[RO] AAAAAAAAAAAAAAAA
Arie protejata. Nu luati nimic.
[EN] AAAAAAAAAAAAAAProtected area. Do
not take anything.
[RO]
CARIERA CORABIA este un monument al naturii, situat pe
teritoriul comunei Gilau, pe versantul vestic al muntelui Corabia,
care îsi trage numele din forma sa iesita din comun. Din aceasta
cariera a fost extras materialul folosit la construirea barajului
de compensare “Talieni” din imediata vecinatate. Cu
aceasta ocazie au fost decopertate roci ultrametamorfice foarte
vechi, de mare valoare stiintifica, care pot fi, numai aici,
admirate la suprafata pamântului de geologi si turisti.
Acum aceasta zona este declarata arie protejata de importanta
nationala. În zona este interzisa exploatarea rocilor sau alta
activitate ce poate degrada acest unicat.
Ultrametamorfismul este denumirea generala data unor procese
care au loc la adancimi de cativa km sub scoarta pamantului, la
temperaturi ridicate si presiuni diferite sub influente provenite
din magme de mare adancime. In urma acestor procese rocile
initiale, de origine sedimentara, fara sa separe faza lichida se
apropie ca structura si compozitie mineralogica de granitoide, roci
de tip eruptiv, mai mult decat in starea lor initiala.
Termenul migma a fost utilizat pentru indicarea materialului
granitizat mobil, insuficient topit pentru a fi capabil de
intruziune, parte in procesul metamorfic, spre deosebire de magma
suficient de fluida pentru a fi capabila de intruziune adica a se
deplasa usor in campul gravitational. Fenomenul de intruziune NU il
intalnim in procesele metamorfice. Prin acumularea cantitativa a
topiturii se poate ajunge in ultima instanta ca sistemul semilichid
sa capete brusc o insusire noua fluiditatea, capacitatea de
intruziune, caz in care purtatorul material al proceselor
metamorfice, migma, va disparea si in locul ei va aparea un sistem
nou, calitativ deosebit, magma. Migma devine magma. Odata cu
aparitia magmei se termina orice proces metamorfic.
Fenomenele de tip ultrametamorfic au ca urmare formarea
migmatitelor si procesul granitizarii. Migmatitele sunt roci mixte
formate din doi componenti litologici intim asociati.
Primul dintre componenti reprezinta materialul primar autohton
(denumit si component vechi, substrat, paleosom) si este compus din
roci metamorfice de origine sedimentara ca: gnaise, micasisturi,
amfibolitice.
Al doi-lea component este materialul nou granitic (denumit si
material nobil, material activ, neosom). Acest material poate fi
format in situ - material autohton sau poate fi adus –
material alohton. Este reprezentat de granite, granodiorite,
pegmatite, aplite si cuart si se poate raspandi in neosom sub forma
de straturi subtiri, sub forma de vine, lentile, minerale separate,
pete sau diseminat.
Cei doi componenti ai migmatitului intra in actiune reciproc activa
si se intrepatrund in moduri diferite provocand schimbarea
compozitiei, a structurii si a texturii paleosomului.
In gnaisul migmatic din bazinul Rasca Mica – Somesul Rece
se intalnesc filoane si vinisoare de granit-aplit, pegmatit de
forma contorsionata, strans cutata numite generic ptygmatite.
Ptygmatitele din regiune apar in grupuri mici care nu au o
dezvoltare continua pe suprafete mari, cariera Corabia fiind tocmai
un astfel de grup.
Astfel in zona carierei Corabia se pot intalni variante de gnais
migmatic cu structura fin rubanata, gnais migmatic cu structura
microcutata, ptygmatite interpaturale microcutate, gnais strabatut
de un filon granitic, gnais cu zone budinate, ptygmatite
incrucisate in gnais si alte forme de manifestre a proceselor
ultrametamorfice.
La intrarea pe drumul spre cariera exista un indicator ce
informeaza asupra statutului de arie protejata. Respectati
intocmai.
Priveste mai de aproape rocile din cariera si vei vedea ca
difera de majoritatea tipurilor de roca cunoscute.
Descrie, te rog, proprietarului cutiei aceste roci inainte de a
loga
[EN]
CORABIA (SHIP) PIT is one of Nature’s monuments,
located within the commune Gilau, on the Western slope of mountain
Corabia, which was given its name by its uncommon shape. It is the
pit which provided the material used for the construction of the
adjustment dam “Talieni” situated in the immediate
neighborhood. On this occasion extremely ancient ultra metamorphic
rocks were revealed, rocks of great scientific value, which can be,
only in this place, admired on earth by geologists and
tourists.
At present, the area is declared to be protected, of national
importance. Rock exploitation and other activities susceptible of
degrading this unique relief are forbidden.
The ultra metamorphism is a general term attributed to processes
taking place at depths of several kilometers under the crust of the
earth, at high temperatures and various pressures under influences
generated by magmas of high depths. Following these processes the
initial rocks, of sedimentary origin, with no separation of the
liquid phase, resemble as structure and mineralogical composition
to granitoids, rocks of the eruptive type, more than in their
initial state.
The term migma was used to indicate the mobile granitized
material, insufficiently melted to be able of intrusion, part of
the metamorphic process, contrary to the sufficiently fluid magma
able to intrude/for intrusion, more exactly of light migration
within the gravitational field. The intrusion phenomenon cannot be
found in the metamorphic processes. The quantitative accumulation
of the melt can ultimately make the semi-liquid system to suddenly
achieve new features such as fluidity, the intrusion capacity, case
in which the material bearer of metamorphic processes, the migma,
shall disappear and in its place a new system shall appear,
qualitatively different, the magma. Migma becomes magma. The
occurrence of the magma stops any other metamorphic process.
The phenomena of the ultra metamorphic type generate the
creation of the migmatites and the granitization process. The
migmatites are mixed rocks formed of two intimately associated
litologic components.
The first of the components is the primary autochthon material
(also referred to as ancient component, substrate, paleosome) and
is formed of metamorphic rocks of sedimentary origin such as:
gneisses, mica shists, amphibolites.
The second component is the new material, the granitic material
(also refered to as noble material, active material, neosome). This
material can be formed in situ – autochthon or can be brought
by– alochton material. It is formed of granites,
granodiorites, pegmatites, aplites and quartz and can spread in in
neosome in thin layers, as vines, lens, separate minerals, spots or
disseminated.
The two components of the migmatite enter in mutually active action
interfere in various forms and determine a change of composition,
structure and texture of the paleosome.
In the migmatic gnais within the basin Rasca Mica –
Somesul Rece we can find veins and small veins of granite-aplite,
pegmatite of twisted form, tightly plicated generically known as
ptygmatites. The ptygmatites in the region appear as small groups
with no continuous development over large surfaces, Corabia pit
being such a group. Therefore within the Corabia pit we can find
forms of migmatic gnais of fine banded shape a, migmatic gnais of
micro plicated structure, micro plicated interlayer ptygmatites,
gnais crossed by granitic veins, gnais of sausage structure,
ptygmatites crossed in gnais and other forms of manifestation of
the a ultra metamorphic processes.
When you leave the main road for the quarry, you will see a sign
telling about the protected area status, indications how to reach
it and restrictions. Follow them accordingly.
Look closer at the rocks and you will observe their
characteristic feature, which is unlike that of most other type of
rock formations.
Please describe it to the owner before logging this cache.