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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F08%3A00028038%21RIV10-MSM-14310___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Cave pearls are frequently found in disused adit leading bellow the Špilberk Hill in Brno (Czech Republic). Each pearl consists of (1) a core comprised of an extraneous rock fragment and (2) a body organized into light and dark calcite layers. The number of the main layers roughly corresponds to 30 years of the total adit age. The darker layers occasionally show a sub-structure consisting of 2-3 extremely fine layers of various gray tones. Dendrite-like structures were observed in some cases. Conditions, necessary for pearl formation, were recognized as follows: (1) percolating waters supersaturated with respect to calcite, (2) free rock fragments as a basis for calcite nucleation, and (3) turbulent water circulation in dripwater pools preventing the fragments to fix at pool bottom during calcite growth. Initial bigger irregular rock fragments (10-15 mm in diameter) lead to formation of pearls of irregular shape. Tiny fragments (1-3 mm in diameter) lead to near spherical pearls. Cave pearls are frequently found in disused adit leading bellow the Špilberk Hill in Brno (Czech Republic). Each pearl consists of (1) a core comprised of an extraneous rock fragment and (2) a body organized into light and dark calcite layers. The number of the main layers roughly corresponds to 30 years of the total adit age. The darker layers occasionally show a sub-structure consisting of 2-3 extremely fine layers of various gray tones. Dendrite-like structures were observed in some cases. Conditions, necessary for pearl formation, were recognized as follows: (1) percolating waters supersaturated with respect to calcite, (2) free rock fragments as a basis for calcite nucleation, and (3) turbulent water circulation in dripwater pools preventing the fragments to fix at pool bottom during calcite growth. Initial bigger irregular rock fragments (10-15 mm in diameter) lead to formation of pearls of irregular shape. Tiny fragments (1-3 mm in diameter) lead to near spherical pearls.
dcterms:title
%22Cave pearls%22 as a by-product of building constructions %22Cave pearls%22 as a by-product of building constructions
skos:prefLabel
%22Cave pearls%22 as a by-product of building constructions %22Cave pearls%22 as a by-product of building constructions
skos:notation
RIV/00216224:14310/08:00028038!RIV10-MSM-14310___
n3:aktivita
n17:S n17:P n17:Z
n3:aktivity
P(GA205/03/1128), S, Z(MSM0021622412)
n3:cisloPeriodika
1
n3:dodaniDat
n10:2010
n3:domaciTvurceVysledku
n7:1131664 n7:6258050 n7:6717373 n7:2885476 n7:3963314
n3:druhVysledku
n18:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
358955
n3:idVysledku
RIV/00216224:14310/08:00028038
n3:jazykVysledku
n13:eng
n3:klicovaSlova
adit; calcite; concrete; dripwater pool; percolating water; growth; microstructure; pearl; rock fragment
n3:klicoveSlovo
n6:adit n6:rock%20fragment n6:growth n6:percolating%20water n6:dripwater%20pool n6:concrete n6:calcite n6:microstructure n6:pearl
n3:kodStatuVydavatele
SK - Slovenská republika
n3:kontrolniKodProRIV
[0DED9433BDC9]
n3:nazevZdroje
Slovenský kras (Acta Carsologica Slovaca)
n3:obor
n12:DD
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n11:GA205%2F03%2F1128
n3:rokUplatneniVysledku
n10:2008
n3:svazekPeriodika
46
n3:tvurceVysledku
Buřival, Zbyněk Štelcl, Jindřich Faimon, Jiří Vávra, Václav Schwarzová, Monika
n3:zamer
n14:MSM0021622412
s:issn
0560-3137
s:numberOfPages
3
n9:organizacniJednotka
14310