The drowning of a carbonate platform: an example from the Devonian-Carboniferous of the southwestern Holy Cross Mountains, Poland

The Devonian/Carboniferous boundary in the Holy Cross Mountains (Poland)

“…2). On Frasnian amphiporoid lime stones, along a karst ero sional sur face, with a dis tinct an gu lar un conformity, oc cur Famennian ammonoid lime stones, from sev eral tens of centi metres to about 4 m thick, that are rich in ammonoids, cri noids, trilobites, cor als, bi valves, snails, brachi opods and fish re mains (Szulczewski, 1981;Szulczewski et al, 1996;Skompski and Szulczewski, 2000;Skompski et al, 2006).…”

“…The or i gin of these gaps is not linked with tec tonic events but with lo cal non-de po si tion in sub ma rine con di tions. The lim ited na ture of the strati graphic gaps is in di cated by the pres ence of de pos its from the miss ing in ter vals as well as ad mix tures of cono donts from the miss ing cono dont zones (Szulczewski, 1978(Szulczewski, , 1981Szulczewski et al, 1996).…”

“…The limestones and marls con tain goniatites, trilobites, cri noids, brachi opods and cor als (Osmólska, 1962;Szulczewski, 1981;Czarniecki, 1992;Szulczewski et al, 1996). In the Ostrówka Quarry, the de pos its are up to 3.5 m thick (Skompski, 1992;Szulczewski, 1995;Szulczewski and Skompski, 1995;Skompski et al, 2006).…”

“…Cono dont anal y sis indi cates that the old est de pos its of the Radlin Beds are from the sandbergi Zone and the youn gest -from the texanus Zone, i.e. they en com pass al most the en tire Tournaisian and the en tire low er most Visean (Szulczewski et al, 1996). ZARÊBY BEDS (ZB) This unit is de vel oped as black si li ceous claystones with radio lar ians and phos pho rus con cre tions (Culm fa cies), up to 25 m thick, that oc cur con form ably on the clayey-marly Radlin Beds (£ydka and ¯akowa, 1975;¯akowa and Migaszewski, 1995;Szulczewski et al, 1996).…”

“…ZARÊBY BEDS (ZB) This unit is de vel oped as black si li ceous claystones with radio lar ians and phos pho rus con cre tions (Culm fa cies), up to 25 m thick, that oc cur con form ably on the clayey-marly Radlin Beds (£ydka and ¯akowa, 1975;¯akowa and Migaszewski, 1995;Szulczewski et al, 1996). In the Ostrówka Quarry, the strati graphic po si tion of these de pos its is based on radio lar ians and points to the Lower-Mid dle Visean (¯akowa and Paszkowski, 1989); in the cono dont zonation their age ranges from the texanus to the bilineatus zones (Szulczewski et al, 1996). They rep re sent the deep est Car bon if er ous fa cies in the Ga³êzice area.…”