Chlumska Mountain
Chlumská
Mountain is a table rock located in the northern part of the
Manetín Basin, which is a tectonically conditioned depression
stretched in the direction of north – south. The basin
is part of the central Bohemian Anthracolithic system. Up until the
beginning of the Upper Carboniferous, the entire basin was exposed
to denudation, and sedimentation, which lasted roughly until the
period of the Upper Stephanian, started as late as in the
Westphalian D. All carboniferous complexes of strata are developed
here, even though some only partially.
Chlumská
Mountain ranks among the greatest manifestations of volcanism in
terms of area in the southern forefield of the Doupov Mountains.
Since the times of its formation it has been facing the effects of
exogenous factors and it is gradually disappearing. However, this
long-term process simultaneously enables the genesis of new forms,
which are being created in the crumbling lava sheets. The gradual
weathering of rocks results in rock outcrops being modelled into
the shapes of rock columns, towers or rock mushrooms; rock cavities
or rock basins form. Thanks to slow sinking of blocks into
the plastic subbase, on platforms there occurs the settlement of
soil layers into the enlarging space of fissures between the
blocks, thereby forming pseudo-sinkholes of various dimensions.
However, these morphosculptures also undergo their development,
which leads to their disappearance.
On Chlumská
Mountain we can find four marked debris fields, which always occur
in a steep slope (between 30° and 40°) below the rocky edge of a
platform. The width of individual fields in the upper part ranges
from fifteen metres to twenty metres.
Several sites
occur here with rock outcrops, and only two of them can rank among
the most marked ones, see Fig. 2.
To log this earthcache find, you must
fulfill the following requirements:
1)
How and when was Chlumská Mountain
formed?
2)
What base does predominate on Chlumská
Mountain?
3) At what
elevation above sea-level is the Chumska hora situated (according
to guidepost)
4) Add your
photo and a photo of a GPS device at the triangulation bar
(spoiler)
The answers to the questions please send
via e-mail in my profil, thanks.
Chlumska hora
O dominantach
manetinska koluje uz po staleti rada tajemnych povesti a jedna z
nich vypravi i o vzniku dvou stolovych hor – Kozelky a
Chlumske hory.
Na vrcholku Spicaku jednoho krasneho dne odpocival skritek, kdyz tu
k nemu prisli dva obri. Oba se chteli posadit na skritkovo misto,
ale nemohli se dohodnout, ktery z nich by to mel byt. Nakonec
poprosili skritka, aby za ne rozhodl. Skritkovi se ovsem ze sveho
mistecka vubec nechtelo a tak vymyslel lest a pravil:
„Polozte se oba na zem a ten z vas, ktery bude vetsi, se
posadi na me misto.“ Obrum se takove rozhodnuti zdalo
spravedlive a polozili se do travy. Lstivy skritek je v tom
okamziku promenil v kamen a od te doby se vedle sebe vyjimaji tyto
dva vrchy (ustni podani).
Chlumska hora je stolova
hora, ktera se nachazi v severni casti Manetinske panve, coz je
tektonicky podminena deprese protazena ve smeru sever–jih.
Panev je soucasti stredoceskeho permokarbonu. Az do pocatku
svrchniho karbonu byla cela panev vystavena denudaci a teprve ve
vestfalu D zapocala sedimentace, ktera trvala zhruba do obdobi
svrchniho stefanu. Jsou zde vyvinuta vsechna karbonska souvrstvi, i
kdyz nektera jen castecne.
Chlumska hora patri k
plosne nejvetsim projevum vulkanismu v jiznim predpoli Doupovskych
hor. Od dob sveho celi vlivum exogennich cinitelu a postupne
zanika. Tento dlouhodoby proces vsak zaroven umoznuje vznik novych
formem, ktere se v rozpadajicich se lavovych prikrovech vytvareji.
Postupnym zvetravanim hornin jsou skalni vychozy modelovany do
tvaru skalnich sloupu, vezi ci skalnich hribu, vznikaji skalni
dutiny nebo skalni misy. Diky pomalemu zaborovani bloku do
plastickeho podlozi dochazi na plosinach k sesedani pudnich vrstev
do zvetsujiciho se prostoru puklin mezi bloky a vytvari se tak
pseudozavrty ruznych rozmeru. I tyto morfoskulptury vsak
prodelavaji svuj vyvoj, ktery smeruje k jejich zaniku.
Na Chlumske hore nalezneme ctyri vyrazna sutova pole, ktera se vzdy
vyskytuji na strmem svahu (mezi 30° a 40°) pod skalnatym
okraj
Vyskytuje se zde nekolik
lokalit se skalními výchozy, pricemž mezi ty výraznejší
mužeme pocítat pouze dve viz. Obr. 2
K zalogovani earthcache je nutno odpovedet na tyto otazky
:
1) Jakym zpusobem a kdy
vznikla Chlumska hora?
2) Jaky podklad
prevazuje na Chlumske hore?
3) Na turistickem
rozcestniku zjisti nadmorskou vysku (nebo zmer pomoci
GPS)
4) K logu pripojte
fotografii Vas a pristroje GPS u lavicky nebo triangulacní
tyce.
Odpovedi me zaslete pres profil na muj email, diky.
WWW
pocítadlo teto stranky ríka, ze jste navstevnik cislo 