BiH
Ovaj jedinstveni geomorfološki fenomen, nastao je u dugim nizom godina. Erozijom tla i pod uticajem agresivne sprege mrazeva, ljetnih vrućina, kiše i jakih vjetrova nastale su figure zanimljivih oblika. Svojim oblikom i sastavom podsjećaju na piramide u Koloradu (SAD) ili Dolomiti (Italija).
Pješčane piramide se prvi put pominju još u austrougarskom periodu, a prema nekim tvrdnjama stare su preko 200 godina.
Proces erozije traje i danas, tako da one ne nestaju, već rastu.
Prema riječima geologa Sjefudina Vrabca koji se bavio ovim prirodnim fenomenom, na području Miljevine, u bazenu koji je poznat po ležištu mrkog uglja, u krovini ulja javljaju se sedimenti koji su zapravo klasični sediment sastavljen od gline i konglomerati. Erozijom tih sedimenata, gline su podložne erozionim procesima, stvaraju se fenomeni, tzv. piramide koje su zastupljene u istočnom dijelu miljevinskog bazena, pojasnio je Vrabac. On je dodao da su konglomerati otpornije stijene i one štite taj prostor od intenzivnog procesa erozije, a gline bivaju odnešene. Iako nemaju piramidalan oblik, izbrazdani pješčani stubovi uzdižu se iz svojih širokih temelja i sužavaju prema vrhu i na taj način čine izvanrednu geomorfološku rijetkost na ovim prostorima.
Pješčane piramide
Zadaci učiniti:
1. Izmjerite veličinu piramide.
2. Da li je proces erozije traje do danas?
3. Da li postoji neki sličan na Balkanu (ako da, napiši gdje)?
4. Fotografija su dobrodošli, ali ne i obavezno, molim te nemoj spojleri odgovore!
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English
This unique geomorphological phenomenon, was created in long series of years. With erosion of the soil and under influence of aggressive frost compound, summer heat, rain and strong winds, interesting shape figures have been made. Their shape and composition remind of those in Colorado (USA) or Dolomites (Italy).
Sand piramids are mentioned for the first time in Austro - Hungarian period, and by some claims they are over 200 years old.
The erosion process lasts until today, so they do not disappear but grow up.
According to geologists Sjefudin Vrabec dealing with this natural phenomenon, in the area of Miljevina, in the area, which is known for the deposit of brown coal, oil in the roof appeared sediments that are really classic sediment composed of clays and conglomerates. Erosion of these sediments, clay is subject to erosion processes, created phenomena, so-called pyramids that are represented in the eastern part of the Miljevina basin, explained Vrabec. He added that the conglomerates resistant rocks and they protect that area of intense erosion process and the clay are being carried away. Although no pyramidal shape, striated sand poles rise from its broad foundation and narrow toward the top, and thus make an outstanding geomorphological uniqueness on these areas.
Sand pyramids
Tasks to do:
1. Measure the size of the pyramids.
2. Whether erosion process lasts until today?
3. Is there any similar place in the Balkans (if yes, write where)?
4. Photo are welcome, but not obligatory, please do not spoilers answers!
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