Rocks along the Ra;astreamThe Moravče valley is part of the Moravčesyncline, which belongs to thePosavje folds.It extends to Moravče and is filledwith Tertiary sediments.These are predominantly Miocenemarlaceous clays, sands and sandstones.The layers under the rock consistmostly of the Upper Triassic andEarly Jurassic limestones, dolomizedlimestones and dolomites, which canbe followed on the syncline’s wings.Further towards the west, the carbonaterock is bare on the steep banksin the gorge below Krašce, on thekarst rise with the little Church ofsv. Andrej, and on the karstified edgebelow Vrhpolje. This type of rock canbe followed above the left bank of theRača stream and further towardsKatarija, Cicelj and Trojica. Towardsthe north it continues towards Doleand Prikrnica. In the west, the streamcut its bed into the erosive patches ofthe Late Cretaceous flysch and rudistlimestones. The Rača leaves the valleyon thick alluvial deposits of the Quaternaryclay, gravel, sand, and silt.The oldest rocks along our naturetrail are Late Triassic and Early Jurassiclimestones, which were formedon the extensive submarine plain ofthe Tethys Sea some 210 million yearsago. From this shallow sea, groups ofislands eventually rose, with lagoonspredominating in the coastal zone.The climate was warm. The warmcoastal sea was inhabited by up to12Kamnine ob Ra;iMoravška dolina je del laške sinklinale,ki pripada Posavskim gubam.Sega do Moravč in je <strong>za</strong>polnjena s terciarnimisedimenti.To so večinoma miocenske lapornegline, peski in peščenjaki. Talninotvorijo zgornjetriasni in spodnjejurskiapnenci, dolomitizirani apnenci indolomiti, ki jih sledimo na krilih sinklinale.Dalje proti <strong>za</strong>hodu so karbonatnekamnine razgaljene na strmihbregovih v soteski pod Krašcami, nakraški vzpetini s cerkvico sv. Andrejain na <strong>za</strong>kraselem robu pod Vrhpoljem.Take kamnine sledimo nad levim bregomRače dalje proti Katariji, Cicljuin Trojici. Proti severu se nadaljujejoproti Dolam in Prikrnici. Na <strong>za</strong>hoduje Rača vre<strong>za</strong>la strugo v erozijske krpezgornjekrednih flišnih plasti in rudistnihapnencev. Dolino <strong>za</strong>pušča na debelihnanosih kvartarne gline, proda,peska in melja.Najstarejše kamnine na naši učni <strong>pot</strong>iso zgornjetriasni in spodnjejurski apnenci.Nastajali so na obsežni podmorskiravnici Tetidinega morja pred približno210 milijoni let. Iz plitvega morjaso se dvigale skupine otokov, v obalnempasu so prevladovale lagune.Podnebje je bilo toplo. V toplem priobalnemmorju so živele megalodontidneškoljke, velike tudi do 20 cm.V triasnih kamninah osamelega moravškegakrasa so to najznačilnejše okamnine.Zasledimo jih na <strong>za</strong>kraselih, delomaz mahom poraščenih kosih apnenca,ki jim pravimo tudi golice ali iz-13VEK\ERAKENOZOIK (Kz) –Novi Zemljin vek\CENOZOIC xxxxxxxxxxxxx xxxxxxMEZOZOIK (Mz) –Srednji Zemljin vek\MESOZOIC xxxxxxxxxxxxx xxxxxxPALEOZOIK (Pz) –Stari Zemljin vek\PALAEOZOIC xxxxxxxxxxxxx xxxxxxPREDKAMBRIJ\PRECAMBRIANPERIODA \PERIODKvartar (Q)\Quaternary xxxxxxxTerciar (Tc)\Tertiary xxxxxxKreda (K)\Cretaceous xxxxJura (J)\Jurassic xxxxTrias (T)\Triassic xxxxEPOHA \EPOCHZgornji\UpperSrednji\XxxxxSpodnji\XxxxxSTOPNJA \STAGEHolocen\HolocenePleistocen\PleistocenePliocen\PlioceneMiocen\MioceneOligocen\OligoceneEocen\EocenePaleocen\PalaeoceneZgornja\UpperSpodnja\XxxxxSpodnja\XxxxxSrednja\XxxxxSpodnja\Xxxxx Malm\XxxxxxDogger\XxxxxxLias\XxxxxxSTAROST\AGEmilijoni let \million years0.011.8651352022505404600Geolo[ka ;asovna lestvica.Geologic Timescale.Razgaljena apnen;evastena.A bare limestone wall.
