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Naleziste zkamenelin Houbuv lom / Fossil site Houba Quarry
Posted by: Groundspeak Regular Member Dáin & Olík
N 49° 54.859 E 014° 03.970
33U E 432956 N 5529521
Quick Description: CZ: Je povolen sber ze sute hledanim a pomoci geologickeho kladivka. Je zakazano kopat do skalni steny. - EN: At site is allowed to collect fossils by searching in scree and using prospecting hammer. It is forbidden to dig into quarry's rock wall.
Location: Středočeský kraj, Czechia
Date Posted: 3/14/2013 2:07:58 AM
Waymark Code: WMGJZD
Published By: Groundspeak Premium Member Neos2
Views: 72

Long Description:
Lokalita Houbuv lom

Houbuv lom je stary zruseny romanticky lom na jizni strane navrsi Zlateho kone, ktere je jednou z nejbohatsich svetovych paleontologickych lokalit ve spodnim devonu. Bylo zde popsano pres 500 druhu zivocichu. Devonske vrstvy tvori v jiznim okoli Koneprus rozsahlou plochou synklinalu, jejiz jadro s nejmladsimi vrstvami lezi prave v oblasti Zlateho kone. Severni ohraniceni synklinaly je tektonicke, podel tzv. ockovskeho presmyku byly na pevny masiv konepruskych a nadloznich vapencu nasunuty od severu starsi spodnodevonske a silurske vrstvy.

V Houbove lomu jsou odkryty polohy konepruskych vapencu a nadlozni suchomastske vapence. Konepruske vapence vznikaly v tropickem mori asi pred 400 miliony let. Vyznacuji se belavym zbarvenim a masivnim charakterem bez patrne vrstevnatosti. Na Zlatem koni tvori typicky utes, v nemz lze rozeznat dva hlavni geneticke typy vapencu – biogenni a biodetriticke. Biogenni vapence vznikly aktivni utesotvornou cinnosti prisedlych organismu, hlavne vapnitych ras, stromatopor, lilijic, koralu aj. Tyto vapence predstavuji vlastni jadro utesu. Do Houbova lomu zasahuji biogenni vapence jen prstovite, vlastni centrum utesu lezelo severneji a je vyborne odkryto ve vychodni stene tzv. Cisarskeho lomu na Zlatem koni. Biodetriticke vapence predstavuji jednak drt, ktera vznikla rozrusovanim utesu cinnosti vln i organismu, jednak nahromadene zbytky tech organismu, ktere v tesne blizkosti utesu a na jeho svazich nalezaly nejvhodnejsi zivotni podminky. Byli to zejmena ramenonozci, mechovky, korali, plzi aj. Tyto vapence vyplnovaly nerovnosti utesu a tvorily kolem pevneho jadra mohutne osypy, jejichz celkovy objem podstatne prevysuje podil vapencu biolitickych. Odkryvy techto vapencu s hojnymi fosiliemi se nachazeji na Zlatem koni v Houbove lomu. Konepruske vapence obsahuji velmi hojnou faunu, reprezentujici vetsinu zastupcu v te dobe zijicich zivocisnych skupin. K nejhojnejsim zkamenelinam patri lilijice, ramenonozci (popsano kolem 100 druhu), mechovky, korali, stromatopory, plzi (popsano pres 100 druhu), mlzi, mekkysi, trilobiti (popsano pres 50 druhu) aj. Fauna konepruskych vapencu mimo konepruskou oblast je pomerne chuda.
(www.otevrena-veda.cz)
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Fossil Site Houbuv Lom

Houbuv Lom (Houba Quarry) is old romantic abandoned quarry at the side of Zlaty kun (Golden Horse hill). It is one of the richest palaeontological sites from the Lower Devonian period in the world and more than 500 animal species have been recorded here. To the south of Koneprusy the Devonian layers form an extensive flat syncline, the core of which contain the youngest layers lie in the Zlatý kun area. The northern edge of this syncline is of tectonic origin and runs along the Ockov reverse slip-fault, where older Lower Devonian and Silurian limestones were thrust from the north to lay on top of the firm Koneprusy Massif and the overlaying limestones.

Positions of Koneprusy limestones and the overlying Suchomasty limestone are exposed in the Houba Quarry. Koneprusy limestone was formed in a tropical sea around 400 million years ago, and is characterized by its bleached white appearance and massive structure without apparent layering. At Zlaty kun this limestone forms a typical reef, in which we can recognize the two main genetic types of limestone – biogenic and biodetritic. Biogenic limestone was formed by active reef-building activity of static organisms especially calcareous algae seaweeds, stromatopores, sea-lilies, corals etc. These limestones represent the core of the reef. Biogenic limestones only reach into the Houbuv lom Quarry in a finger-like manner as the centre of the reef lay further to the north, where it is very clearly exposed in the eastern wall of the Cisarsky lom Quarry at Zlaty kun Hill. Biodetritic limestone is built of grit (detritus) which was broken away from the reef by wave action, and also of collections of the remains of animals which found their most suitable conditions on the slopes around the reef and died there. These were predominantly brachiopods, false corals, corals, gastropods etc. These limestones filled in the gaps in the reef and formed massive banks around the firm core of the reef. The total volume of this type is far greater than, the volume of “core” limestone. These limestone types with an abundance of fossils can be seen at the Houba Quarry on Zlaty kun Hill. The Koneprusy limestone is extremely rich in fossils with representatives of most of the animal groups which lived at that time. The most abundant fossils are the sea-lilies, brachiopods (around 100 species recorded), clams, molluscs, trilobites (more than 50 species recorded), false corals, corals, stromatopores etc. The fauna content of the Koneprusy limestone outside of the Koneprusy area is relatively poor.
(www.otevrena-veda.cz)
Fossils: yes

Gems: no

Meteorites: no

Minerals: no

Rock Types:
limestone


Admission price: 0.00 (listed in local currency)

Hours of Operation: Not listed

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