Jurassic

Pieńkowski, Grzegorz; Schudack, Michael; Bosák, Pavel; Enay, Raymond; Feldman-Olszewska, Anna; Golonka, Jan; Gutowski, Jacek; Herngreen, G.F.W.; Jordan, Peter; Krobicki, Michał; Lathuilière, Bernard; Leinfelder, Reinhold; Michalı́k, Jozef; Monnig, Eckhard; Noe‐Nygaard, Nanna; Pálfy, József; Pint, Anna; Rasser, Michael W.; Reisdorf, Achim G.; Schmid, D. O.; Schweigert, Günter; Surlyk, Finn; Wetzel, Andreas; Wong, Th.E.

doi:10.1144/cev2p.2

Cited by 53 publications

(66 citation statements)

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“…In Mid dle Ju ras sic time, in tense tectonic ac tiv ity in the North Sea area led to the in ter nal dif fer en ti ation of the CEBS into a num ber of bas ins (Pieñkowski et al, 2008). The Pol ish Ba sin con sti tuted the east ern most arm of the CEBS, dis tant from the tec toni cally ac tive zone and sur rounded largely by lands (Fig.…”

Section: Palaeogeographical and Geological Backgroundmentioning

confidence: 99%

Storm-influenced deposition and cyclicity in a shallow-marine mudstone succession - example from the Middle Jurassic ore-bearing clays of the Polish Jura (southern Poland)

Leonowicz

2015

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1 Uni ver sity of War saw, In sti tute of Ge ol ogy, ¯wirki i Wigury 93, 02-089 Warszawa, Po land Leonowicz, P., 2015. Storm-in flu enced de po si tion and cyclicity in a shal low-ma rine mudstone suc ces sion -ex am ple from the Mid dle Ju ras sic ore-bear ing clays of the Pol ish Jura (south ern Po land). Geo log i cal Quar terly, 59 (2): 325-344, doi: 10.7306/gq.1221Sedimentological anal y sis of bioturbated mudstones from the Mid dle Ju ras sic ore-bear ing Czêstochowa Clay For ma tion has re vealed com mon rel ics of sed i men tary struc tures, such as thin silt/sand laminae, bed ding-plane ac cu mu la tions of shell debris, small and me dium silt-sand lenses, as well as silt-, sand-and shell-de bris-rich lev els, ac com pa nied by ero sion sur faces and mi nor scours. These fea tures doc u ment pe ri od i cal high-en ergy con di tions of mud de po si tion, in clud ing storm stir ring, event sed i men ta tion and the ac tiv ity of storm-gen er ated bot tom cur rents, which were re spon si ble for sea-floor ero sion and sed i ment sup ply from shal lower parts of the ba sin. The sea bot tom was prev a lently be low the storm wave base, but it rose above it dur ing ex cep tion ally strong storms and in the Early Bathonian zig zag chron when the ba sin ex pe ri enced con sid erable shallowing. The shal low est and high est en ergy con di tions oc curred in the late macrescens subchron, when the bot tom was close to, or above the fair-weather wave base. The es ti mated depth of the sea did not ex ceed sev eral tens of metres, but in some pe ri ods it could be even less than 20 m. Based on the ver ti cal vari a tion of the sand, silt and clay con tents, seven transgressive-re gres sive cy cles have been dis tin guished in the ap prox i mately 75 m thick suc ces sion span ning the Up per Bajocian-Up per Bathonian. Cy cles TR 1 , TR 2+3 , TR 5 and TR 6+7 cor re late with those dis tin guished in the co eval suc ces sion from cen tral Po land, al though the strati graphic po si tion of cy cle bound aries is slightly shifted. These cy cles re cord rel a tive sea level changes that af fected the en tire Pol ish Ba sin. Re gres sions R 2 and R 6 were smaller-scale-events, gen er ated in response to a lo cal tec tonic ac tiv ity and autocyclic shore line progradation.

