SI
Huzarski skok
Pri Dravogradu, kjer se v Dravo steka desni pritok Meže, vstopi reka Drava v slikovito Dravsko dolino med Kozjakom na severu in Pohorjem na jugu in drugo za drugim poganja šest hidroelektrarn. Od Ruš naprej teče po širši, gosto naseljeni dolini vse do Maribora. Z obeh strani dobiva številne hudourniške pritoke, med njimi tudi Kamniški potok.
Na levem bregu tik za hidroelektrarno Mariborski otok, kjer se Kamniški potok izliva v Dravo, najdemo 2 manjša slapova, ki se prelivata čez zanimive črne kamnine, imenovane marinski lapor. Ta stena je poznana pod imenom Huzarski skok. Redke staromiocenske kamenine so edine te vrste v Sloveniji, lokalna ambientalna znamenitost pa je hidrološki in geomorfološki naravni spomenik.
Huzarski skok je svoje ime dobil leta 1849, ko je nad previsnimi stenami pri izlivu potoka potekala bitka med domačo vojsko in Madžari, ki so odhajali domov. Dva huzarja, ki sta se hotela rešiti, sta skočila prek sten v Dravo. Za oba se ni končalo dobro, saj je eden utonil, drugega pa so kasneje ujeli. Območje Kamniškega potoka med cesto in Dravo ter pod previsno steno, v kateri so nekoč ženske prale perilo, se danes imenuje Huzarski skok.
Huzarji
Marinski lapor
Podravinje je v veliki meri prekrito z mladimi srednje in zgornjepliocenskimi sedimenti, ki jih sestavljajo ilovice, peski in prodniki. Le na jugu prehajajo v obravnavano področje starejše miocenske plasti: sarmatske, miocenski marinski konglomerati, nuliporni in litavski apnenci in miocenski marinski laporji ter peščenjaki.
Vse te starejše miocenske plasti so zastopane severno od Dravinje le v ozkem pasu. So močno nagubane, na njih so pliocenski prodniki in peski naloženi diskordantno (neskladno). Obsežne ravnine pa zapolnjujejo pleistocenski sedimenti in aluvij.
Rečni lapor
Lapor spada med sedimentne kamnine, ki nastajajo v ustreznem okolju v morju ali pa redkeje v jezerih. Od tod tudi ime "Marinski" (angl. marine=morje). Ime "Marinski lapor" je uvedel A. Winkler (jhb. d. geol. Reichsansfalt 1913), prevzel ga je med drugimi tudi F. Heritsch (vir: Geografski vestnik 1927; Maribor, Geomorfološke razmere). Navadno je lapor temno sive barve, lapor pri Huzarskem skoku pa je izrazito črn. Takšne barve je predvsem zaradi organskih vključkov. Lapor nastane, kadar se zrna gline, apnenca ali dolomita združijo. Lapor je gladka snov, uporablja se tudi za gradbeni material. Glina v laporju je sedimentnega izvora, sestavljena predvsem iz drobnozrnatih mineralov. Lapor z lahkoto odkrušimo, ker vsebuje drobne delce gline.
Nahajališča laporja v Sloveniji
Vprašanja
1. Oglej si stene laporja tik pred izlivom v Dravo. Ali so stene popolnoma črne ali pa najdeš kje tudi vključke sivega laporja?
2. Kako vključki izgledajo (ali so podolgovati, navpični/horizontalni ali so okroglo/elipsasti) in kakšna je njihova velikost [cm]?
3. Voda ponavadi oblikuje lapor tako, da je popolnoma gladek. Ali je lapor na stenah tudi povsem gladek? Opiši zakaj je takšen.
4. Poišči košček laporja. Ali bi z njim lahko pisal kot z ogljem? Ali je trd ali mehek in katera snov mu daje trdnost ali mehkobo?
5. Na tem mestu naredite fotografijo sebe ali vašega osebnega predmeta. Fotografija mora vsebovati vaše GC ime in datum obiska, napisano na papirju ali kjerkolipačže.
