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- W4315695922 abstract "Three palynological zones and five subzones are recognised in the Makedonka, Krupen and Gurkovo Formations. They are defined by the first appearance of stratigraphically important (but sometimes rare) taxa, and on the high relative frequency of some genera and species: Torispora securis Zone (upper Makedonka Fonnation); Vestispora laevigata Zone (Krupen Fonnation); Thymospora spp. Zone (Gurkovo and Polyantsi Formations). The Thymospora spp. Zone includes two subzones separated by the appearance of the genera Candidispora, and of the species Spinosporites spinosus and S. exiguus. The initial analysis of the palynological data was based on the recognition of changes in distribution of four general morphological groups of palynomorph (Triletes spores, Monoletes spores and Monosaccates and Bisaccates pollen). Although none of these is in any way a natural group, they can largely be taken to represent at least in part the broad habitat-types within the coal swamps. The present study was limited to Bolsovian to early Westphalian D coals of the upper Makedonka and Krupen Fonnations, Dobrudzha Coalfield; and late Westphalian D and early Cantabrian coals of the Polyantsi and Gurkovo Formations, Dobrudzha Coalfield." @default.
- W4315695922 created "2023-01-12" @default.
- W4315695922 creator A5073261446 @default.
- W4315695922 date "2004-06-30" @default.
- W4315695922 modified "2023-10-01" @default.
- W4315695922 title "Microfloral biostratigraphy and vegetation change in the late Westphalian of the Dobrudzha Basin, NE Bulgaria" @default.
- W4315695922 doi "https://doi.org/10.52321/geolbalc.34.1-2.21" @default.
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