Research subject. Late Givetian-Early Frasnian brachiopods, conodonts and spores of higher plants from the Timan Horizon borehole No. 8 Tsarichankaya. Material methods. The biostratigraphical me thod was used to isolate fossils determine taxonomic compositions plant deposits drilled by Tsarichanskaya (interval 3637.00–3647.00 m), substantiate their age carry out a correlation. An improved techn...

Accurate hypotheses of primary homology are fundamental to many aspects of the systematics and palaeobiology of fossils. They are particularly critical for conodonts: virtually all areas of conodont research are underpinned by homology, yet the majority of conodont taxa are found only as disarticulated skeletal elements, and hypotheses of element homology are inferred from morphological compari...

This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts the southern Holy Cross Mountains in south-eastern Poland. It was a unique time interval characterised by significant change climate, tectonic, ocean chemistry. In early Ordovician, were located mid-latitude climatic zone at southwestern periphery Baltica; therefore, δ18Oapatite values this region pro...