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Nõlvak, 1980a

Nõlvak, J. 1980. Chitinozoans in biostratigraphy of the northern East Baltic Ashgillian. A preliminary report. Acta Palaeontologica Polonica 25 (2), 253-260. PDF | DETAILS

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ID490
ReferenceNõlvak, 1980a
AuthorNõlvak, J.
Year1980
TitleChitinozoans in biostratigraphy of the northern East Baltic Ashgillian. A preliminary report
JournalActa Palaeontologica Polonica
Volume25
Number2
pgs.253-260
Source typearticle in journal
LanguageEnglish
Remarks2 fototahvlit
URLhttps://www.app.pan.pl/archive/published/app25/app25-253.pdf
Abstract

Acid-resistant microfossils have been studied from serial bore-core samples representing different facies of Ashgillian deposits. Chitinozoans are shown to hold better promise for detailed subdivision and section correlation than other scarce representatives of macro- or microfauna. According to their vertical distribution, three types of chitinozoan species having biostratigraphic significance can be distinguished.


Sections studied or mentioned

Localitypgs.Figs.Remarks
Eikla 508 borehole2552
Hullo 385 borehole2552
Orjaku borehole2552
Ruhnu 500 borehole2552

Photos

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<i><i>Acanthochitina barbata</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-1) <i><i>Acanthochitina barbata</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-1) <i><i>Acanthochitina barbata</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-1) <i><i>Acanthochitina barbata</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-1) <i><i>Acanthochitina barbata</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-1) <i><i>Chitinozoa</i> | Conochitina cf. elegans Eisenack, 1931</i><br />Hullo 385 borehole, 25.50 m, Vormsi Stage (306-12) <i><i>Chitinozoa</i> | Conochitina cf. elegans Eisenack, 1931</i><br />Hullo 385 borehole, 25.50 m, Vormsi Stage (306-12) <i><i>Chitinozoa</i> | Conochitina cf. elegans Eisenack, 1931</i><br />Hullo 385 borehole, 25.50 m, Vormsi Stage (306-12) <i><i>Belonechitina micracantha</i> | Conochitina micracantha Eisenack, 1931</i><br />Hullo 385 borehole, 35.50 m, Nabala Stage (306-6) <i><i>Belonechitina micracantha</i> | Conochitina micracantha Eisenack, 1931</i><br />Hullo 385 borehole, 35.50 m, Nabala Stage (306-6) <i><i>Belonechitina micracantha</i> | Conochitina micracantha Eisenack, 1931</i><br />Hullo 385 borehole, 35.50 m, Nabala Stage (306-6) <i><i>Conochitina minnesotensis</i></i><br />Hullo 385 borehole, 47.50 m, Rakvere Stage (306-11) <i><i>Conochitina minnesotensis</i></i><br />Hullo 385 borehole, 47.50 m, Rakvere Stage (306-11) <i><i>Conochitina minnesotensis</i></i><br />Hullo 385 borehole, 47.50 m, Rakvere Stage (306-11) <i><i>Conochitina rugata</i></i><br />Hagudi borehole, 24.30 m, Pirgu Stage (306-4) <i><i>Spinachitina taugourdeaui</i> | Conochitina taugourdeaui Eisenack, 1968</i><br />Undva 580 borehole, 152.40 m, Porkuni Stage (306-14) <i><i>Spinachitina taugourdeaui</i> | Conochitina taugourdeaui Eisenack, 1968</i><br />Undva 580 borehole, 152.40 m, Porkuni Stage (306-14) <i><i>Spinachitina taugourdeaui</i> | Conochitina taugourdeaui Eisenack, 1968</i><br />Undva 580 borehole, 152.40 m, Porkuni Stage (306-14) <i><i>Spinachitina taugourdeaui</i> | Conochitina taugourdeaui Eisenack, 1968</i><br />Undva 580 borehole, 152.40 m, Porkuni Stage (306-14) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Spinachitina coronata</i> | Coronochitina coronata Eisenack, 1931</i><br />Hagudi borehole, 35.50 m, Pirgu Stage (306-9) <i><i>Cyathochitina campanulaeformis</i></i><br />Eikla 508 borehole, 275.50 m, Nabala Stage (306-8) <i><i>Chitinozoa</i> | Cyathochitina cf. dispar Benoit et Taugourdeau,1961</i><br />Eikla 508 borehole, 289.50 m, Nabala Stage (306-2) <i><i>Chitinozoa</i> | Cyathochitina cf. dispar Benoit et Taugourdeau,1961</i><br />Eikla 508 borehole, 289.50 m, Nabala Stage (306-2) <i><i>Chitinozoa</i> | Cyathochitina cf. dispar Benoit et Taugourdeau,1961</i><br />Eikla 508 borehole, 289.50 m, Nabala Stage (306-2) <i><i>Cyathochitina kuckersiana</i></i><br />Hullo 385 borehole, 21.50 m, Vormsi Stage (306-7) <i><i>Desmochitina minor</i></i><br />Kaugatuma 509 borehole, 404.50 m, Nabala Stage (306-5) <i><i>Desmochitina minor</i></i><br />Kaugatuma 509 borehole, 404.50 m, Nabala Stage (306-5) <i><i>Lagenochitina baltica</i></i><br />Orjaku borehole, 96.60 m, Nabala Stage (306-13) <i><i>Lagenochitina prussica</i></i><br />Ruhnu 500 borehole, 631.70 m, Vormsi Stage (306-3) <i><i>Tanuchitina bergstroemi</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-10) <i><i>Tanuchitina bergstroemi</i></i><br />Hullo 385 borehole, 21.00 m, Vormsi Stage (306-10)