Seismic Structure of the Earth’s Crust in the Areas of Junction of the West–Siberian Plate and Siberian Platform

2010 ◽  
Author(s):  
V. Kuznetsov ◽  
A. Salnikov
Keyword(s):  
Siberian Platform ◽  
Earth’S Crust ◽  
Seismic Structure ◽  
The West ◽  
Earth's Crust

scholarly journals IV.—The Glacial Deposits of Northern Pembrokeshire

1906 ◽  
Vol 41 (1) ◽  
pp. 53-87
Author(s):  
T. J. Jehu
Keyword(s):  
Igneous Rocks ◽  
Earth’S Crust ◽  
The West ◽  
Great Abundance ◽  
Glacial Deposits ◽  
North East ◽  
The North ◽  
Earth's Crust

The area embraced in this paper consists of that part of Pembrokeshire which lies to the north and north-east of St Bride's Bay. Bounded on the west by St George's Channel and on the north by Cardigan Bay, it extends to the north-east as far as the mouth of the river Teifi, near Cardigan.That part of the country which lies in the immediate neighbourhood of St David's has, through the laborious researches of the late Dr Hicks and others, become well-known to geologists, and may now be regarded as classic ground. The solid geology of this promontory has given rise to much discussion, and has, perhaps, attracted more attention than that of any other part of the Principality. The reason for this great interest is to be sought in the facts that the rocks of this area are of a very great antiquity, and that the sedimentary series contain the remains of some of the earliest organic forms yet found in the earth's crust, whilst the igneous rocks are also displayed in great abundance and variety, and present us, in the words of Sir Archibald Geikie, with “the oldest well-preserved record of volcanic action in Britain.”

scholarly journals V.—On some Physical Changes in the Earth's Crust

1889 ◽  
Vol 6 (4) ◽  
pp. 165-171
Author(s):  
Charles Ricketts
Keyword(s):  
Earth’S Crust ◽  
The West ◽  
Red Sandstone ◽  
Maximum Thickness ◽  
The Government ◽  
Earth's Crust ◽  
Physical Changes ◽  
The Hill ◽  
As If

On the western flanks of the Malverns, the Upper Silurians are folded in several great anticlinals and synclinals, formed parallel to the axis of the Hill itself. To the west of Ledbury and again near Woolhope these contorted strata dip beneath the Old Red Sandstone, which, as computed by Phillips, has a maximum thickness of 8000 feet, that of the Upper Silurians being 2690 feet.The thickness of the strata of which the Longmynd is formed has been estimated by the Government Surveyors at not less than 26,000 feet, as exposed in their highly inclined edges; the beds dipping at an average inclination of 60° to the W.N.W. They thus appear as if they had been tilted by pressure against the more ancient rocks of the Caer Caradoc Range.

Deep seismic structure of the Earth's crust along the Baltic Sea profile

1994 ◽  
Vol 233 (3-4) ◽  
pp. 279-292 ◽  
Author(s):  
A.A. Ostrovsky ◽  
E.R. Flueh ◽  
U. Luosto
Keyword(s):  
Baltic Sea ◽  
Earth’S Crust ◽  
Seismic Structure ◽  
The Baltic Sea ◽  
Earth's Crust ◽  
The Baltic

scholarly journals ANALYSIS OF THE DEEP SEISMIC STRUCTURE AND SEISMICITY OF THE TRANSBAIKALIA (ALONG THE 1-SB PROFILE)

2019 ◽  
Vol 2 (2) ◽  
pp. 224-233
Author(s):  
Victor Solovyev ◽  
Alexander Salnikov ◽  
Viktor Seleznev ◽  
Vladimir Chechelnitsky ◽  
Nadezhda Gilyova ◽  
...  
Keyword(s):  
Rift Zone ◽  
Velocity Structure ◽  
Deep Structure ◽  
Baikal Rift Zone ◽  
Earth’S Crust ◽  
Seismic Structure ◽  
Elastic Parameters ◽  
S Waves ◽  
Close Proximity ◽  
Earth's Crust

An analyzing on the seismicity and the deep structure of Transbaikalia along the 1-SB profile is presented. Determined that areas of high seismicity associated with the blocks of the Earth's crust with a heterogeneous velocity structure. The site of the Baikal rift zone which is located in close proximity to the Muya earthquake (1957, M=7.6) is characterized by increased heterogeneity according to the values of P- and S-waves and of elastic parameters in the Earth’s crust upper part.

