Fig. 5 Microfacies. a in The Lower Cretaceous Tirgan Formation In The Gelian Section (Kopet Dagh, North Iran): Microfacies, Microfossils, And Their Biostratigraphic Significance

Fig. 5 Microfacies. a Fenestral mudstone with small benthic foraminifera, rare fragments of gastropods and worm tubes, and very rare dasycladaleans; sample G21. b Wackestone with ooids, intraclasts and bioclasts; the matrix is a siltic carbonate containing rare siltic to small arenitic quartz; sample G13A. c Bioclastic packstone with Balkhania balkhanica, fragments of molluscs, rare fragments of echinoderms, and rare ooids, foraminifera and calcareous algae; sample G18C. d Wackestone with fragments of molluscs, echinoderms and bryozoans, rare nodosariid framinifera, orbitolinids (Pa= Paleodictyonus actinostoma) and dasycladaleans; sample G44B. e Bioclastic packstone with fragments of molluscs, echinoderms and bryozoans, foraminifera (Balkhania balkhanica) and calcareous algae; sample G16A. f Bioclastic packstone with orbitolinids, lenticulinids, fragments of molluscs, worm tubes, echinoderm, bryozoans, and calcareous algae; sample G45. g Wackestone, partly dolomitized, with orbitolinids, fragments of bivalves, echinoderms and bryozoans, dasycladaleans (Nc=Neomeris cf. cretacea) and small fragments of udoteacens; sample G34. h-j Ooidic grainstone, containing ooidic laminae with variable granulometry; frequently, the ooid nuclei are made of bioclasts (foraminifera or bivalve fragments); orbitolinids, as well as mollusc, echinoderm and bryozoan fragments are present; h – sample G40; i – sample G41; j – sample G43. Scale bar is 1 mm.