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Viri:
https://pd-mbmatica.si/odseki/odsek-za-varstvo-narave/dravska-dolina/
https://sl.wikipedia.org/wiki/Kamnica,_Maribor#Huzarjev_skok
https://www.protectedplanet.net/326217
https://gis.gov.si/MK_eVRDpredpis/p0821_1.pdf
http://www.digitalna-knjiznica.bf.uni-lj.si/gozdarstvo/md_bobic_cervek_ziva.pdf
https://eucbeniki.sio.si/geo9/2652/index1.html
https://giam.zrc-sazu.si/sites/default/files/zbornik/GZ_0501_253-273.pdf
http://zgs.zrc-sazu.si/Portals/8/Geografski_vestnik/2_Pred1999/GV_0301_001_019.pdf
EN
Hussar's jump
At Dravograd, where the right tributary of the river Meža flows into the river Drava, the Drava enters the picturesque Drava Valley between Kozjak in the north and Pohorje in the south. The river drives six hydroelectric power plants one after the other. From Ruše on, it flows through a wider, densely populated valley all the way to Maribor. It has numerous torrential tributaries on both sides, including Kamniški stream.
On the left bank, just behind the hydroelectric power plant named Mariborski otok, where the Kamniški stream flows into the Drava, there are 2 smaller waterfalls that overflow over interesting BLACK rocks called marine marl. This rocks are known as the Hussar's Jump. Rare Old Miocene rocks are the only ones of their kind in Slovenia, and the local ambient landmark is a hydrological and geomorphological natural monument.
The Hussar's Jump got its name in 1849, when a battle took place above the walls at the mouth of the stream between the local army and the Hungarians, who were leaving for home. Two hussars, who wanted to escape, jumped over the walls into the river Drava. It didn’t end well for both, as one drowned and the other was later caught. The area of Kamniški stream between the road and the Drava and under the overhanging wall is now called Hussar's Jump.
Huzars
Marine Marl
Podravinje is largely covered with young Middle and Upper Pliocene sediments consisting of clays, sands and pebbles. Only in the south do older Miocene strata pass into the area in question: Sarmatian, Miocene marine conglomerates, nuliporic and Lithuanian limestones, and Miocene marine marls and sandstones.
All these older Miocene strata are represented north of the Dravinja only in a narrow belt. They are heavily wrinkled, with Pliocene pebbles and sands stacked discordantly (inconsistently) on them. Extensive plains are filled with Pleistocene sediments and alluvium.
River marl
Marl is one of the sedimentary rocks that are formed in a suitable environment in the sea or, less frequently, in lakes. This is the source of the name "Marine". The name "Marine Marl" was introduced by A. Winkler (jhb. D. Geol. Reichsansfalt 1913), and was taken over by F. Heritsch (source: Geografski vestnik 1927; Maribor, Geomorphological conditions). The marl is usually dark gray but the marl at the Hussar's Jump is fully black. Such colors are mainly due to organic inclusions. Marl is formed when grains of clay, limestone or dolomite combine. Marl is a smooth substance, it is also used for building material. The clay in marl is of sedimentary origin, composed mainly of fine-grained minerals. Marl is easily chipped because it contains tiny particles of clay.
Marl sites in Slovenia
Questions
1. Look at the marl walls just before Kamnniški stream outflow into the river Drava. Are the walls completely black or do you find gray marl inclusions somewhere?
2. What do the inclusions look like (are they long shaped, vertical / horizontal or are they round / elliptical) and what is their size [cm]?
3. Water usually forms marl so that it is perfectly smooth. Is the marl on the walls also smooth? Describe why it is like that.
4. Find a piece of marl. Can you write with it like with charcoal? Is it hard or soft and which material gives it hardness or softness?
5. Take a photo of yourself or your personal item here. The photo must contain your GC name and the date of visit written on the paper or any other material.
Please send the answers to nisem.geocacher@gmail.com or via your GC profile before signing up for an Earth cache. You can write a find log online immediately afterwards without my reply. In case of incorrect answers I will contact you.
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