Skip to Content

<

Cave Romana – Earthcache

A cache by Darkcurl Send Message to Owner Message this owner
Hidden : 07/16/2012
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: other (other)

Join now to view geocache location details. It's free!

Watch

How Geocaching Works

Please note Use of geocaching.com services is subject to the terms and conditions in our disclaimer.

Geocache Description:





Cave Romana
- Karstmarmorsteinbruch in Vinkuran


Als Karstmarmore werden Kalksteine aus dieser Region bezeichnet. Es handelt sich hierbei jedoch um Kalksteine und nicht um Marmor im petrografischen Sinne.

Vor etwa 100 Miollionen Jahren lagerten sich die Skelette von Korallen und Muschel am Meeresboden ab. Über Jahrmillionen können diese Kalksedimente die überwiegend aus Kalk (CaCO³) bestehen, eine beträchtliche Dicke erreichen. Der Druck der übereinanderliegenden Sedimente und des darüber liegenden Wassers führt zu deiner extremen Verdichtung und somit zu einer Umwandlung in Gestein. Dort, wo dieses Gestein unter besonders hohem Druck (durch Erdverschiebung) und extremen Temperaturen ausgesetzt wird, kristallisiert das Kalkgestein aus und zu echtem, kristallinem Marmor.

In Gebieten wie hier in der Karstregion, wo das Kalkgestein weniger tief verschoben wurde, weniger Druck und einer nicht so hohen Temperatur ausgesetzt war, blieb die Kristallisation aus. Dieser erdgeschichtlich jüngere Kalkstein ist ebenso polierfähig und wird daher als Karstmarmor bezeichnet. Er ist allerdings nicht so hart wie kristalliner Marmor.

Betrachtet man die Strukturen des Kalksteins der Cave Romana, sind dort verschiedene Typen festzustellen.
A. Biomikritische Kalksteine:
Hierbei handelt es sich um verfestigten Kalkschlamm der die Grundmasse des Gesteins durch ganz feiner Körner bildet. Aus bioklastischen (das bedeutet: überwiegend aus Trümmern von Organismenresten) Sedimenten mit vorherrschenden Trümmerstücken von fossilen Resten (Lamellibranchien, Rudisten, Bryozoen, Ostrakoden) gebildet. Das Gestein wirkt feinkörnig, fast homogen und erscheint meist als matte Masse.
-> der Handelsname: Vinkuran „UNITO“(einheitlich)
B: intraklastische Biomikritische Kalksteine:
Dieses Gestein unterscheidet sich von Typ A durch die Einschlüsse von kleineren und größeren Trümmer ehemaliger Korallenriffe. Hier sind Einzelfossilien in der sehr feinkörnigen Kalkmasse eingeschlossen. Eingelagert Fossilien sind erkennbar durch ihre dunkelbraune Farbe.
-> der Handelsname: Vinkuran „FIORITO“ („blumig“)




LOG-Aufgaben:
Bevor Du loggst beantworte bitte folgende Fragen per email:
1: Wenige Meter östlich der Listing-Koordinaten findest Du zwei große Aushöhlungen, wo Karstmarmor in Quadern aus dem Steinbruch ausgeschnitten wurde. Direkt vor diesen Aushöhlungen befinden sich Kalkstein-Quader, einer dieser ist mit einem blauen X gekennzeichnet. Untersuche seine Struktur und erkläre zu welchem Typus dieser zuzuordnen ist.

2: Wie viele Quader wurden in der rechten Aushöhlung ausgeschnitten?

3. Was denkst Du, welche Eigenschaften machen diesen Karstmarmor so attraktiv für Bildhauer und welcher Typus wird hier bevorzugt verwand?

4. Wie nennt man das Zeitalter in dem dieser Kalkstein entstanden ist?

Mache ein Foto (optional) von Dir und/oder Deinem GPS an der Schautafel an den Park-Koordinaten und füge es Deinem Log an



Cave Romana
- karst marble quarry in Vinkuran


Limestone from this region is as karst marbles known. However it is limestone and not marble, in petrographic sense. About 100 Million years ago, superimposed the skeletons of corals and shellfish the sea floor. Over millions of years, these carbonate sediments are predominantly of limestone (CaCO ³) consist, achieve a considerable thickness. The pressure of the overlying sediments and the overlying water leads to your extreme compression and thus a conversion rock. Where this rock is exposed to very high pressure (by earth shift) and extreme temperatures, the limestone crystallizes to real marble.
The crystallization remained out in areas such as here in the Karst region, where the limestone has been less deeply moved, was subjected to less pressure and a not so high temperature. This younger limestone is also polishing capable and is therefore considered Karst marble. He is however not so hard like crystalline marble.

