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Download "§12 "Тектоническое строение", География 8 класс, Домогацких"

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#учебниквслух
аудио уроки
школьный учебник
география
8 класс
домогацких
тектоническое строение
строение земной коры
тектонические карты
складчатые пояса
структурные части платформы
евразиатская литосферная плита
складчатый пояс
осадочный чехол
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00:00:04
grade lesson topic
00:00:06
tectonic structure almost the entire
00:00:10
territory of our country is located within the
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Eurasian lithospheric plate this
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plate occupies a huge area and Russia
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occupies only part of it borders
00:00:23
lithospheric plates mostly lie
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far from the borders of our country
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several adjoin the Eurasian plate
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plates large North American
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Pacific relatively small
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willingly Morskaya and Amur
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there are complex and diverse
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processes associated with the collision and
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rarefaction of lithosphere blocks the
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rest of the country's territory is
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geologically
00:00:55
relatively calm, however this was not
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always the case in geological history there were
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periods when
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significant geological events took place on the territory of Russia
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In the Proterozoic, the
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territory of the modern Central Siberian
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plateau was broken up by a system of
00:01:16
deep wrinkles along which
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mantle material rushed to the surface of the earth for many
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millions of years,
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almost continuous
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volcanic eruptions continued over a huge area, traces of these
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eruptions can be traced even in the
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modern topography, the plateau
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began to move in the Carboniferous period 2 lithospheric plates
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that formed the modern
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Eurasian one, as a result, on their
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border a huge mountain
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range was formed in height almost equal to
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modern ones, quite a few of them
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where it now stands in the same place where it
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arose only weathering forces
00:02:01
completely changed its appearance in place of snow-
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capped peaks rising to the very clouds,
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now low heavily destroyed mountains of
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Uralsk
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in the Mesozoic, a vast area of ​​land
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lying east of the Urals sank
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two to three kilometers and in place of the
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West Siberian Plain there was a huge
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sea to characterize the history of the
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formation and structure of the earth's crust,
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tectonic maps are used, these
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maps depict the main elements of the
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structure of the earth's crust tectonic
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structures the main tectonic
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structures are platforms and
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folded belts
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platforms are large two to three thousand
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kilometers in diameter relatively
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stable sections of the earth's crust
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once in place of the platforms there were mountains under the
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influence of weathering forces and did not
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collapse the earth's surface
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was leveled and layers were deposited on it
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sedimentary rocks clay sands
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limestones
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how in place of the folded belt
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platforms are formed and the mountains are replaced by
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plains the structure of the platforms there are
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two tiers the lower tier
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is a base called the
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foundation or base layers of
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rocks in the base of the platform mortal
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folds are the remains of those same folded
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choir that were here before the upper a
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layer of sedimentary rocks is called a
00:03:47
sedimentary cover; it is thicker than rocks,
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most often of clastic origin,
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which cover the earth's surface,
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hiding the unevenness of the base. According to the age of the
00:04:01
foundation, the platforms are divided into ancient and
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young; in ancient platforms, the foundation was
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formed in the Warfare and
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Proterozoic eras; in young
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platforms, in the Paleozoic era, the relief
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there are vast plains,
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each tier of the platform has
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its own minerals, the folded
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foundation
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most often contains a variety of ores, and
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in the sedimentary cover, oil, gas, coal, salts and
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other fossils of sedimentary
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origin, the surface of the folded
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base of the platforms is uneven, so the
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depth of occurrence of its individual parts
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varies depending on the depth of
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occurrence on the platforms. shields and
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slabs extensive outcrops of the
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platform foundation to the surface are called
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abacus within the abacus
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very ancient rocks
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that never lay at the base of the mountains come to the surface the
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lowered parts of the platform foundation
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covered with a thick sedimentary cover
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several kilometers thick are called
00:05:16
slabs in the tectonic structure of Russia
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several large abacus can be distinguished
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and plates last year we talked
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about the eras of mountain building or
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folding,
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the territory of our country, like the whole
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earth, has gone through several such eras, the mountains
00:05:38
formed in one or another era of
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folding have different ages, the
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area of ​​​​the most ancient folding
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which occurred in the Harp and part of the
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Proterozoic era occupies a huge
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territory of our country,
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mountains of this age are, of course, long gone,
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since they arose more than a billion
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years ago and were completely destroyed by weathering forces.
00:06:05
rocks of this age form the
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foundation of the ancient platforms of the country. In
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some places, these ancient
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rocks of a folded base reach the
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surface of the earth. In these places there
00:06:19
are large shields Baltic
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Aldan
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and Anabar at the beginning of the Paleozoic
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continued bureau formation that
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began in the Proterozoic ska and time this
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period is called the Baikal
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folding and there were few traces left
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throughout the first half of the Paleozoic
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era went to the Lydon ska and mountain building
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which in the second half of the era was replaced by the
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Herzensky as a result of the Koli Donskoy
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300 million years ago and the Kerch
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150 million years ago, folding
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between the ancient platforms formed
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mountains, these ancient mountains were gradually
00:07:05
destroyed, but in the Cenozoic
00:07:08
they were uplifted and younger than now, new
00:07:11
mountains formed at the beginning of the Mesozoic
00:07:14
in the northeast of Eurasia, a
00:07:17
mobile folded belt of the Mesozoic arose,
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and at first a depression of the earth's crust arose
00:07:23
and large areas were occupied by milka
00:07:27
water seas at the end of the Cretaceous period, the
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subsidence of the land surface gave way to
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an ascent, which led to the formation of
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several large mountain systems in
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Siberia and in the Far East a
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number of mountain systems arose: the Verkhoyansk
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ridge, the Chersky ridge, the ridges of Chukotka and
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Sikhote-Alin
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in the region of Cenozoic folding in
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Russia includes the
00:07:55
Alpine in the south and the Pacific in the
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east according to iso, although the Alpine
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belt
00:08:03
includes a relatively small region of
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Russia, the Caucasus and Crimean mountains
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formed about 5-10 million years
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ago in the Pacific belt, the Pacific
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Ring of Fire
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which borders the ocean on almost all
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sides in within Russia includes the mountains
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of Kamchatka, Sakhalin and the Kuril Islands,
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mountain building continues here and in
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our time it is accompanied by strong
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earthquakes and frequent
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volcanic eruptions. Let us repeat the main thing in the
00:08:42
tectonic structure of Russia, there are
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sections of the ancient Eastern European and
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Siberian
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and young western
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mountain and Pechora platforms occupying
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most of the country's territory
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folded belts of different ages
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separate and surround the platform
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areas of the
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Russian mountains; they were formed in different eras
00:09:06
of folding; the
00:09:07
oldest mountains in the country are located in the
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Baikal region,
00:09:12
and the youngest are in the Far East

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