LOYDELL, D. K., NESTOR, V. (2005) Integrated graptolite and chitinozoan biostratigraphy of the upper Telychian (Llandovery, Silurian) of the Ventspils D-3 core, Latvia. Geological Magazine, 142 (4) 369-376 doi:10.1017/s0016756805000531
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Integrated graptolite and chitinozoan biostratigraphy of the upper Telychian (Llandovery, Silurian) of the Ventspils D-3 core, Latvia | ||
| Journal | Geological Magazine | ||
| Authors | LOYDELL, D. K. | Author | |
| NESTOR, V. | Author | ||
| Year | 2005 (July) | Volume | 142 |
| Issue | 4 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756805000531Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 259723 | Long-form Identifier | mindat:1:5:259723:6 |
| GUID | 0 | ||
| Full Reference | LOYDELL, D. K., NESTOR, V. (2005) Integrated graptolite and chitinozoan biostratigraphy of the upper Telychian (Llandovery, Silurian) of the Ventspils D-3 core, Latvia. Geological Magazine, 142 (4) 369-376 doi:10.1017/s0016756805000531 | ||
| Plain Text | LOYDELL, D. K., NESTOR, V. (2005) Integrated graptolite and chitinozoan biostratigraphy of the upper Telychian (Llandovery, Silurian) of the Ventspils D-3 core, Latvia. Geological Magazine, 142 (4) 369-376 doi:10.1017/s0016756805000531 | ||
| In | (2005, July) Geological Magazine Vol. 142 (4) Cambridge University Press (CUP) | ||
| Abstract/Notes | Integrated graptolite and chitinozoan biostratigraphical data are presented from the upper Telychian (Oktavites spiralis and Cyrtograptus lapworthi graptolite biozones) of the Ventspils D-3 core, Latvia. The base of the Angochitina longicollis chitinozoan Biozone is approximately coincident with that of the spiralis graptolite Biozone, as it is elsewhere in the East Baltic, although in Wales it lies within the upper spiralis graptolite Biozone. Conochitina proboscifera appears in the upper spiralis graptolite Biozone in the Ventspils D-3 core, but at lower and higher horizons elsewhere, presumably reflecting its patchy distribution during the lower part of its stratigraphical range. Ramochitina ruhnuensis appears to be a stratigraphically useful, although geographically restricted, species, appearing at a level close to the base of the lapworthi graptolite Biozone. The most remarkable feature of the Ventspils D-3 chitinozoan record is the very early occurrence, in the upper spiralis graptolite Biozone, of two chitinozoan biozonal index species: Margachitina banwyensis and M. margaritana. Previously, these two taxa were considered unequivocal indicators of the uppermost Telychian to Sheinwoodian or Homerian, respectively. | ||
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