Fig. 3 in Ostracods and fore-reef sedimentology of the Frasnian-Famennian boundary beds in Kielce (Holy Cross Mountains, Poland)

Fig. 3. Upper Devonian (upper Frasnian to lower Famennian) calcareous beds of the Psie Górki section (Holy Cross Mountains, Poland). Microfacies. A. Microfacies 2b (or MF2b) consists of a fine−grained bioclastic and peloidal packstone. Abundant dasycladaceans algae (center of the picture), ostracods and foraminifers. Thin section PG7. B–D. Microfacies 4c (or MF4c) corresponds to a medium− to coarse grained crinoidal grainstone rich in subrounded microbreccias. The microbreccias are composed of algal mats with irregular thin fenestrae and a few peloids (center of D). The grains are well to poorly sorted and composed mainly of crinoids with few ostracods and molluscs. Micritized grains and peloids are present. Thin sections PG43 (B), PG39 (C) and PG35 (D). E. Microfacies 4a (or MF4a) consists of microconglomeratic floatstones with stromatoporoids fragments. The intraclasts are abundant and consist of subangular millimeter to centimeter−sized packstones and grainstones of microfacies 1 to 3. Thin section PG13. F. Microfacies 4b (or MF4b) is a coarse grainstone−rudstone with rare micritic oolites. The bioclasts are dominated by crinoids and brachiopods, rare dasycladaceans algae, ostracods and foraminifers. Intraclasts are present, and a few are encrusted by small tubular algae (Girvanella?). A small synsedimentary inverse fault is observed in the center of the picture. Graded bedding is present. The grainstone texture is episodically interrupted by thin stromatolitic mudstone laminae (white arrows). Thin section PG27. G, H. Foraminifers from Psie Górki: Eogeinitzina Lipina, 1950 (G) and Nanicella Henbest, 1935 (H). Thin section PG6. A,G, H, scale bars 250 µm; B–F, scale bars 1 cm.