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Section: Palaeogeographical and Geological Backgroundmentioning

confidence: 99%

Storm-influenced deposition and cyclicity in a shallow-marine mudstone succession - example from the Middle Jurassic ore-bearing clays of the Polish Jura (southern Poland)

Leonowicz

2015

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“…The ho ri zon from Kozłowice occurs in the low er most part of the Ciechocinek For ma tion succes sion, re cord ing the be gin ning of re gional trans gres sion pronounced in the en tire Pol ish Ba sin (depositional se quence VIII, parasequence VIIIb in Pieńkowski, 2004) as well as in other bas ins of the CEBS (cf. Hal lam, 1988Hal lam, , 2001Pieńkowski et al, 2008). The firmground from Częstochowa formed in the early morrisi chron, dur ing the early phase of trans gres sion marked in the en tire Pol ish Ba sin (T 5 in Silesian-Kraków re gion -Leonowicz, 2015, T6 in cen tral Po land - Pieńkowski et al, 2008: fig.…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Tubular tempestites from Jurassic mudstones of southern Poland

Leonowicz

2015

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Leonowicz, P., 2016. Tu bu lar tempestites from Ju ras sic mudstones of south ern Po land. Geo log i cal Quar terly, 60 (2): 385-394, doi: 10.7306/gq.1246 This pa per pres ents tu bu lar tempestites from south ern Po land and their ap pli ca tion for en vi ron men tal and se quence stra tigra phy in ter pre ta tion. Tu bu lar tempestites are pres ent in muddy suc ces sions of the Lower Ju ras sic Ciechocinek For ma tion and in the Mid dle Ju ras sic Częstochowa Ore-Bear ing Clay For ma tion in the Silesian-Kraków re gion. They oc cur as sand-filled tubes of Spongeliomorpha and Thalassinoides en trenched in the mudstone, which form two char ac ter is tic ho rizons. Tubes were emplaced in semi-con sol i dated sub strate and filled with sand brought by storm-gen er ated bot tom currents. The trace fos sils re veal fea tures typ i cal of Glossifungites ichnofacies as so ci ated firmgrounds, which re cord dis con ti nu ities in the strati graphi cal re cord, linked with a depositional hi a tus or con den sa tion and ero sion of the sea-floor. The co in ci dence of these ho ri zons with early phases of re gional trans gres sions sug gests that they rep re sent transgressive sur faces of ero sion. Their lim ited spa tial ex tent prob a bly re sulted from vary ing in ten sity of ero sion, which lo cally scoured deeply down to al ready con sol i dated sub strate, whereas in other places ero sion was weaker or even ab sent, and thus it is not marked in the sed i men tary re cord there.

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“…In the Silesian-Kraków region, sedimentation started in the Early Bajocian (sauzei chron-Kopik 1998) and lasted, with a short break in the subfurcatum chron, until the end of the Middle Jurassic, continuing farther during the Late Jurassic (Matyja and Wierzbowski 2006a). This transgression was not uniform but consisted of several transgressive pulses, interrupted by short-lived regressions and periods of stillstand (e.g., Matyja and Wierzbowski 2006a;Pieńkowski et al 2008). In the succession from central Poland, Pieńkowski et al (2008) distinguished eight transgressiveregressive (T-R) cycles.…”

Section: Geological Setting and Lithologymentioning

confidence: 99%

“…This transgression was not uniform but consisted of several transgressive pulses, interrupted by short-lived regressions and periods of stillstand (e.g., Matyja and Wierzbowski 2006a;Pieńkowski et al 2008). In the succession from central Poland, Pieńkowski et al (2008) distinguished eight transgressiveregressive (T-R) cycles. In the section exposed in the middle part of the Silesian-Kraków region, Leonowicz (2015) recognized seven T-R cycles, partly correlating with those from central Poland.…”

Section: Geological Setting and Lithologymentioning

confidence: 99%

“…In the section exposed in the middle part of the Silesian-Kraków region, Leonowicz (2015) recognized seven T-R cycles, partly correlating with those from central Poland. Besides the fluctuations of the shoreline, deposition in the Polish Basin was also influenced by morphological differentiation of the seafloor into several swells and depressions, resulting from salt movements and syndepositional faults (Dadlez 1994;Feldman-Olszewska 1997;Pieńkowski et al 2008). This differentiation is reflected by the lateral variability of thickness and facies type, which was recognized on a regional as well as local scale (Feldman-Olszewska 1997;Barski 1999).…”

Section: Geological Setting and Lithologymentioning

confidence: 99%

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