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First Mesozoic Record of the Scleractinian Madrepora from the Maastrichtian Siliceous Limestones of Poland

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First Mesozoic Record of the Scleractinian Madrepora from the Maastrichtian Siliceous Limestones of Poland Facies (2006) DOI 10.1007/s10347-006-0089-6 ORIGINAL ARTICLE Jarosław Stolarski · Agostina Vertino First Mesozoic record of the scleractinian Madrepora from the Maastrichtian siliceous limestones of Poland Received: 11 July 2006 / Accepted: 11 September 2006 C Springer-Verlag 2006 Abstract The objective of the present article is to doc- Keywords Scleractinia . Madrepora . Cretaceous . ument the first stratigraphic occurrence of the colonial Maastrichtian . Siliceous limestone oculinid Madrepora, known from the modern seas as an azooxanthellate taxon that contributes to the formation of deep-water coral reefs. The Upper Cretaceous specimens of Introduction Madrepora sp. reported herein from Poland were recovered from Upper Maastrichtian (Nasiłow´ and Bochotnica local- The last few decades of exploration of Recent deep-water ities) and Lower Maastrichtian (Bliz˙ow´ locality) siliceous environments cast an entirely new light on the impor- limestones. The corals are preserved as imprints of the tance of scleractinian corals for the deep-water ecosys- branch fragments and molds of the calices. Despite their tems. Deep-water coral reefs (reef sensu Freiwald 1998; moldic preservation, the coral remains exhibit key generic Freiwald et al. 2004), whose framework is formed by scle- features of the genus Madrepora; including (1) sympodial ractinian taxa with arborescent growth forms, proved to be colony growth form with calices arranged in opposite and the regions of essential habitat, feeding grounds, recruit- alternating rows in one plane of the branch, and (2) imprints ment and nursery for a great deal of marine organisms. of the granular coenosteum texture, occasionally showing Deep-water coral reef ecosystems are currently a subject of peculiar reticulate patterns. Some features of the Creta- broad multidisciplinary studies (reviews by Freiwald et al. ceous Madrepora sp., such as the reticulate coenosteum 2004; Roberts et al. 2006). Among the current research top- texture, the range of the corallite diameter (2.8–4 mm), ics, traditional skeletal-based and molecular approaches, a and the arrangement of the septa in three regular cycles baseline for biodiversity assessments, are receiving con- resemble the skeletal features of the modern, typically con- siderable attention. The results of these studies show that structional, species M. oculata (type species). The lack in contrast to the tropical reefs, renowned for the sclerac- of any evidence of coral buildups and related debris in the tinian diversity, the Recent deep-water coral build-ups are whole Upper Cretaceous/Paleogene sequences from Poland generally formed by only 1 to 3 azooxanthellate sclerac- and the sparse occurrence of colony fragments, suggests tinian species. Globally, only six genera (and six species) that the Cretaceous Madrepora sp. formed small, isolated contribute significantly to the deep-water constructions: the colonies. traditional oculinids Madrepora oculata Linnaeus (1758), Oculina varicosa Lesueur (1821), the caryophyllids Lophe- J. Stolarski () lia pertusa (Linnaeus 1758), Goniocorella dumosa (Al- Instytut Paleobiologii PAN, cock 1902), Solenosmilia variabilis Duncan (1873), and Twarda 51/55, the dendrophylliid Enallopsammia profunda (de Pourtales` 00-818 Warszawa, Poland e-mail: [email protected] 1867). The evolutionary history of the Recent scleractinian taxa contributing to the formation of deep-water coral reefs A. Vertino is still poorly known. Until now, the earliest confirmed Dipartimento di Scienze Geologiche, University of Catania, records of these genera have been documented for the Corso Italia 55, 95129 Catania, Italy Cenozoic: (1) Madrepora sobral Filkorn (1994) from the Paleocene of Seymour Island, Antarctica (Filkorn 1994; A. Vertino Stolarski 1996); (2) Oculina becki (Nielsen 1922) from the Institut fuer Palaeontologie, University of Erlangen-Nuremberg, Paleocene of Denmark (Floris 1980; Bernecker and Wei- Loewenichstr. 