scholarly journals A unique occurrence of a psammosteid heterostracan on the peri-Gondwanan shelf in the Lower/Middle Devonian boundary marine deposits

2016 ◽  
Vol 72 (3-4) ◽  
pp. 155-160 ◽  
Author(s):  
Valéria Vaškaninová ◽  
Petr Kraft
Keyword(s):  
Brackish Water ◽  
Middle Devonian ◽  
Vascular Plants ◽  
Water Environment ◽  
Variscan Orogeny ◽  
Dry Land ◽  
Marine Deposits ◽  
Prague Basin ◽  
Brackish Water Environment

A rare psammosteid heterostracan (Agnatha) occurrence in the Devonian of the Prague Basin is indicative of a dry land influence in the regional palaeogeography. This argument is strongly supported by the appearance of vascular plants, but the studied vertebrates allow us to presume a local brackish water environment. These conditions are considered to be related to a supposed land in the vicinity of the preserved relic of Devonian rocks in the Teplá-Barrandian unit. Such unique conditions were not repeated in the area despite the increasing extent of continental environment related to the rising Variscan Orogeny.

scholarly journals Organic geochemistry of the Lower Jurassic Sortehat Formation, Jameson Land, East Greenland

1994 ◽  
Vol 164 ◽  
pp. 5-18
Author(s):  
H Krabbe ◽  
F.G Christiansen ◽  
G Dam ◽  
S Piasecki ◽  
L Stemmerik
Keyword(s):  
Brackish Water ◽  
Organic Geochemistry ◽  
Water Environment ◽  
Lower Jurassic ◽  
Hydrocarbon Generation ◽  
Data Set ◽  
East Greenland ◽  
Potential Biomarker ◽  
Biomarker Analysis ◽  
Brackish Water Environment

Biomarker analyses of Lower Jurassic shales from the Sortehat Formation, Jameson Land, central East Greenland carried out in combination with palynological studies demonstrate deposition in a fresh to brackish water environment, which became increasingly saline towards the top. The formation is regionally immature to early mature with respect to hydrocarbon generation, and the lowermost 2–20 m have a fair generation potential. Biomarker analysis of the brackish water part shows dominance of C16–C21 n-alkanes, high pristane/phytane ratios, high hopane/sterane ratios, high relative amounts of C29–C31 hopanes and C2717α-trisnorhopane. Steranes are dominated by C29 isomers. The organic matter is composed of bacteria, algae and land plants interpreted from biomarker distributions. The combined data set suggests that deposition took place during an overall rise in relative sea level.

Bacterial freshwater species successfully immigrate to the brackish water environment in the northern Baltic

2005 ◽  
Vol 50 (3) ◽  
pp. 945-956 ◽  
Author(s):  
Veljo. Kisand ◽  
Nina. Andersson ◽  
Johan. Wikner
Keyword(s):  
Brackish Water ◽  
Water Environment ◽  
Freshwater Species ◽  
Brackish Water Environment

Submodels of a Brackish Water Environment.

1982 ◽  
Vol 3 (3) ◽  
pp. 243-253 ◽  
Author(s):  
Manfred Bölter ◽  
Gerd Liebezeit ◽  
Karin Wolter ◽  
Urban Palm-Gren
Keyword(s):  
Brackish Water ◽  
Water Environment ◽  
Brackish Water Environment

Ecology of the Sponges of a Brackish Water Environment, at Beaufort, N. C.

1947 ◽  
Vol 17 (1) ◽  
pp. 31-46 ◽  
Author(s):  
M. W. de Laubenfels
Keyword(s):  
Brackish Water ◽  
Water Environment ◽  
Brackish Water Environment

The response ofScenedesmus species to the brackish water environment

1974 ◽  
Vol 8 (1-2) ◽  
pp. 224-231 ◽  
Author(s):  
L. R. Mur
Keyword(s):  
Brackish Water ◽  
Water Environment ◽  
Brackish Water Environment
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