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Toarcian, Aalenian and Early Bajocian (Jurassic)

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Toarcian, Aalenian and Early Bajocian (Jurassic) S T U D I A G E O L O G I C A P O L O N I C A Vol. 123, Kraków 2004, pp. 7–131. Geology of the Pieniny Klippen Belt and the Tatra Mts, Carpathians Edited by K. Birkenmajer Part XVII Ryszard MYCZYÑSKI 1 Toarcian, Aalenian and Early Bajocian (Jurassic) ammonite faunas and biostratigraphy in the Pieniny Klippen Belt and the Tatra Mts, West Carpathians2 (Figs 1–39; Tabs 1–5) Abstract. The ammonite faunas here described were derived from the Toarcian (Lower Jurassic) and Lower Bajocian (Middle Jurassic) strata of the Pieniny Klippen Belt and the Lower Subtatric Succession, Polish Tatra Mts (West Carpathians). The ammonites belong to the families: Phyllo- ceratidae, Lytoceratidae, Hildoceratidae, Graphoceratidae, Hammatoceratidae, Sonniniidae, Otoiti- dae and Stephanoceratidae. The associated bivalve faunule is represented by the families Inocera- midae and ?Posidoniidae. Stratigraphic evaluation of the ammonite assemblages helped to redefine age ranges of some lithostratigraphic units in the Pieniny Klippen Belt and the Lower Subtatric Succession, Tatra Mts. Key words: Pieniny Klippen Belt, Tatra Mts, biostratigraphy, Early-Middle Jurassic, ammonites, bivalves. INTRODUCTION The paper presents systematic description and stratigraphic evaluation of new Toarcian through Early Bajocian ammonite and bivalve faunas from the Pieniny Klippen Belt, Polish part (Figs 1, 2), and the Lower Subtatric Nappe, Polish Tatra Mts (Fig. 8), West Carpathians. The specimens elaborated are housed in the Insti- tute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa. 1 Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, 00-818 Warszawa, Poland. E-mail: [email protected] 2 Manuscript accepted for publication July 15, 2004. 8 R. MYCZYÑSKI Collections: Ba – Brzeziny II: site 39 (Podskalnia Shale Mbr), coll. R. Myczyñski Br – Brzeziny I: site 38d (Podskalnia Shale Mbr), coll. R. Myczyñski Brb – Brzeziny I: site 38b (Skalnite Marlstone Mbr), coll. R. Myczyñski Brt – Brzeziny I: site 38b (Skalnite Marlstone Mbr), coll. R. Myczyñski CS – site 8 (Krempachy Marl Fm.), coll. R. Myczyñski Cz – Czorsztyn Castle (Skrzypny Shale Fm; loc.: see Birkenmajer, 1963a), coll. L. Watycha Czor. – site 33 (Krempachy Marl Fm.), coll. R. Myczyñski D – site 21 (Krempachy Marl Fm.), coll. R. Myczyñski FiP – site 36 (So³tysia Marlstone Fm.), coll. R. Myczyñski G, GAc – sites 12, 13 (Podzamcze Limstone Fm.), coll. R. Myczyñski HW – site Czorsztyn Castle (Skrzypny Shale Fm.), coll. H. Wierzbowski K – site 31 (Krempachy Marl Fm.), coll. R. Myczyñski KB – sites 21; 23–26; W of Hedeki Wierch (Krempachy Marl Fm., Skrzypny Shale Fm.), coll. K. Birkenmajer Kob – site 38a (Koby³a Limestone Mbr), coll. R. Myczyñski Kp – sites 14–17 (Skrzypny Shale Fm.), coll. R. Myczyñski KrP – site 30 (Skrzypny Shale Fm.), coll. R. Myczyñski KSB – site 23 (Skrzypny Shale Fm.), coll. R. Myczyñski LW – Czorsztyn Castle (Krempachy Marl Fm.; loc.: see Birkenmajer, 1963a), coll. L. Watycha Mc – sites 2–11 (Homole Gorge area: Krempachy Marl Fm., Skrzypny Shale Fm., Harcygrund Shale Fm., Podzamcze Limestone Fm.), coll. R. Myczyñski N – site 28 (Skrzypny Shale Fm.), coll. R. Myczyñski SB – site 23 (Skrzypny Shale Fm.), coll. R. Myczyñski SKA – site Pieniñski Stream (Pliensbachian limestones; loc.: Horwitz, 1937; Birkenmajer & Myczyñski, 1994), coll. R. Myczyñski WS – site 22 (Podzamcze Limestone Fm. – after K. Birkenmajer, personal information, 2004), coll. R. Myczyñski ZA – site 33 (Krempachy Marl Fm.), coll. R. Myczyñski ZN – site 25 (Skrzypny Shale Fm.), coll. R. Myczyñski. PIENINY KLIPPEN BELT: LITHOSTRATIGRAPHIC UNITS SAMPLED In the Pieniny Klippen Belt of Poland, new ammonite and bivalve faunas have been collected from the Toarcian through Lower Bajocian deposits belonging mainly to the Czorsztyn-, Niedzica- and Czertezik successions, partly also to the Branisko and the Pieniny successions (sensu Birkenmajer, 1977). Their location in the field is shown in Figs 1 and 2. The following lithostratigraphic units were sampled: (1) the Krempachy Marl Formation; (2) the Skrzypny Shale Formation; (3) the Harcygrund Shale Forma- tion; (4) the Podzamcze Limestone Formation (for formal description of these units – see Birkenmajer, 1977). Stratigraphic evaluation of the ammonite and bivalve faunas described in this paper (see below), have allowed to revise stratigraphic boundaries of the above units. Remark: Palaeontological determination and stratigraphic evaluation of an am- monite fauna from the