Simple methods for detection of microborings produced by coral-associated microendoliths

2019
journal article
article
5
cris.lastimport.wos2024-04-09T20:50:56Z
dc.abstract.enWell-preserved skeletons of Paleocene and Eocene scleractinians and octocorals (Polytremacis sp.) from Poland and Ukraine were studied to reveal microborings produced in vivo by coral-associated microendoliths. Microborings (mostly < 5 \mu m in diameter) are hardly visible, if at all, under a petrographic microscope. Their resin casts are obtained, however, through the epoxy vacuum cast-embedding technique and observed under a scanning electron microscope (SEM). Three-dimensional resin-filled (cast) microborings are also clearly visible under SEM in acid-etched petrographic thin-sections. Backscattered scanning electron microscopy imaging (BSE) is useful for visualization of the microborings during SEM study of both etched and non-etched thin-sections. A simple but very effective method to reveal the dense network of resin casts of microborings is observations of etched thin-sections under the petrographic microscope. Fluorescence microscopy (FL), especially with application of blue and green filters (Nikon’s B-1A and G-2A filter cubes), is recommended if etching thin-sections or polished samples is not possible. However, color contrast between the resin casts and the calcium carbonate of the coral skeleton was strong enough only in some examined thin-sections. The cathodoluminescence microscopy, the other method, does not require the etching of the thin-sections and is potentially useful for detection of microborings filled with calcite cement, although this technique was not applicable for the samples studied. Symbiotic coral-microendolith association (in broad meaning of the term symbiosis) is a common phenomenon in modern corals, but its fossil record is very sparse. This study shows that empty microborings can be common in fossil corals, allowing preparation of the resin casts. Some of the tested methods permit rapid detection of resin-filled microborings in thin-sections even by non-specialists, and selection of samples for SEM studies. Corals from claystones and mudstones, usually less affected by diagenesis, have higher taphonomic potential for preservation of empty microborings than corals from reef facies. The methods discussed here can be also applied for rapid detection of post-mortem microborings occurring in other substrates.pl
dc.affiliationWydział Geografii i Geologii : Instytut Nauk Geologicznychpl
dc.contributor.authorSalamon, Klaudiusz - 119100 pl
dc.contributor.authorKołodziej, Bogusław - 129014 pl
dc.contributor.authorStefanskyi, Vadim L.pl
dc.date.accessioned2019-03-19T11:23:29Z
dc.date.available2019-03-19T11:23:29Z
dc.date.issued2019pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number2pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume65pl
dc.identifier.articleid16pl
dc.identifier.doi10.1007/s10347-019-0560-9pl
dc.identifier.eissn1612-4820pl
dc.identifier.issn0172-9179pl
dc.identifier.projectROD UJ / OPpl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/70805
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeinne
dc.subject.enmicroendolithspl
dc.subject.encoralspl
dc.subject.enmicrobioerosionpl
dc.subject.enresin castspl
dc.subject.enmicroscope imagingpl
dc.subject.enfluorescence microscopepl
dc.subject.enPaleogenepl
dc.subject.enEocenepl
dc.subtypeArticlepl
dc.titleSimple methods for detection of microborings produced by coral-associated microendolithspl
dc.title.journalFaciespl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-09T20:50:56Z
dc.abstract.enpl
Well-preserved skeletons of Paleocene and Eocene scleractinians and octocorals (Polytremacis sp.) from Poland and Ukraine were studied to reveal microborings produced in vivo by coral-associated microendoliths. Microborings (mostly < 5 \mu m in diameter) are hardly visible, if at all, under a petrographic microscope. Their resin casts are obtained, however, through the epoxy vacuum cast-embedding technique and observed under a scanning electron microscope (SEM). Three-dimensional resin-filled (cast) microborings are also clearly visible under SEM in acid-etched petrographic thin-sections. Backscattered scanning electron microscopy imaging (BSE) is useful for visualization of the microborings during SEM study of both etched and non-etched thin-sections. A simple but very effective method to reveal the dense network of resin casts of microborings is observations of etched thin-sections under the petrographic microscope. Fluorescence microscopy (FL), especially with application of blue and green filters (Nikon’s B-1A and G-2A filter cubes), is recommended if etching thin-sections or polished samples is not possible. However, color contrast between the resin casts and the calcium carbonate of the coral skeleton was strong enough only in some examined thin-sections. The cathodoluminescence microscopy, the other method, does not require the etching of the thin-sections and is potentially useful for detection of microborings filled with calcite cement, although this technique was not applicable for the samples studied. Symbiotic coral-microendolith association (in broad meaning of the term symbiosis) is a common phenomenon in modern corals, but its fossil record is very sparse. This study shows that empty microborings can be common in fossil corals, allowing preparation of the resin casts. Some of the tested methods permit rapid detection of resin-filled microborings in thin-sections even by non-specialists, and selection of samples for SEM studies. Corals from claystones and mudstones, usually less affected by diagenesis, have higher taphonomic potential for preservation of empty microborings than corals from reef facies. The methods discussed here can be also applied for rapid detection of post-mortem microborings occurring in other substrates.
dc.affiliationpl
Wydział Geografii i Geologii : Instytut Nauk Geologicznych
dc.contributor.authorpl
Salamon, Klaudiusz - 119100
dc.contributor.authorpl
Kołodziej, Bogusław - 129014
dc.contributor.authorpl
Stefanskyi, Vadim L.
dc.date.accessioned
2019-03-19T11:23:29Z
dc.date.available
2019-03-19T11:23:29Z
dc.date.issuedpl
2019
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
2
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
65
dc.identifier.articleidpl
16
dc.identifier.doipl
10.1007/s10347-019-0560-9
dc.identifier.eissnpl
1612-4820
dc.identifier.issnpl
0172-9179
dc.identifier.projectpl
ROD UJ / OP
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/70805
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
inne
dc.subject.enpl
microendoliths
dc.subject.enpl
corals
dc.subject.enpl
microbioerosion
dc.subject.enpl
resin casts
dc.subject.enpl
microscope imaging
dc.subject.enpl
fluorescence microscope
dc.subject.enpl
Paleogene
dc.subject.enpl
Eocene
dc.subtypepl
Article
dc.titlepl
Simple methods for detection of microborings produced by coral-associated microendoliths
dc.title.journalpl
Facies
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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