Carbon, oxygen and strontium isotope records of Devonian brachiopod shell calcite

Geldern, Robert van; Joachimski, Michael M.; Day, Jed; Jansen, Ulrich; Álvarez, Fernándo; Yolkin, E A; Ma, Xueping

doi:10.1016/j.palaeo.2006.03.045

Cited by 203 publications

(116 citation statements)

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“…water temperatures on the shelves of western and northern Gondwana have been confirmed by oxygen isotope analyses by van Geldern et al (2006, see also Lubeseder et al 2009). Early Devonian deposits display a rather uniform, mostly clayey to marly facies as well as moderate thickness changes in the eastern Anti-Atlas (Belka et al 1997, Kaufmann 1998).…”

mentioning

confidence: 75%

Diversity and palaeoecology of Early Devonian invertebrate associations in the Tafilalt (Anti-Atlas, Morocco)

Frey¹,

Naglik²,

Hofmann³

et al. 2013

Bull. Geosci.

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Quantitative analyses of the taxonomic composition and palaeoecology of five Early Devonian faunules (earliest Lochkovian to early Emsian) collected from the locality Jebel Ouaoufilal in the Tafilalt (Morocco) were conducted. We examined 3376 specimens belonging to 158 species and their stratigraphic distribution. The quantitative data sets were analysed for alpha diversity and ecospace utilization. Macrofossils of every faunule were identified, counted and grouped according to ecological categories of tiering, motility and feeding behaviour. Based on these data, we noted (i) a strong increase in species richness, especially in benthic species, from the lowermost Lochkovian to the Pragian stage and a following subtle decrease in the early Emsian and (ii) a considerable expansion of ecospace use from the earliest Lochkovian to the early Emsian. These general trends are considered to be a result of favourable living conditions due to a growing oxygen content at the sea floor, which correlates with a regional and potentially a global regression from the Lochkovian to the Pragian. A transgression in the early Zlíchovian probably reduced the species richness by decreasing the oxygenation of bottom waters. Additionally, we described and figured three new genera and six new species of the diverse Pragian faunule (86 species): the hederelloid Filihernodia buccina gen. et sp. nov., the crinoid Hexawacrinus claudiakurtae gen. et sp. nov., the gastropods Oriomphalus multiornatus sp. nov., Eohormotomina restisevoluta gen. et sp. nov., and the cephalopods Tenuitheoceras secretum gen. et sp. nov. and Arionoceras kennethdebaetsi sp. nov. We record the first occurrence of Tiaracrinus moravicus from Africa. •

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mentioning

confidence: 75%

Diversity and palaeoecology of Early Devonian invertebrate associations in the Tafilalt (Anti-Atlas, Morocco)

Frey¹,

Naglik²,

Hofmann³

et al. 2013

Bull. Geosci.

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“…Joachimski et al, 2002), or incomplete due to unconformities and depositional hiatuses related to the sharp marine regression in the uppermost Frasnian (Johnson et al, 1985;Sandberg et al, 1988;Geldsetzer et al, 1993;Muchez et al, 1996;Stephens and Sumner, 2003), and/or limited in terms of sampling density or biostratigraphic control at the intrabiozonal scale (e.g. Bratton et al, 1999;Stephens and Sumner, 2003;van Geldern et al, 2006). This contribution reports new data from the northern margin of Gondwana in order to constrain the timing of the Upper Kellwasser excursion and to better understand the causal mechanism(s) relating to the Kellwasser events.…”

Section: Introductionmentioning

confidence: 93%

Upper Kellwasser carbon isotope excursion pre-dates the F–F boundary in the Upper Devonian Lennard Shelf carbonate system, Canning Basin, Western Australia

Hillbun

Playton

Tohver

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…It has been speculated that the Colle mounds grew in somewhat cooler water based on the deeper-water setting, the fact that extant siliceous sponges grow exclusively in waters colder than 15° C and the palaeolatitudinal position of northern Spain at the southern margin of the tropical/subtropical belt (Krautter 1997;Copper 2002). However, sea surface temperature calculations for Early Devonian localities (including the Cantabrian Mountains) reveal a mean temperature of 25° C typical for modern tropical/ subtropical surface waters VanGeldern et al (2006).…”

Section: Environment and Palaeoecologymentioning

confidence: 99%

First fossil sponge from Antarctica and its paleobiogeographical significance

Vodrážka

Crame

2011

J. Paleontol.

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Laocoetis piserai n. sp. (Hexactinellida, Porifera) from the mid-Cretaceous (i.e., Albian–Cenomanian) of James Ross Island is the first record of a fossil sponge from Antarctica. This new occurrence of a formerly widespread genus was restricted to relatively deep waters on the margins of an active volcanic arc. Its occurrence in Antarctica is further evidence that the genus Laocoetis underwent a dramatic reduction in its geographic range through the Cenozoic. The only living species of the genus at the present day is Laocoetis perion from Madagascar.

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Carbon, oxygen and strontium isotope records of Devonian brachiopod shell calcite

Cited by 203 publications

References 75 publications

Diversity and palaeoecology of Early Devonian invertebrate associations in the Tafilalt (Anti-Atlas, Morocco)

Diversity and palaeoecology of Early Devonian invertebrate associations in the Tafilalt (Anti-Atlas, Morocco)

Upper Kellwasser carbon isotope excursion pre-dates the F–F boundary in the Upper Devonian Lennard Shelf carbonate system, Canning Basin, Western Australia

First fossil sponge from Antarctica and its paleobiogeographical significance

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