Understanding the geological record of carbonate platform drowning across rifted Tethyan margins: Examples from the Lower Jurassic of the Apennines and Sicily (Italy)

Jurassic unconformities in the High-Tatric succession, Tatra Mountains, Poland

“…The re sult ing drown ing of a car bon ate plat form ef fected in a con sid er able in crease of ac com mo da tion space in re la tion to the amount of ac cu mu lat ing de pos its. This, in turn, led in the Callovian to the de vel op ment of the so-called drown ing un con formity (Ma rino and Santantonio, 2010;Godet, 2013), with such char ac ter is tic fea tures as an abrupt tran si tion from shal low-wa ter car bon ate de pos its into deep-wa ter clastics or car bon ates, and the oc cur rence of ferru ginous coats. In some places, breaks in de po si tion re sulted in con cen tra tion of ferruginous min er als in the bot tom part of the for ma tion, as is the case e.g., in Wielka Świstówka (Fig.…”

“…Nu mer ous re cords of drowned and iso lated car bon ate platforms are known i.a. from the South ern Alps (Winterer and Bossellini, 1981;Blendinger, 1984Blendinger, , 1986 or from the Apennines (Santantonio, 1993;Cozzi, 2000;Ma rino and Santantonio, 2010). These ex am ples of dis in te grated car bon ate plat forms, with their char ac ter is tic fa cies suc ces sions and ac com pa ny ing tec tonic struc tures, can be used as ref er ence points when analys ing a sim i lar his tory in dif fer ent re gions.…”

“…Some in sight into the pro cesses that took place dur ing the times cor respond ing to these gaps may come from anal y ses of these uncon formi ties. Geo met ri cal re la tions of the strata con tact ing along the un con formity, the out line and mor phol ogy of the uncon formity sur face it self, fa cies con trast of the un der ly ing and over ly ing de pos its, and the oc cur rence of ero sional forms and hardgrounds all shed light on the pro cesses that took place in the in ter val hid den in the gap (Clari et al, 1995;Ma rino and Santantonio, 2010). For ex am ple, it can be de duced if the stud -ied area was sub jected to emersion and ero sion in subaerial con di tions, to sub ma rine ero sion or faced non-de po si tion.…”

Geology and Jurassic paleogeography of the Mt. Primo-Mt. Castel Santa Maria ridge and neighbouring areas (Northern Apennines, Italy)

“…The Jurassic starts with the Calcare Massiccio Fm, a regional carbonate megabank, which was dismembered by late Hettangian-Sinemurian extension into structural highs and lows, having a different structural and stratigraphic evolution (Donatelli & Tramontana, 2014;Fabbi & Santantonio, 2012;Marino & Santantonio, 2010;Santantonio, 1994); for this reason the Calcare Massiccio Fm has been differentiated into three informal units ( Figure 5) following Cita et al (2007).…”

Carbonate-clastic sediments of the Dudziniec Formation in the Kościeliska Valley (High-Tatric series, Tatra Mountains, Poland): role of syndepositional tectonic activity in facies development during the Early and Middle Jurassic

“…The pre vail ing extensional re gime led to dis in te gra tion of Tri as sic car bon ate plat forms oc cu py ing the north ern shelf of the Tethys Ocean and to for ma tion of fault-bounded blocks, which were sub jected to up lift or sub si dence (Michalík, 1994;Wieczorek, 1995;Dumont et al, 1996;Santantonio and Carminati, 2011;Plašienka, 2012). Symp toms of Ju ras sic syndepositional tec tonic ac tiv ity are best known from the Alps (Winterer and Boselini, 1981;Blendinger, 1984Blendinger, , 1986Bertok et al, 2011) and the Apennines (Santantonio, 1993;Cozzi, 2000;Ma rino and Santantonio, 2010). Ju ras sic de pos its of the Tatra Moun tains also show much ev i dence of such ac tiv ity (Uchman, 1994;£uczyñski, 2001a, 2002Jach, 2007;Jezierska and £uczyñski, 2016).…”