Skip to content. | Skip to navigation

Personal tools

You are here: Home
1787 items matching your search terms.
Filter the results.
Item type

New items since

Sort by relevance · date (newest first) · alphabetically
Inproceedings Reference A special issue on DNA barcoding edited by the Belgian Network for DNA Barcoding (BeBoL)
Located in Library / RBINS Staff Publications
Proceedings Reference A story about knowledge and self-reliance: Biodiversity Research in a Developing Country (DRC)
Located in Library / RBINS Staff Publications 2017
Proceedings Reference A Story Of Unexpected species diversity: the case of the African Pike Hepsetus odoe (Bloch, 1794) (Characiformes: Hepsetidae)
Located in Library / RBINS Staff Publications
Inproceedings Reference A surprisingly short early Holocene humid spell inferred from remnant shorelines and palaeolake deposits in northern Arabia
Early Holocene greening of the Sahara has been inferred from many sedimentary archives (e.g. Hoelzmann et al., 2001). Likewise, over the last two decades similar reconstructions of lakes and a more humid climate have been established for the southern Arabian Peninsula (e.g. Fleitmann et al., 2007; Engel et al., 2017) and the Levant (Bar-Matthews et al., 2003). Such evidence also exists for northern Arabia (Schulz and Whitney, 1986; Crassard et al., 2013; Zielhofer et al., 2018), but is limited in sufficiently robust proxy data and chronological resolution, hampering our understanding of the scarce archaeological record of that time (Hilbert et al., 2014). In this paper, we present latest results of the ongoing DFG-funded project CLEAR, which explores the highly resolved palaeolake record of the sabkha basin in the oasis of Tayma, northern Arabia. Today only flooded episodically after rainfall events, the endorheic basin is encircled by a ring of isolated shoreline deposits in an altitudinal corridor of only a few metres, consisting almost entirely of Melanoides tuberculatus and Hydrobia sp. shells, Amphibalanus amphitrite carapaces, foraminifers, and ostracods, with minor amounts of siliciclastic sand (Engel et al., 2012; Pint et al., 2017). These deposits have recently been mapped and dated by 14C and OSL, and indicate the presence of an early Holocene lake with a depth of up to 17 m and an area of up to 22 km². They correlate with partly varved lake sediments of the central basin according to the 14C-(pollen concentrates), varve- and cryptotephra-based chronology (Dinies et al., 2015; Neugebauer et al., 2017). In the framework of CLEAR, the palaeolake sequence was subjected to detailed sedimentological, geochemical and micropalaeontological analyses (grain-size distribution, XRD, µXRF, thin- section studies, foraminifera, ostracods, diatoms, pollen, stable isotopes, C/N, lipid biomarkers). Current results indicate increasing moisture at Tayma from c. 9300 cal. yrs. BP with pronounced humid conditions only over the second half of the 9th millennium BP, represented by an annually varved sequence of aragonite-, diatom-, and clastic silt- dominated laminae. After 7950 cal. yrs. BP, aridification set in, leading to sabkha development at c. 4200 cal. yrs. BP and the accumulation of aeolian sand. The rather short period of increased moisture availability contrasts with adjacent records from southern Arabia and the Levantine region (Bar-Matthews et al., 2003; Fleitmann et al., 2007), which reflect more humid conditions over several millennia during the early to mid-Holocene. This is a contribution to the research project “CLEAR – Holocene Climatic Events of Northern Arabia” (DFG PL 535/2-1; FR 1489/5-1; EN 977/2-1); see also contribution Pint et al. (this conference) and project website References: Bar-Matthews, M, et al., Geochim. Cosmochim. Acta 67, 3181–3199 (2003); Crassard, R., et al., PLOS ONE 8, e68061 (2013); Dinies, M., et al., Quat. Int. 382, 293–302 (2015); Engel, M., et al., 2012, Quat. Int. 266, 131–141 (2012); Engel, M., et al., Global Planet. Change 148, 258–267 (2017); Fleitmann, D., et al., Quat. Sci. Rev. 26, 170–188 (2007); Hilbert, Y.H., et al., J. Archaeol. Sci. 50, 460–474 (2014); Hoelzmann, P., et al., Palaeogeogr. Palaeocl. 169, 193–217 (2001); Neugebauer, I., et al., Quat. Sci. Rev. 170 269–275 (2017); Pint, A., et al., J. Foram. Res. 42, 175–187 (2017); Schulz, E., Whitney, Hydrobiologia 143, 175–190 (1986); Zielhofer, C., et al., Quat. Int. 473, 120–140 (2018).