Upper Pliensbachian “spotty limestone” (informal unit) of the Pieniny Succession (see Birkenmajer, 1977), including a revision of that col- AMMONITE FAUNAS AND BIOSTRATIGRAPHY 9 Latvia CRACOW A F O R E D E B a l t i c S e a Lithuania E P N D RS L A R E CARPAT F O ER HIA sia T NS us U L A N lor O P O D ye BORISLAV G e r m a n y B WARSAW B Czech AR CRACOW Ukraine R C PAT Republic A E HI k N AN va blic IN S Slo epu BRATISLAVA Austria R Hungary Italy Romania 0 100 km BUDAPEST D NOWY TARG u n B Dun a 0 5 10 km aje je 33 c 23 c 32 29 -26 35 -30 14 21 CZORSZTYN 22 -17 1a-c ZASKALE SZCZAWNICA NIEDZICA ROGONIK KREMPACHY FALSZTYN CASTLE JAWORKI SOBCZAÑSKI SZAFLARY GORGE Y E 34 N ka L 31 I an O c N pi M e u m O BIA£A j EE Kr ea na tr H WODA u ka I S D a³ 27 ³y Bi P ia B -28 10 4-5 18-20 2-3 9, 11 6-8 - 1 - 2 - 3 - 4 31 - 5 RS - 6 Fig. 1. A. Location of the Pieniny Klippen Belt (in black) within the Carpathians (adapted from Birkenmajer, 1963a, 1977); box – area shown in fig. 1B. B. Faunal site location in the Pieniny Klippe Belt; 1 – Magura Nappe (Palaeogene flysch); 2 – Podhale Palaeogene (Palaeogene flysch); 3 – Pieniny Klippen Belt; 4 – northern and southern tectonic boundaries of the Pieniny Klippen Belt; 5 – faunal sites 1–35 (as described in the text); 6 – Republic of Russia lected and determined by Horwitz (1937), has been published by Birkenmajer and Myczyñski (1994). (1) Krempachy Marl Formation This formal lithostratigraphic unit includes spotty, grey, grey-bluish marls and marly-shaly limestones which occur mainly in the Czorsztyn-, Czertezik-, Nie- dzica- and the Branisko successions (Birkenmajer, 1977, 1979). Previously, this unit was being described under the name of the “Opalinum marls”, mainly from the Czorsztyn Succession (see Birkenmajer, 1958, 1963a, b, 1970a, 1977). In the Czorsztyn Succession (northernmost unit of the Pieniny Klippen Belt ba- sin), the rocks are light-grey, becoming darker-coloured in the more southern ones – the Czertezik – through the Branisko successions. They show numerous traces of bioturbation (e.g., Tyszka, 1991). Crinoid-filament-spiculite miocrofacies pre- dominates in the marly limestones. Based on stratigraphic evaluation of previously published faunas, Birkenmajer (1963a, b, 1977) proposed a Late Pliensbachian (Domerian) through lowest Late 10 R. MYCZYÑSKI y tar S a k d ok Grajc to o Pot are o W k P a rn a Cierchliska z P JAW O R K I C o k a to k o £ê G t k g r o o na i aj P t bi ca 14 u re o z z e k P an R o Ubocz 15 C m i to £a ³k a k o³tys 16 ka w B B I A £ A S ia S rio ia ka³a sa ³a ia S Pi W O D A tok Sztoln W Po 17 W o d ¹ a 1a w ó z 1b H 1c olegow o Sm a Krupianka m a G a r b P k o o n l ia e to p C k ru z k K S a S to k ja k o a P Czerwona k a ³ l a o s Ska³a w k P i a o t ski o ow k oni 8 Konio- K K k 9 a o lakow m wiec t etry sk o P a io 7 S P ka³a n z S k c 4 a ze 6 pan 10 11 18 ówka 19 3 20 G a 5 c 12 ó ka w 2 ws k ³o a aw ³a Polana P ka rœ S Cy la 13 Kiczery Durbaszka Polana S tach Pod Wysok¹ ur ów 0 1 km S L O V A K R E P U B L I C ka Fig. 2. Faunal sites 1–20 (see the text) in the Pieniny Klippen Belt between Bia³a Woda and Jaworki (base map adapted from Birkenmajer, 1970a, fig. 2) Aalenian age for the Krempachy Marl Formation. The best documented ammonite zones were: the Pleydellia aalensis Subzone (Late Toarcian); the Leioceras opalinum Zone and the Tmetoceras scissum Zone (Early Aalenian). (2) Skrzypny Shale Formation This formal lithostratigraphic unit includes black and dark-grey/bluish shales with spherosiderite (sideroplesite – see Birkenmajer & Narêbski, 1958) concre- tions. The unit occurs in most stratigraphic successions of the Pieniny Klippen Belt basin, from the Czorsztyn Succession in north, through the Pieniny Succession in the south (see Birkenmajer, 1977). Previously, this lithostratigraphic unit was known under the name of the “Murchisonae shales” (see Birkenmajer, 1958, 1963a, b, 1977). Based on stratigraphic evaluation of previously published faunas from the Czorsztyn Succession, a Late Aalenian through Middle Bajocian age was accepted (Birkenmajer, 1963a, b, 1977). The best documented ammonite zones were: the AMMONITE FAUNAS AND BIOSTRATIGRAPHY 11 Ludwigia murchisonae and the Graphoceras concavum zones (Late Aalenian); and the Sonninia sowerbyi and the Otoites sauzei zones (lower and middle zones of Middle Bajocian – see Birkenmajer, 1963a, b, 1977). (3) Harcygrund Shale Formation This formal lithostratigraphic unit occurs mainly in the basinal Branisko and Pi- eniny successions, moreover in the basinal Magura Succession (Grajcarek Unit) of the Pieniny Klippen Belt (Birkenmajer, 1977).
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