If you look at the structures of the limestone of cave Romana, are there different types to determine. A. Biomicrit limestones: This is hardened lime mud which forms the basic dimensions of the rock through very fine grains. From bioclastic (this means: mainly from debris of organism residues) sediments with prevailing debris pieces of fossil remains (Lamellibranchien, Rudists, bryozoans, Ostracod) formed. The rock is fine-grained, almost homogeneous and appears mostly as a beamless mass. -> the trade name: Vinkuran "UNITO"(einheitlich)" B: intraclastic-biomicritic limestones: This Rock is different from type A with inclusions of smaller and larger debris of former coral reefs. Individual fossils are included here in the very fine grained calcareous mass. Embedded fossils are recognisable by their different color. -> the trade name: Vinkuran "FIORITO" ("flowery")



LOG tasks: Before you log answer following questions by email:
1: You will find a few metres east of the listing coordinates two major cavities where Karst marble was cut out in cuboids from the quarry. In front of these cavity are limestone blocke, one of these is marked with a blue X. Examine its structure and explain to what type it is.

2: How many cuboids were cut out of the right cavity?

3. What do think you which properties make this Karst marble so attractive for sculptors and which type is here preferred used?

4. How does one call the era in which this limestone is formed? A photo do you and/or your GPS on display at the Park coordinates (optional) and add it to your log


Cave Romana - Kras mramora kamenolom u Vinkuranu

Od rane povijesti poznati su krški vapnenački mramori iz ove regije iako vapnenac cije mramor u petrografskom smislu. Oko 100 miliona godina formirale su se naslage kostura koralja i školjkaša na morskom dnu. Tijekom milijuna godina karbonatni sedimenti, pretežno od vapnenca (CaCO ³) su formirani u znatnoj debljini naslaga. Pritisak gornjeg sedimenta i vode dovodi do vaše velike kompresije čime se formiraju stijene. Gdje je stijena izložena vrlo visokom tlaku i ekstremnim temperaturama vapnenac se kristalizira u mramoru. U područjima kao ovdje u krškom području, gdje je vapnenac je smješten pliće u odnosu na površinu, nije bio izložen tolikom tlaku, pa je ostao u procesu kristalizacije. Ovaj geološko mladi vapnenac je također pogodan za obradu i poliranje te je stoga nazivaju krškim mramorom. On nije tako težak kao kristalni mramor..

Gledajući strukturu vapnenca Cave Romana, postoje različite vrste. A. biomikritik vapnenci: To je očvrsnuo od vapnenca i tla, a osnovni sastav stijena je od vrlo sitnih zrnaca. Bioklasticnom (znači prije svega od ostataka organizama ostaje) formirane su naslage s dominantnim krhotinama komada fosilnih ostataka (Lamellibranchien, rudists, Mahovnjaci i ostrakodi). Stijena ima sitnozrno, gotovo homogena. -> Naziv proizvoda: Vinkuran "UNITO" (jedinstveni) B. Iintra-klastiči biomikritik vapnenci: Ovaj kamen je različit od tipa A i uključivanjem manjih i većih krhotina bivših koraljnih grebena. Ovdje su se pojedini fosili uvukli u samu strukturu sitnozrne vapnenačke materije. Fosili su prepoznatljivi po bojama. -> Naziv proizvoda: Vinkuran "FIORITO" ("cvjetne")


Prijaviti zadatke:
Kako bi prijavili posjetu ovom Earthcache-u prije logiranja odgovorite na slijedeća pitanja na email vlasnika cache-a:
1: Nekoliko metara istočno od koordinata listinga možete pronaći dvije velike šupljine, gdje je mramor izrezan u blokove. Neposredno ispred tih istražite kamene kocke vapnenca, od onih koji su označeni s plavom X. Istražite i objasnite njegovu strukturu i odgovorite koji je tip?
2 Koliko blokova je izrezano iz desne šupljine?
3: Što mislite, koje karakteristike čine ovaj mramor tako privlačnim za kipare i koji tip se najviše koristi u ovim krajevima?
4. Kako nazivamo doba u kojem vapnenac nastaje?
Priložite sliku (opcija) sebe i svog GPS-a pokraj tabele na koordinatama listinga pokraj parkirališta u log ovog Earthcache-a.


Thanks to HR_s00va for the translation into croatian language
Quellenverzeichnis/Bibliography/bibliografija: „PRIČA O KAMENOLOMU- Ex libro lapidum historia mundi“ by Korado Korlević, „Sedimentologija carbonata i evaporita“ by Josip Tisljar ; Wikipedia



free counters

Additional Hints (No hints available.)



 

Find...

436 Logged Visits

Found it 428     Didn't find it 3     Write note 4     Publish Listing 1     

View Logbook | View the Image Gallery of 342 images

**Warning! Spoilers may be included in the descriptions or links.

Current Time:
Last Updated:
Rendered From:Unknown
Coordinates are in the WGS84 datum

Return to the Top of the Page

Reviewer notes

Use this space to describe your geocache location, container, and how it's hidden to your reviewer. If you've made changes, tell the reviewer what changes you made. The more they know, the easier it is for them to publish your geocache. This note will not be visible to the public when your geocache is published.