellite altimetry of large lakes of the Baltic Basin

2014 ◽  
Author(s):  
S. A. Lebedev ◽  
Yu. I. Troitskaya ◽  
G. V. Rybushkina ◽  
M. N. Dobrovolsky
Keyword(s):  
Satellite Altimetry ◽  
Baltic Basin ◽  
Large Lakes ◽  
The Baltic

Reconstructing the Younger Dryas ice dammed lake in the Baltic Basin: Bathymetry, area and volume

2007 ◽  
Vol 57 (3-4) ◽  
pp. 355-370 ◽  
Author(s):  
Martin Jakobsson ◽  
Svante Björck ◽  
Göran Alm ◽  
Thomas Andrén ◽  
Greger Lindeberg ◽  
...  
Keyword(s):  
Younger Dryas ◽  
Baltic Basin ◽  
Dammed Lake ◽  
The Baltic ◽  
Area And Volume

scholarly journals Controlling Shipping Along the North European Trade Axis

1971 ◽  
Vol 24 (4) ◽  
pp. 553-556
Author(s):  
D. J. Lindsay
Keyword(s):  
Weather Conditions ◽  
North Coast ◽  
Baltic Basin ◽  
Long Distance ◽  
The North ◽  
Large Numbers ◽  
Straight Line ◽  
European Trade ◽  
Trade Route ◽  
The Baltic

By the North European Trade Axis is meant the trade route from Ushant and Land's End, up the English Channel, through the Dover Strait fanning out to serve eastern England, the north coast of continental Europe and leading to the Baltic Basin. Recent events in this area have left a feeling that some form of tightening of control is not only desirable, but is rapidly becoming imperative. There is a basic conflict between the two forms of shipping using the area: the local users who use the area more or less constantly, and the long-distance traders, usually much larger, which arrive in the area for a brief stay after a prolonged period at sea, which has usually been in good weather conditions. Frequently these latter ships have a very poor notion of the hornet's nest into which they are steaming when they arrive. The net result is all too often the same: the local users, with familiarity breeding contempt, wander about as they see fit, with scant regard for routing or the regulations; all too often the big ships arrive from sea with navigating staffs who are too confused, sometimes too ignorant—and sometimes too terrified—to do much more than blunder forward in a straight line hoping for the best. Quite obviously this is not a total picture, and there are large numbers of ships which navigate perfectly competently, but the minority of those which do not seem to be rising rapidly, and show every sign of continuing to increase.

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