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Samenvatting
Bonebeds of chasmosaurine ceratopsian dinosaurs are surprisingly rare compared to the high relative
abundance of isolated material of this group in the fossil record. Here, we describe a large bonebed of
Triceratops horridus with at least five individuals, abundant postcranial material preserved (>30%) and
skeletons displaying features of subadult and adult ontogenetic stages. Hence, this fossil locality can
shed new light on the osteology, ontogeny and possible gregarious behaviour of this iconic horned
dinosaur. Since 2013, Naturalis Biodiversity Center has been excavating this bonebed, which is
situated in eastern Wyoming (USA) and comprises fluvial sediments from the lower part of the Upper
Maastrichtian Lance Formation. Five field campaigns and a 3D survey including drone
photogrammetry resulted in a high-resolution 3D model of the excavation site, incorporating the spatial
position of >1100 bone elements and >500 sediment samples.
Integrating this 3D framework with a multi-proxy study of osteohistology and sedimentological and
geochemical analysis allows for a detailed taphonomic reconstruction. The bone layer is c. 0,5 m thick
and stretches over an area of c. 200 m2, displaying disarticulated but associated skeletal remains with
little evidence of scavenging. Grain-size, loss-on-ignition, XRF and palaeobotanical data suggests a
paludal environment that experienced two separate flooding events. We propose that the Triceratops
individuals in this bonebed were mired, possibly as a group, and post-mortem rapidly buried by two
crevasse splays of coarse silt to very fine sand. This explains both the lateral bone distribution and the
rare preservation of small postcranial elements such as unguals.
Originele taal-2 | English |
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Titel | European Association of Vertebrate Paleontology, Program and Abstracts, 2019 |
Hoofdstuk | 17 |
Pagina's | 54 |
Aantal pagina's | 1 |
Volume | 17 |
Status | Published - 3 jul 2019 |
Evenement | European Association of Vertebrate Paleontologists: XVII Annual Meeting - Royal Belgian Institute of Natural Sciences, Brussels, Belgium Duur: 2 jul 2019 → 6 jul 2019 Congresnummer: XVII https://eavpbrussels.wixsite.com/eavp2019 |
Conference
Conference | European Association of Vertebrate Paleontologists: XVII Annual Meeting |
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Verkorte titel | EAVP |
Land/Regio | Belgium |
Stad | Brussels |
Periode | 2/07/19 → 6/07/19 |
Internet adres |
Vingerafdruk
Duik in de onderzoeksthema's van 'TAPHONOMY OF A UNIQUE MULTIGENERATIONAL TRICERATOPS BONEBED FROM EASTERN WYOMING (USA): NEW INSIGHTS FROM A MULTI-PROXY PERSPECTIVE'. Samen vormen ze een unieke vingerafdruk.Activiteiten
- 1 Hosting an academic visitor
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Jimmy De Rooij
Pim Kaskes (Host), Philippe Claeys (Host), Steven Goderis (Host) & Christophe Snoeck (Host)
21 feb 2022 → 25 feb 2022Activiteit: Hosting an academic visitor