Cel\u00e9 \u00fazem\u00ed zdej\u0161\u00ed m\u011bstsk\u00e9 \u010d\u00e1sti je sou\u010d\u00e1st\u00ed v\u00fdznamn\u00e9 geologick\u00e9 jednotky ozna\u010dovan\u00e9 jako Barrandien. Tento \u00fatvar se rozkl\u00e1d\u00e1 na \u00fazem\u00ed st\u0159edn\u00edch a jihoz\u00e1padn\u00edch \u010cech. Jeho hlavn\u00ed osa je uklon\u011bn\u00e1 k\u00a0jihoz\u00e1padu a sleduje p\u0159ibli\u017en\u011b p\u0159\u00edmku Brand\u00fds nad Labem \u2013 Praha \u2013 Plze\u0148. Jm\u00e9no tato oblast dostala podle francouzsk\u00e9ho v\u011bdce Joachima Barranda (1799\u20131883), kter\u00fd velkou \u010d\u00e1st sv\u00e9ho \u017eivota v\u011bnoval v\u00fdzkumu geologie zdej\u0161\u00edch d\u00e1vn\u00fdch zkamen\u011bl\u00fdch mo\u0159\u00ed.<\/p>\n
Horniny, kter\u00e9 vystupuj\u00ed na \u00fazem\u00ed Barrandienu n\u00e1le\u017e\u00ed dv\u011bma velk\u00fdm geologick\u00fdm jednotk\u00e1m \u2013 proterozoiku (starohor\u00e1m) a star\u0161\u00edmu paleozoiku (star\u0161\u00edm prvohor\u00e1m: kambrium, ordovik, silur a devon).<\/p>\n
Ve zdej\u0161\u00ed m\u011bstsk\u00e9 \u010d\u00e1sti se setk\u00e1v\u00e1me pouze s\u00a0ordovikem, silurem a devonem. Nejstar\u0161\u00ed ordovik vytv\u00e1\u0159\u00ed pevn\u011bj\u0161\u00edmi k\u0159emenci str\u00e1\u0148 nad dostihov\u00fdm z\u00e1vodi\u0161t\u011bm, kter\u00e1 pokra\u010duje d\u00e1l p\u0159es\u00a0Radot\u00edn. M\u011bk\u010d\u00ed b\u0159idlice, podl\u00e9haj\u00edc\u00ed zv\u011btr\u00e1n\u00ed, vypl\u0148uj\u00ed depresi v\u00a0\u00fadol\u00ed Vltavy. Pevn\u011bj\u0161\u00ed v\u00e1pence a v\u00e1pnit\u00e9 b\u0159idlice, je\u017e tvo\u0159\u00ed ji\u017e n\u00e1padn\u011bj\u0161\u00ed v\u00fdchozy v\u00a0siluru, se nach\u00e1zej\u00ed p\u0159edev\u0161\u00edm v\u00a0okol\u00ed P\u0159\u00eddol\u00ed, pod\u00e9l ulice V\u00a0Dol\u00edch. A nakonec masivn\u00ed devonsk\u00e9 v\u00e1pence tvo\u0159\u00ed h\u0159bet vrchu Homolka, odkud pak pokra\u010duj\u00ed d\u00e1le a\u017e ke Slivenci. Zde se pak staroprvohorn\u00ed ulo\u017eeniny ztr\u00e1c\u00ed pod malou p\u00e1nvi\u010dkou mlad\u0161\u00edch, druhohorn\u00edch, nezvr\u00e1sn\u011bn\u00fdch vrstev.<\/p>\n
Zdej\u0161\u00ed geologick\u00e9 ulo\u017eeniny jsou star\u00e9 390 a\u017e 430 milion\u016f let a maj\u00ed r\u016fzn\u00e9 miner\u00e1ln\u00ed slo\u017een\u00ed. Jedn\u00e1 se hlavn\u011b o v\u00e1pence s\u00a0vysok\u00fdm obsahem uhli\u010ditanu v\u00e1penat\u00e9ho, d\u00e1le potom slab\u00e9 v\u00e1pnit\u00e9 b\u0159idlice, vyv\u0159el\u00e9 horniny diabasy bohat\u00e9 na nejr\u016fzn\u011bj\u0161\u00ed druhy miner\u00e1l\u016f. Toto rozd\u00edln\u00e9 miner\u00e1ln\u00ed slo\u017een\u00ed se odr\u00e1\u017e\u00ed jak v\u00a0po\u010dtu druh\u016f rostlin i drobn\u00fdch \u017eivo\u010dich\u016f \u017eij\u00edc\u00edch na jednotliv\u00fdch hornin\u00e1ch, tak v\u00a0jejich druhov\u00e9m slo\u017een\u00ed (tzv. v\u00e1pnomiln\u00e1 spole\u010denstva).<\/p>\n","protected":false},"excerpt":{"rendered":"
Cel\u00e9 \u00fazem\u00ed zdej\u0161\u00ed m\u011bstsk\u00e9 \u010d\u00e1sti je sou\u010d\u00e1st\u00ed v\u00fdznamn\u00e9 geologick\u00e9 jednotky ozna\u010dovan\u00e9 jako Barrandien. Tento \u00fatvar se rozkl\u00e1d\u00e1 na \u00fazem\u00ed st\u0159edn\u00edch a jihoz\u00e1padn\u00edch \u010cech. Jeho hlavn\u00ed osa je uklon\u011bn\u00e1 k\u00a0jihoz\u00e1padu a sleduje p\u0159ibli\u017en\u011b p\u0159\u00edmku Brand\u00fds nad Labem \u2013 Praha \u2013 Plze\u0148. … Cel\u00fd p\u0159\u00edsp\u011bvek