Located in Library / RBINS Staff Publications 2018
Proceedings Reference A syntectonic Alkaline Massif in Burundi: geometry, fluid-rock interaction and element (REE, HFSE) mobility.
Located in Library / RBINS Staff Publications
Proceedings Reference A tale about knowledge and empowerment: Rebuilding biodiversity related capacities in the DR Congo
Located in Library / RBINS Staff Publications
Inproceedings Reference A Tournaisian (Lower Carboniferous) silicified brachiopod-coral fauna from South Belgium
Located in Library / RBINS Staff Publications
Inproceedings Reference A tri-modal flocculation model coupled with TELEMAC for suspended cohesive sediments in the Belgian coastal zone
Located in Library / RBINS Staff Publications 2017
Inproceedings Reference A ziphodont crocodylomorph from the Eraly Eocene of Vastan Lignite Mine (Gujarat, India)
Since 2004, the early Eocene Vastan lignite mine (Cambay Shale Formation, Gujarat, Western India) has yielded a rich herpetofauna with frogs, snakes, and lizards (Rage et al., 2008; Folie et al., 2013; Rana et al., 2013). But it is only in January 2012 that the first crocodylomorph remains were retrieved all together in one very thin lens of a few meters width. This small collection includes 4 teeth, 3 fragmentary vertebrae, 1 fragmentary femur, and 2 metapodials. All the teeth are characterized by being distinctly elongated and labiolingually compressed. When well preserved, the mesiodistal carinae bear distinct serrations of the enamel (the ziphodont condition). The largest crown available is estimated to be at least 30 mm tall. In labial or lingual view, the outline of the crown is rather symmetrical. On the other hand, the smallest tooth is asymmetrical being curved in labial view with a nearly straight distal margin and a convex mesial margin. The fragmentary vertebrae share a slightly amphicoelous condition of the centrum. The largest centrum is 32.9 mm long and the neurocentral suture not clearly visible. A modest but well visible hypapophysis is placed close to the anterior edge of the centrum of both these vertebrae. The fragmentary left femur is represented by a proximal portion 45.0 mm long, extending from the totally eroded epiphysis to slightly distally to the fourth trochanter. The largest diameter at the level of the trochanter is 11.6 mm. The ziphodont crocodylomorph teeth reported from a few Paleogene localities of the Indian subcontinent have been referred to both Pristichampsinae and Sebecosuchidae (Sahni & Srivastava, 1976; Buffettaut, 1978; Sahni et al., 1978; Gupta & Kumar, 2013). However, the latter taxon is considered absent in the Tertiary of Asia and amphyplatian vertebrae found in association with ziphodont teeth have been referred to dyrosaurids (Buffettaut, 1978; Turner & Calvo, 2005). Although non-eusuchian crocodylomorphs are restricted to two groups in the Paleogene (Dyrosauridae and Sebecosuchia), our limited knowledge of their postcranial anatomy renders identification of fragmentary remains difficult. Different hypotheses for the identity of the crocodylomorph remains from Vastan are presented.
Located in Library / RBINS Staff Publications
Inproceedings Reference About canals and qanats: long-term human impact on Late Quaternary alluvial landscapes
Located in Library / RBINS Staff Publications