Porifera-microbialites of the Lower Liassic (Northern Calcareous ...

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34 Fig. 15. Two profiles of Triassic-Lower Liassic sequences from the Rot-Grau-Schnöll Quarry of Adnet. Semiquantitative abundances of sponges and foraminifera refer to studies of quarry walls and thin sections. Numbers of horizons correspond with samples in Figure 42 and thin sections on Plate 10. 4.9.2. Lienbacher Quarry (L) Geological Setting: � The Lienbacher Quarry (ÖK50 / Blatt 94 Hallein, R 07 3542, H 52 8425) is located northeast of the Tropf Quarry (Adnet reef core) and represents an upper slope position at the former Triassic reef body. In the northwestern corner of the quarry the transition between Triassic reef limestone and discordantly overlying Hettangian Schnöll Formation is just exposed (Fig. 16, Pl. 15), whereas the remaining part of the quarry is formed by several meters of Sinemurian red Adnet limestones.
Localities (Facies and Sponge Analyses) 35 � The Triassic-Jurassic boundary section exhibit a Triassic coral limestone, the top of which is affected by corrosion and partially covered by thin ferromanganese crusts. The onset of Jurassic sedimentation is shown by only a few centimeters of Schnöll limestone which is mostly covered by the Fe/Mn crust of the Schlotheimia marmorea zone. Sometimes both pinch out or are limited to the infill of larger cracks that penetrate the Triassic base up to about half a meter. Due to the findings of several ammonites, Böhm et al. (1999) were able to attribute the Schnöll limestones at Lienbacher Quarry to the Guggen Member, because the reef top here displays a hiatus in sedimentation that covers the period from about Lower to Middle Hettangian. � The small layer of Schnöll limestone at Lienbacher Quarry displays red biomicrites (wacke- to packstones) with debris of crinoids, formaminifers and ostracods. As a characteristic feature, the sediment encompasses a high ratio of corroded and ferromanganese impregnated clasts, which are predominantly formed by red biomicrites with shell debris and less frequently isolated hexactin sponge spicules. � Altogether sponge remains are rare, thus taken samples from the Liassic base (red limestones of the Schnöll Fm. and from Fe/Mn crusts) were primarily used for geochemical analyses (chapter 8.) � The Lienbacher section is described by Böhm (1992) and Böhm et al. (1999). Sponge Analyses: Fig. 16. Schematic sketch of a sawn quarry wall (about 5-6m high) in the northwestern part of Adnet/Lienbacher Quarry (see also Pl. 15A). sf: Schnöll Formation (Middle Hett., Guggen Member), m: marmorea crust (Mid.-Up. Hett.), sc: Basal Sinemurian Crust, dws: deep water stromatolites. Samples of Liassic limestones L 1-13 were taken from the top and from the infill of cracks of the Triassic reef limestone. � All noticed spicules are broken monaxons and hexactins of most likely dislocated, non-rigid hexactinellids. Sponges did not settle on the firmgrounds of the corroded reef body surface.
Page 1 and 2: Porifera-microbialites of the Lower
Page 3 and 4: Abstract In the aftermath of the Tr
Page 5 and 6: Zusammenfassung Nach dem Aussterbee
Page 7 and 8: Content 1. Introduction ...........
Page 9 and 10: Introduction 9 1. Introduction In U
Page 11 and 12: Geological Setting 11 2. Geological
Page 13 and 14: Geological Setting 13 Fig. 2. Locat
Page 15 and 16: Methods 15 3. Methods In the Rot-Gr
Page 17 and 18: Localities (Facies and Sponge Analy
Page 33: Localities (Facies and Sponge Analy
Page 51: Localities (Facies and Sponge Analy
Page 54 and 55: 54 and ferromanganese crusts. The b
Page 56 and 57: 56 5.1.1. The Sponge Fauna of the S
Page 58 and 59: 58 Skeleton: Lyssacinosid type with
Page 60 and 61: 60 Fig. 29a. Skeleton types and ass
Page 62 and 63: 62 new data from recent species to
Page 64 and 65: 64 sheltered by the adjacent sand d
Page 66 and 67: 66 In addition to the episodic sedi
Page 68 and 69: 68 found in the most condensed sect
Page 70 and 71: 70 5.2.1. The Sponge Fauna of the S
Page 72 and 73: 72 5.2.2. Diagenesis Sponge-dominat
Page 75 and 76: Fossil Record of Sponges 75 6. Foss
Page 77 and 78: Fossil Record of Sponges 77 Fig. 35
Page 83 and 84: Comparison with other Spiculites 83
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Comparison with other Spiculites 85
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88 Hallam 1996; Hallam and Goodfell
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90 From the Lower Liassic Kendlbach
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92 At Steinplatte/Plattenkogel loca
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94 8.2. Major and Trace Elements We
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96 sediments. Due to this “contam
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98 significance of microbial involv
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100
Page 102 and 103:
102 � The Lower Liassic sediments
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104 Böhm F (1992) Mikrofazies und
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106 Garrison RE, Fischer AG (1969)
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108 Krause FF, Scotese CR, Nieto C,
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110 Olsen PE, Kent DV, Sues H-D, Ko
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112 Schulze FE (1904) Hexactinellid
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114 Wendt J (1969) Stratigraphie un
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Plate 1 Glasenbachklamm - Lower Lia
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Plate 2 Mühlstein-South - Hornstei
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Plate 3 Sonntagkendlgraben - Flecke
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Plate 4 Hochgern - Liassic sediment
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Plate 5 Scheibelberg - Type locatio
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Plate 6 Luegwinkel - Liassic sedime
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Plate 7 Moosbergalm - Slope and bas
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Plate 8 Tannhauser Berg - Liassic s
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Plate 9 Adnet / Rot-Grau-Schnöll Q
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Plate 10 Adnet / Rot-Grau-Schnöll
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Plate 15 Adnet / Lienbacher Quarry
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Plate 16 Adnet / Eisenmann Quarry -
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Plate 17 Steinplatte / Plattenkogel
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Plate 21 Diapir of Murguia / Spain
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Plate 22 Arctic Vesterisbanken Seam
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Supplement 1.1 (datas to Fig. 42) -
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Supplement 1.2 (datas to Fig. 43 +
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Supplement 2. (datas to Fig. 47) -
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Supplement 3.2 (datas to Fig. 46) -
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Supplement 4. - Energy Dispersive X
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Supplement 6. - Register of Localit
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Steinplatte/Fischer’s Coral Garde
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Publications Parts of this study ar
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Curriculum Vitae Geboren in Bremerh
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