1415PERIODA \PERIODKvartar (Q)\Quaternary xxxxxxxEPOHA \EPOCHHolocen\HoloceneLEGENDA\LEGENDSIMBOLI\SIMBOLSalOPIS LITOSTRATIGRAFSKIHENOT\XXXXXX XXXXXX XXXXXXXXXXXXXXXXXAluvij v splo[nem\Alluvium in generalTerciar (Tc)\Tertiary xxxxxxMiocen\MioceneM 1 2Pesek, melj, prod, glina, pe[;enjakz vlo/ki laporja\Sand, silt, gravel, clay, sandstonewith interbed of marlM 1Glina, pesek, melj, pe[;enjak inprod\Clay, sand, silt, sandstone andgravelKreda (K)\Cretaceous xxxxZgornja\UpperK 2Fli[> apnenec, lapor, pe[;enjak,bre;a\Flysch> limestone, marl,sandstone, brecciaK 2Rudistni apnenec\Rudist limestoneJura (J) in Trias (T)\Jurassic xxxx andTriassic xxxxLias in zgornji trias\Lias and UpperTriassicT, JApnenec\LimestoneGeolo[ka zgradba[ir[ega obmo;ja ob Ra;i.Geological structureof the wider area alongthe Ra;a stream.Prirejeno po Osnovni geolo[ki karti SFRJ, list Ljubljana, Zvezni geolo[ki<strong>za</strong>vod, Beograd, 1983, M 1 >100.000\Arranged by Geology of the sheet Ljubljana, Xxxxxxxxx xxxxxxxxxxxxxxxx, Beograd, 1983, M 1 >100.000Geolo[ki stolpec plasti ob Ra;i.Geologic column of beds of Ra;a.LEGENDA \LEGENDalM 1 2M 1K2K2T, JAluvij v splo[nem\Alluvium in generalPesek, melj, prod, glina, pe[;enjakz vlo/ki laporja\Sand, silt, gravel, clay, sandstonewith interbed of marlGlina, pesek, melj, pe[;enjak in prod\Clay, sand, silt, sandstone and gravelFli[> apnenec, lapor, pe[;enjak, bre;a\Flysch> limestone, marl, sandstone, brecciaRudistni apnenec\Rudist limestoneApnenec\Limestone25gGeolo[ke meje\Geologic boundariesVpad plasti\Dip of bedMikrof0sili\MicrofosilsOpu[;en glinokop\Abandoned clay pitPrelom\FaultKamnine ob u;ni <strong>pot</strong>i ob Ra;i.Rock along the Ra;a nature trail.danki. Najlaže jih najdemo, ko jepokrajina razgaljena, brez snega, grmovjein drevje pa brez listja. Značilnihsrčastih presekov megalodontodnihškoljk v svetlosivem apnencu skoraj nemoremo zgrešiti. Med okamninami najdemotudi polžke. Največkrat pa okamneloživljenje pona<strong>za</strong>rjajo le odlomkirazličnih lupin morskih mehkužcev.20 cm large megalodont bivalves.In the Triassic rock of the isolatedMoravče karst, these are the mostcharacteristic fossils. They can befound on karstified pieces of limestonepartially overgrown withmoss, especially when the countrysideis bare, without snow, and whentrees and bushes are leafless.We will find it almost impossible tooverlook the characteristic heartshapedcross-sections of megalodontbivalves in light grey limestone.Among the fossils, marine gastropodscan also be found, although most oftenthe petrified life is representedmerely by fragments of various shellsof marine molluscs.