Kimmeridgian hardground-sequence boundary from the Mesozoic margin of the Holy Cross Mountains (central Poland): implications for the evolution of the northern Tethyan carbonate shelf

Late Jurassic facies succession of the Kleszczów Graben area (southern border of the Łódź Depression, peri-Tethyan shelf, central Poland)

“…Fa cies in ter pre ta tion: the F9 marls are deep-wa ter fa cies de pos ited in an outer-ramp set ting and rep re sent car bon ate ramp in un da tion. The sed i men tary en vi ron ment of hardground clasts with many gen er a tions of bor ings, en coun tered in the top part of suc ces sion F9, has al ready been stud ied in the Holy Cross Moun tains by Gruszczyński (1986) and Krajewski et al (2014Krajewski et al ( , 2017. The com po si tion of the bor ings may in di cate that col o ni za tion and recolonization of the clasts took place in a shal low-wa ter en vi ron ment.…”

“…Above, there is a char ac ter is tic marly ho ri zon (F9) in cluded by Wierzbowski (2017: pages 53-54 and 61) into the Kiełczygłów Marl Mem ber. In our opin ion, based upon the anal y sis of sed i men tary suc ces sion (also Barwicz-Piskorz, 1992) and its com par i son to the SW mar gin of the Holy Cross Mts., these marls rep re sent the so-called Low er most Marly Ho ri zon (Kutek, 1968(Kutek, , 1994Matyja, 2011;Krajewski et al, 2017). This isochronous marker ho ri zon is a key to strati graphic cor re la tion of Up per Ju ras sic de pos its in cen tral and south ern Po land (Kutek, 1968(Kutek, , 1994.…”

“…It can be traced in the SW mar gin of the Holy Cross Mts. (Kutek, 1968(Kutek, , 1994Krajewski et al, 2017), Łódź De pres sion (Barwicz-Piskorz, 1992, 1995Krajewski et al, 2014), Złoczew High (Krajewski et al, 2016), and Sulejów and Tomaszów Mazowiecki re gions (Kutek, 1994). In the top most part of the Low er most Marly Ho ri zon, close to the tran si tion into the over ly ing oolitic fa cies, there is ei ther a re gion ally dis trib uted hardground (Gruszczyński, 1986;Kaźmierczak and Pszczół kowski, 1968;Matyja, 2011;Krajewski et al, 2017) or bored and en crusted clasts de rived from the ero sion of the hardground (Chudzikiewicz and Wieczorek, 1985;Krajewski et al, 2014Krajewski et al, , 2017.…”

Sedimentary successions in the Middle–Upper Oxfordian reef deposits from the southern part of the Kraków–Częstochowa Upland (Southern Poland)

“…The Pol ish part of the car bon ate plat form is com monly classi fied as a car bon ate ramp (e.g., Kutek, 1994;Gutowski et al, 2005;Krajewski et al, 2011aKrajewski et al, , 2016 or an open shelf (e.g., Matyja et al, 1989). The main con trol ling fac tors of plat form evo lu tion were: (1) sea level changes, (2) synsedimentary tecton ics and (3) Pa leo zoic base ment el e va tions (e.g., Kutek, 1994;Matyszkiewicz, 1997;Gutowski et al, 2005;Matyszkiewicz et al, 2006aMatyszkiewicz et al, , b, 2012Barski and Mieszkowski, 2014;Krajewski et al, 2014Krajewski et al, , 2016Krajewski et al, , 2017Wierzbowski, 2017;WoŸniak et al, 2018). Par tic u larly im portant fac tors, which pe ri od i cally mod i fied the sea-bot tom morphol ogy and the palaeoenvironmental con di tions, were extensional tec tonic move ments (Kutek, 1994;Matyszkiewicz, 1997;Krajewski et al, 2016;.…”

“…1A and B). The synsedimentary tec ton ics, re lated to re juve na tion of Pa leo zoic struc tures (e.g., ¯aba, 1999), caused peri odic breakup of the car bon ate plat form into many smaller, fault-con trolled intra-plat form ridges and bas ins (e.g., Matyszkiewicz et al, 2006aMatyszkiewicz et al, , 2012Krajewski et al, 2016Krajewski et al, , 2017. These ridges and bas ins, lo cated at the con tact of the Up per Silesian and Ma³opolska ter ranes, may have re sulted from NE-trending progradation of the rift ing pro cess from the south ern ar eas towards the north ern Tethys shelf.…”