{"id":1491,"date":"2020-04-10T08:00:00","date_gmt":"2020-04-10T06:00:00","guid":{"rendered":"https:\/\/beta.svetkamene.eu\/?p=1491"},"modified":"2021-02-09T00:10:07","modified_gmt":"2021-02-08T23:10:07","slug":"krajem-kameniku-na-ricansku-cast-2-a-lom-zernovka","status":"publish","type":"post","link":"https:\/\/svetkamene.eu\/index.php\/cs\/2020\/04\/10\/krajem-kameniku-na-ricansku-cast-2-a-lom-zernovka\/","title":{"rendered":"Krajem kamen\u00edk\u016f na \u0158\u00ed\u010dansku \u2013 Lom \u017dernovka, 1.&nbsp;d\u00edl"},"content":{"rendered":"\n<p><strong>Posledn\u00ed \u010dinn\u00fd lom v&nbsp;\u0161ir\u0161\u00edm okol\u00ed Muka\u0159ova se nach\u00e1z\u00ed na severoz\u00e1padn\u00edm okraji obce \u017dernovka v&nbsp;lese zvan\u00e9m Horka pobl\u00ed\u017e k\u00f3ty 443. K&nbsp;lomu vede p\u0159\u00edjezdov\u00e1 cesta z&nbsp;ulice Horka vedouc\u00ed z&nbsp;\u017dernovky do Babic. <\/strong><\/p>\n\n\n\n<div style=\"height:26px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Lom je j\u00e1mov\u00fd, na jeho dno je obt\u00ed\u017en\u00fd p\u0159\u00edstup, proto se k\u00e1men vytahuje je\u0159\u00e1bem nebo lanovkou a&nbsp;vyt\u011b\u017een\u00e9 bloky mohou m\u00edt hmotnost maxim\u00e1ln\u011b 5 tun. Zalo\u017een byl p\u0159ibli\u017en\u011b p\u0159ed 150 lety a&nbsp;v&nbsp;sou\u010dasnosti je v&nbsp;majetku jedn\u00e9 rodiny u\u017e n\u011bkolik generac\u00ed. T\u011b\u017eba je zam\u011b\u0159ena p\u0159edev\u0161\u00edm na pou\u017eit\u00ed v&nbsp;exteri\u00e9ru: dla\u017eebn\u00ed kostky, desky, schodi\u0161\u0165ov\u00e9 stupn\u011b, sloupky, obrubn\u00edky, ale k\u00e1men se m\u016f\u017ee opracov\u00e1vat i&nbsp;jako dopln\u011bk k&nbsp;um\u011bleck\u00fdm d\u00edl\u016fm nebo jako k\u00e1men n\u00e1hrobn\u00ed.<\/p>\n\n\n\n<p>\u017dula z&nbsp;lomu \u017dernovka byla vyu\u017eita nap\u0159.&nbsp;p\u0159i&nbsp;stavb\u011b \u0160t\u011bchovick\u00e9 p\u0159ehrady nebo vinohradsk\u00e9ho \u017eelezni\u010dn\u00edho tunelu, v&nbsp;posledn\u00edch letech pak na obklady stanice metra Palmovka, dla\u017ebu stanice metra Stra\u0161nick\u00e1, po&nbsp;roce 2000 se \u017eulov\u00e9 kostky z&nbsp;\u017dernovky dov\u00e1\u017eely i&nbsp;do ciziny, nap\u0159.&nbsp;na \u0161pan\u011blsk\u00fd ostrov Menorca.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"945\" height=\"709\" src=\"https:\/\/beta.svetkamene.eu\/wp-content\/uploads\/2020\/06\/jamovy_lom.png\" alt=\"\" class=\"wp-image-1493\" srcset=\"https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/jamovy_lom.png 945w, https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/jamovy_lom-300x225.png 300w, https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/jamovy_lom-768x576.png 768w\" sizes=\"(max-width: 945px) 100vw, 945px\" \/><figcaption><em>  Obr 2: J\u00e1mov\u00fd lom v&nbsp;\u017dernovce v&nbsp;roce 2016.   <br>  Foto: B. Dud\u00edkov\u00e1 Schulmannov\u00e1, 2016. <\/em><\/figcaption><\/figure>\n\n\n\n<p>Zdej\u0161\u00ed biotitick\u00fd granit s&nbsp;mal\u00fdm mno\u017estv\u00edm muskovitu je naz\u00fdv\u00e1n \u0159\u00ed\u010danskou (\u017eernovskou) \u017eulou, a&nbsp;pat\u0159\u00ed k&nbsp;nejmlad\u0161\u00edm intruz\u00edm st\u0159edo\u010desk\u00e9ho plutonick\u00e9ho komplexu (SPK). Ten je rozs\u00e1hl\u00fdm (~ 3200 km<sup>2<\/sup>) produktem pozdn\u011b devonsk\u00e9ho a\u017e ran\u011b karbonsk\u00e9ho (cca 354 a\u017e 336 mil. let) magmatick\u00e9ho oblouku andsk\u00e9ho typu maskuj\u00edc\u00edm rozhran\u00ed mezi moldanubikem a&nbsp;tepelsko-barrandienskou jednotkou. Zbytky metamorfn\u00edho pl\u00e1\u0161t\u011b, tzv.&nbsp;ostrovn\u00ed z\u00f3na, tvo\u0159\u00ed region\u00e1ln\u011b a&nbsp;kontaktn\u011b metamorfovan\u00e9, p\u0159ev\u00e1\u017en\u011b metabazick\u00e9 horniny proterozoick\u00e9ho a\u017e devonsk\u00e9ho st\u00e1\u0159\u00ed. Krom\u011b nich se tak\u00e9 vyskytuj\u00ed kyselej\u0161\u00ed, pozdn\u011b proterozoick\u00e9 metavulkanity j\u00edlovsk\u00e9ho p\u00e1sma, jako\u017e i&nbsp;alkalicko-v\u00e1penat\u00e9 starosedelsk\u00e9 a&nbsp;mirotick\u00e9 ortoruly, z\u0159ejm\u011b o&nbsp;n\u011bco star\u0161\u00ed (~ 370 mil. let) produkt magmatick\u00e9 aktivity stejn\u00e9ho oblouku. Magmatick\u00e9 horniny SPK byly roz\u010dlen\u011bny do n\u011bkolika magmatick\u00fdch suit na z\u00e1klad\u011b sv\u00e9ho st\u00e1\u0159\u00ed, petrologick\u00e9 povahy a&nbsp;chemismu, z&nbsp;nich\u017e tzv.&nbsp;\u0159\u00ed\u010dansk\u00e1 suita pat\u0159\u00ed k&nbsp;nejmlad\u0161\u00edm a&nbsp;nejkyselej\u0161\u00edm.<\/p>\n\n\n\n<div style=\"height:28px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><em>Pro Sv\u011bt kamene poskytl autor: RNDr. Barbora Dud\u00edkov\u00e1 Schulmannov\u00e1<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Posledn\u00ed \u010dinn\u00fd lom v&nbsp;\u0161ir\u0161\u00edm okol\u00ed Muka\u0159ova se nach\u00e1z\u00ed na severoz\u00e1padn\u00edm okraji obce \u017dernovka v&nbsp;lese zvan\u00e9m&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1493,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[372,336],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.1 - 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