28, 91054 Erlangen, Germany dlich 1990, 2005). The generic attribution of Campanian e-mail: [email protected] Oculina nordenskjoeldi (Felix 1909) from Antarctica is controversial, see Filkorn 1994;(3)Enallopsammia laddi Wells 1977 from the Late Eocene of Tonga; (4) Lophelia Maria di Leuca) and the second from silty deposits crop- defrancei (Milne Edwards and Haime 1857) from the Mid- ping out in southern Italy (Lazzaro, Reggio Calabria). dle Miocene of Sardinia (De Angelis d’Ossat and Neviani Institutional abbreviations PMC, Museum of Paleontol- 1897; see also the overview by Taviani et al. 2005). Two ogy, University of Catania (Universita` di Catania, Diparti- genera have been recognized only from modern seas: (5) mento di Scienze Geologiche); ZPAL, Institute of Paleobi- Goniocorella and (6) Solenosmilia. ology, Polish Academy of Sciences (Instytut Paleobiologii, The goal of this report is to document the earliest, Late PAN, Warszawa). Cretaceous occurrence of Madrepora (Madrepora sp.) that represents also the first colonial scleractinian described from Upper Cretaceous deposits of Poland. Amateur col- Geologic setting and palaeoenvironmental remarks lectors and paleontologists familiar with the Upper Cre- taceous deposits of Poland, interviewed by the senior au- Maastrichtian deposits in the Lublin Upland thor, acknowledged the possibility of overlooking colonial coral remnants that could be taken for common odd-shaped The studied samples with the colony fragments of sponge fragments. We hope that this paper will trigger Madrepora sp. are from the Maastrichtian deposits ex- recognition of dissolved Madrepora branches and more posed in three outcrops on the Lublin Upland: Nasiłow´ data about this potential construction-builder will become (1) and Bochotnica (2) located on the Vistula river banks available soon. (“Vistula section” further in the text), and (3) Bliz˙ow´ lo- cated in the central part of the Lublin Upland (Fig. 1). The Late Cretaceous succession in Lublin Upland is predom- Materials and methods inantly marly-calcareous, locally with siliciclastic input, and composed of siliceous limestones (local term: opoka), Fossil remains of the scleractinian corals are rare in the Up- marlstones, and marly limestones; white chalk appears in per Cretaceous deposits of Poland. From the Maastrichtian the eastern part of the region (Pozaryski˙ 1956; Krassowska deposits of the Lublin Upland, only scleractinians with 1997; Hakenberg and Swidrowska´ 2001). solitary growth forms were described and traditionally all The Maastrichtian in Poland is traditionally subdivided were classified into Caryophylliina ( = Turbinolidae in into four belemnite zones: Lower Maastrichtian Belem- Siemiradzki 1926). Most of the coral finds in siliceous nella lanceolata and Belemnella occidentalis zones and limestones (most common Upper Cretaceous facies in this Upper Maastrichtian Belemnitella junior and Belemnella region) are represented by poorly integrated molds or im- kazimiroviensis zones (Ciesli´ nski´ and Wyrwicka 1970; prints (as are most of the originally aragonite shells), al- Błaszkiewicz 1980; Abdel-Gawad 1986). According to a though body fossils with the original skeleton interpreted new basal Maastrichtian boundary definition (Odin and as neomorphically altered are also reported (Gautret et al. Laumerelle 2002), most of the B. lanceolata Zone should, 2000). however, be retained in the Campanian (e.g., Niebuhr 2003; The three colony fragments described in this paper are Walaszczyk 2004; see also Fig. 1B). The Lower Maas- represented by the imprints of branches and molds of trichtian may additionally be subdivided based on inoce- corallites. Typically, the surface of the cavities left by the ramids, as recently proposed by Walaszczyk et al. (2002). dissolved skeleton is coated by orange-brown ferrous ox- The tentative correlation of the inoceramid and belemnite ides (Figs. 2, 3). The branch fragments were collected at zonations is presented in Fig. 1 (see also Machalski 2005). three localities. The best preserved one (colony removed In the Vistula section, at the western margin of the Lublin from the rock in two parts ZPAL H.19/6/B139, and ZPAL Upland, the Maastrichtian (B. lanceolata Zone) starts with H.19/6/B140, respectively) is from the Late Maastrichtian opoka. The facies changes in the upper part of the B. occi- of Nasiłow´ (Fig. 1). It consists of ca. eight branches and dentalis zone. Somewhere at this level a more marly (with about 25 corallites (Figs. 2A, 3). The other two speci- chalk intercalations) succession appears, which ranges up mens examined in this study, the first from the Late Maas- to the base of the B. kazimiroviensis zone, where it turns trichtian of Bochotnica (ZPAL H.19/8/B160; Fig. 4), the again into siliceous limestone (Błaszkiewicz 1980). These second from the Early Maastrichtian of Bliz˙ow´ (ZPAL upper siliceous limestones crop out in two quarries of H.19/7/B144; Fig. 2B), consist of one and two branches, Nasiłow´ and Bochotnica, which yield the fragments of respectively, with five corallites preserved on each spec- Madrepora sp. described herein. The facies change from the imen. Attempts to cast some corallites with resin and to siliceous limestones to marls and chalk in the Vistula sec- dissolve the ambient rock, proved unsuccessful as many of tion may possibly be a record of a mid-Maastrichtian deep- the post-septal fissures are filled with the calcite cement ening of the basin. A shallowing trend is observed towards or marly sediment that prevent either resin penetration or the top of the Maastrichtian,
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