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Bauert, G. et al., 2014

Bauert, G., Nõlvak, J. & Bauert, H. 2014. Chitinozoan biostratigraphy in the Haljala Regional Stage, Upper Ordovician: a high-resolution approach from NE Estonia. GFF 136 (1), 26-29. | DOI | DETAILS

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ID3573
ReferenceBauert, G. et al., 2014
AuthorBauert, G., Nõlvak, J. & Bauert, H.
Year2014
TitleChitinozoan biostratigraphy in the Haljala Regional Stage, Upper Ordovician: a high-resolution approach from NE Estonia
JournalGFF
Volume136
Number1
pgs.26-29
Source typearticle in journal
LanguageEnglish
DOI10.1080/11035897.2013.857715
AbstractThe distribution of chitinozoans in the Haljala Stage (Upper Ordovician, Sandbian) from Kerguta-565, Piilsi-729 and Vasknarva-639 drill cores in NE Estonia was examined from 128 closely spaced samples. The studied chitinozoan fauna was diverse – altogether 14 chitinozoan genera and 39 species were recorded. Based on chitinozoan ranges in the studied sections, 13 species were identified as biostratigraphically most valuable. The high-resolution sampling used in this study has allowed us to refine the stratigraphic usefulness and extent of distribution of several chitinozoan key species as well as elaborate internal biostratigraphy of the Haljala Stage.

Sections studied or mentioned

Localitypgs.Figs.Remarks
Kerguta 565 borehole271Key chitinozoans of Kukruse to Haljala stages
Piilsi 729 borehole271Key chitinozoans of Kukruse to Haljala stages
Vasknarva 639 borehole271Key chitinozoans of Kukruse to Haljala stages

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<i><i>Angochitina curvata</i></i><br />Piilsi 729 borehole, 117.75 m, Haljala Stage ( 664-1) <i><i>Angochitina multiplex</i></i><br />Piilsi 729 borehole, 103.14 m, Keila Stage ( 664-2) <i><i>Armoricochitina granulifera</i></i><br />Piilsi 729 borehole, 117.75 m, Haljala Stage ( 664-3) <i><i>Belonechitina hirsuta</i></i><br />Piilsi 729 borehole, 114.73 m, Haljala Stage ( 664-5) <i><i>Belonechitina jaanussonii</i></i><br />Piilsi 729 borehole, 116.65 m, Haljala Stage ( 664-6) <i><i>Calpichitina lata</i></i><br />Piilsi 729 borehole, 105.48 m, Haljala Stage ( 664-10) <i><i>Cyathochitina giraffa</i></i><br />Piilsi 729 borehole, 118.12 m, Haljala Stage ( 664-12) <i><i>Desmochitina juglandiformis</i></i><br />Piilsi 729 borehole, 107.13 m, Haljala Stage ( 664-8) <i><i>Desmochitina nodosa</i></i><br />Piilsi 729 borehole, 112.34 m, Haljala Stage ( 664-9) <i><i>Eisenackitina rhenana</i></i><br />Vasknarva 639 borehole, 86.94 m, Haljala Stage ( 664-11) <i><i>Chitinozoa</i> | Hercochitina aff. spinetum Melchin et Legault, 1985</i><br />Piilsi 729 borehole, 103.14 m, Haljala Stage ( 664-7) <i><i>Lagenochitina dalbyensis</i></i><br />Piilsi 729 borehole, 117.40 m, Haljala Stage ( 664-4) <i><i>Spinachitina cervicornis</i></i><br />Kerguta 565 borehole, 136.90 m, Haljala Stage ( 544-25) <i><i>Spinachitina cervicornis</i></i><br />Kerguta 565 borehole, 136.90 m, Haljala Stage ( 544-25)