ON GEODYNAMIC CONDITIONS AND UNDERWATER-LANDSLIDE DEFORMATIONS IN THE ULUTAU FORMATION

2020 ◽  
Vol 0 (4) ◽  
pp. 46-52
Author(s):  
T.T. KAZANTSEVA ◽  
Keyword(s):  
Structural Characteristics ◽  
Research Area ◽  
Earth’S Crust ◽  
The West ◽  
Clastic Rocks ◽  
Underwater Landslide ◽  
Tectonic Development ◽  
Earth's Crust ◽  
Folded Structures ◽  
The Village

To understand the features of geodynamics during the accumulation of the systems of geological matter in the Earth's crust at the formation level of the Paleozoic Urals, this paper presents the author's factual materials on structural characteristics of clastic rocks of the flysch sequence of the Ulutau Formation (Middle Devonian Givetian) within the mapping area of the Urtazym zone of the Magnitogorsk Synclinorium. Here, to the west of the village of Tash-Tugay, rhythmites are developed in the lower reaches of the Tanalyk River that show very informative underwater interlayer dislocations: cross-bedding, spherical and folded structures serving as a decisive marker for the synchronism of sedimentation and dislocation. They characterize the deformation period in the tectonic development of the folded region, according to the main points of the thrust-nappe theory of the formation of the Earth's crust and the scientific research area «structural factor in theoretical geology».

DEPTH STRUCTURE FEATURES OF THE EASTERN STANOVOY FRAGMENT OF THE 8-DV GEOLOGICALGEOPHYSICAL SURVEY – BASE LINE (ACCORDING TO THE DSS DATA)

2020 ◽  
pp. 29-39
Author(s):  
V. M. Soloviev ◽  
◽  
A. S. Salnikov ◽  
V. S. Seleznev ◽  
T. V. Kashubina ◽  
...  
Keyword(s):  
Earth’S Crust ◽  
Base Line ◽  
Seismic Structure ◽  
Fold Belt ◽  
Longitudinal Waves ◽  
Surface Change ◽  
Central Asian ◽  
Tectonic Zones ◽  
Earth's Crust ◽  
Dss Data

The materials of deep seismic operations on the Vostochno-Stanovoy fragment of the survey base geophysical profile 8-DV within large tectonic zones – the Selengino-Stanovoy and Amur fold regions of the Central Asian fold belt are presented. It is shown that longitudinal waves from the boundaries in the earth’s crust and the surface of Mohorovichich were recorded from explosions on a 700-kilometer geophysical profile. An inhomogeneous structure was established according to the data of longitudinal waves of the upper part of the earth’s crust to depths of 15–20 km and the surface of Mohorovichich. In general, the thickness of the earth’s crust at the profile is 37–42 km; the effective velocities of longitudinal waves in the crust and refractor ones along the mantle surface change at the profile, respectively, from 6.35 to 6.5 km/s and from 7.9 to 8.5 km/s. The results obtained are discussed and established features of the seismic structure are compared with the tectonics of the region and materials from other studies.

Upper earth crust’s seismic structure on conjuction zone of Eurasian and Okhotomorskaya plates (according to head waves data)

2020 ◽  
Author(s):  
Pavel O. Polyansky ◽  
◽  
Alexander F. Emanov ◽  
Alexandr S. Salnikov ◽  
◽  
...  
Keyword(s):  
Digital Processing ◽  
Earth’S Crust ◽  
Depth Interval ◽  
Seismic Structure ◽  
Seismic Model ◽  
East Part ◽  
North East ◽  
Head Waves ◽  
Earth's Crust

Digital processing of CDP–data, which are registered on North–East part of profile 3–DV, is done. Time sections which are result from method of head waves dynamic conversion were achieved for tectonic blocks are located at conjuction zone of Eurasian and Okhotomorskaya plates. Coefficients of refraction on the upper Earth’s crust were calculated based on frequencies difference between initial seismic traces and traces–results of processing. Seismic model of 0–2 km depth interval was constructed.

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