scholarly journals A vertical water exchange of the groundwater in the central part of Moscow artesian basin

2017 ◽  
pp. 30-34
Author(s):  
N. V. Fisun
Keyword(s):  
Water Exchange ◽  
Upper Devonian ◽  
Piezometric Level ◽  
Lower Carboniferous ◽  
Artesian Basin ◽  
Underground Waters ◽  
Pressure Surface ◽  
Moscow Syneclise ◽  
The Difference ◽  
Subterranean Waters

The hydrogeological features of the central part of the Moscow artesian basin (MAB) under the natural conditions provided the existence of the downward vertical flows of the groundwater, the formation of the fresh underground waters of the Carboniferous complex, desalination of the Upper Devonian subterranean waters. The long exploitation of the Aleksin-Protvino horizon in the central part of the MAB led to the formation of a depression of the piezometric level with a depth of 80 m, as well as a change in the ratio of the absolute marks of the piezometric surfaces of the groundwater of the Lower Carboniferous and the Upper Devonian, and the creation of prerequisites for the changing of the orienfafion of the vertical wafer exchange between them. A map of the difference in pressures between the Aleksin-Protvino and the Upper Devonian horizons, compiled by the author, shows this situation. In a vast zone of the central part of the MAB, the pressure surface of the Alexin-Protvino horizon is 30-50 m below the upper Devonian horizon. Under these conditions, it seems important to study the Upper Devonian aquiferous complex as a possible source of the «contamination» of the groundwater of the Lower Carboniferous, especially in the zones of active lineaments of the Moscow syneclise.

scholarly journals Sources and mechanisms of seawater freshening at the Tsivol’ki and Sedov’ bays (Novaya Zemlya): isotope (δD, δ18О) data

2019 ◽  
Vol 59 (6) ◽  
pp. 928-938
Author(s):  
E. O. Dubinina ◽  
S. A. Kossova ◽  
A. Yu. Miroshnikov
Keyword(s):  
Surface Waters ◽  
Water Exchange ◽  
Free Water ◽  
Kara Sea ◽  
River Waters ◽  
Fresh Waters ◽  
Novaya Zemlya ◽  
Deep Waters ◽  
Continental Runoff ◽  
The Difference

Three-year monitoring of isotope (D, 18О) parameters in the waters of the Sedov and Tsivolki bays (Novaya Zemlya) was carried out. The fresh waters of the bays are originated from several sources (continental runoff, precipitations, and waters going from the archipelago). The freshening extent and sources of fresh waters are different at the different depth. The D and 18О values varies only in the surface waters which contains more than 30% of fresh component. In 2015 the surface waters of Sedov bay were represented by Ob river waters, and the surface waters of Tsivolki bay were enriched by the runoff from Novaya Zemlya. Deep waters in both bays show signs of desalination by high latitude atmospheric precipitations. These waters can be transferred to the southeast coast of Novaya Zemlya through the trenches of St. Anne and Voronin. The difference in the freshening mechanisms of the waters of Sedov and Tsivolka bays is determined by different bottom morphologies and different degrees of free water exchange with the Kara Sea.

Phylogeny, speciation, and zonation of Siphonodella (Conodonta, Upper Devonian and Lower Carboniferous)

1978 ◽  
Vol 7 (2) ◽  
pp. 102-120 ◽  
Author(s):  
Charles A. Sandberg ◽  
Willi Ziegler ◽  
Klaus Leuteritz ◽  
Susan M. Brill
Keyword(s):  
Upper Devonian ◽  
Lower Carboniferous

Postglacial transgressive shales of Upper Devonian–Lower Carboniferous boundary of the Parnaíba Basin

2020 ◽  
Vol 101 ◽  
pp. 102621 ◽  
Author(s):  
Ailton da Silva Brito ◽  
Joelson Lima Soares ◽  
Sidney Gonçalo de Lima ◽  
Afonso César Rodrigues Nogueira ◽  
Guilherme Raffaeli Romero ◽  
...  
Keyword(s):  
Upper Devonian ◽  
Lower Carboniferous ◽  
Parnaíba Basin

Fishes of the Old Red Sandstone and Systemic Boundaries Blossburg, Pennsylvania 1830-1900

1992 ◽  
Vol 11 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Alan Leviton ◽  
Michele Aldrich
Keyword(s):  
New York ◽  
Fish Fauna ◽  
Field Work ◽  
Upper Devonian ◽  
Boundary Problems ◽  
Lower Carboniferous ◽  
Red Sandstone ◽  
Survey Report ◽  
The 19Th Century ◽  
Floodplain Sediments

During the Late Devonian, in what is now northcentral Pennsylvania, slow moving streams meandered across the plain of the "Catskill" Delta. A varied fish fauna lived in these streams, and their remains are entombed in the ancient stream channel and floodplain sediments. In the 1830's, English railroad engineer Richard Cowling Taylor visited the coal mining community of Blossburg and remarked on the analogy between the Old Red Sandstone of England and that found near Blossburg. Not long afterwards, James Hall (1811-1898), best known for his work on Paleozoic invertebrates of New York, also visited Blossburg to clear up vexing boundary problems in the New York formations. He obtained fish scales from the red sandstones, many of which he identified as scales of Holoptychus nobilissimus, a crossopterygian fish described by Louis Agassiz in 1839. In his annual report for 1839 to the New York Legislature, Hall also took note of some large scales, which were unlike any previously described. Under pressure from the Governor, Hall, like the other survey scientists, had to submit timely reports even if studies were incomplete, and he hurriedly described the new scales, referring them to a new genus and species, Sauritolepis taylori. In his final survey report (1843). Hall dealt more fully with the new fish, renaming it Sauripteris taylori based on the fin structure, the significance of which he had not earlier recognized. The Blossburg fishes did not languish in obscurity; James DeKay referred to them in his checklist of fishes of New York, as did Charles Lyell in his 1845 Travels in North America. In 1890 John Strong Newberry placed the fish fossils in the Lower Carboniferous; he also described several new species. Hall's handling of the fossil fish he had before him and, indeed, the reasons for entering Pennsylvania in the first place, are emblematic of the way much science was practiced in the first half of the 19th century. Further, recent field work in the Blossburg area shows Hall's astuteness as a field geologist for he correctly placed the fish in the Upper Devonian, although in this region the Upper Devonian-Lower Carboniferous boundary is not well defined.

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