Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/njg.2014.32 |
Geological setting and paleoecology of the Upper Cretaceous Bench 19 Marine Vertebrate Bonebed at Bentiaba, Angola | |
Strganac, C.1,2; Jacobs, L. L.1; Polcyn, M. J.1; Mateus, O.3,4; Myers, T. S.1; Salminen, J.5,6; May, S. R.1; Araujo, R.1,4; Ferguson, K. M.1; Olimpio Goncalves, A.7; Morais, M. L.7; Schulp, A. S.8,9,10; da Silva Tavares, T.7,11 | |
通讯作者 | Strganac, C. |
来源期刊 | NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW
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ISSN | 0016-7746 |
EISSN | 1573-9708 |
出版年 | 2015 |
卷号 | 94期号:1页码:121-136 |
英文摘要 | The Bench 19 Bonebed at Bentiaba, Angola, is a unique concentration of marine vertebrates preserving six species of mosasaurs in sediments best correlated by magnetostratigraphy to chron C32n.1n between 71.4 and 71.64 Ma. The bonebed formed at a paleolatitude near 24 degrees S, with an Atlantic width at that latitude approximating 2700 km, roughly half that of the current width. The locality lies on an uncharacteristically narrow continental shelf near transform faults that controlled the coastal outline of Africa in the formation of the South Atlantic Ocean. Biostratigraphic change through the Bentiaba section indicates that the accumulation occurred in an ecological time dimension within the 240 ky bin delimited by chron 32n.1n. The fauna occurs in a 10 m sand unit in the Mocuio Formation with bones and partial skeletons concentrated in, but not limited to, the basal 1-2 m. The sediment entombing the fossils is an immature feldspathic sand shown by detrital zircon ages to be derived from nearby granitic shield rocks. Specimens do not appear to have a strong preferred orientation and they are not concentrated in a strand line. Stable oxygen isotope analysis of associated bivalve shells indicates a water temperature of 18.5 degrees C. The bonebed is clearly mixed with scattered dinosaur and pterosaur elements in amarine assemblage. Gut contents, scavenging marks and associated shed shark teeth in the Bench 19 Fauna indicate biological association and attrition due to feeding activities. The ecological diversity of mosasaur species is shown by tooth and body- size disparity and by delta C-13 analysis of tooth enamel, which indicate a variety of foraging areas and dietary niches. The Bench 19 Fauna was formed in arid latitudes along a coastal desert similar to that of modern Namibia on a narrow, tectonically controlled continental shelf, in shallow waters below wave base. The area was used as a foraging ground for diverse species, including molluscivorus Globidens phosphaticus, small species expected near the coast, abundant Prognathodon kianda, which fed on other mosasaurs at Bench 19, and species that may have been transient and opportunistic feeders in the area. |
英文关键词 | mosasaur paleoecology continental shelf detrital zircons Africa Cretaceous |
类型 | Article |
语种 | 英语 |
国家 | USA ; Portugal ; Finland ; Angola ; Netherlands ; France |
收录类别 | SCI-E |
WOS记录号 | WOS:000350989700012 |
WOS关键词 | PISCO FORMATION ; MOSASAUR ; NORTH ; ECOLOGY ; PRESERVATION ; GLOBIDENS ; SEDIMENTS ; ATLANTIC |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/189353 |
作者单位 | 1.So Methodist Univ, Roy M Huffington Dept Earth Sci, Dallas, TX 75275 USA; 2.Perot Museum Nat & Sci, Dallas, TX 75201 USA; 3.Univ Nova Lisboa, Fac Ciencias & Tecnol, GeoBioTec, Caparica, Portugal; 4.Museu Lourinha, P-2530157 Lourinha, Portugal; 5.Univ Helsinki, Dept Phys, FIN-00014 Helsinki, Finland; 6.Univ Helsinki, Dept Geosci & Geog, FIN-00014 Helsinki, Finland; 7.Univ Agostinho Neto, Fac Ciencas, Dept Geol, Luanda, Angola; 8.Nat Hist Museum Maastricht, NL-6211 KJ Maastricht, Netherlands; 9.Vrije Univ Amsterdam, Fac Earth & Life Sci, NL-1081 HV Amsterdam, Netherlands; 10.Nat Biodivers Ctr, NL-2300 RA Leiden, Netherlands; 11.Univ Bourgogne, Dijon, France |
推荐引用方式 GB/T 7714 | Strganac, C.,Jacobs, L. L.,Polcyn, M. J.,et al. Geological setting and paleoecology of the Upper Cretaceous Bench 19 Marine Vertebrate Bonebed at Bentiaba, Angola[J],2015,94(1):121-136. |
APA | Strganac, C..,Jacobs, L. L..,Polcyn, M. J..,Mateus, O..,Myers, T. S..,...&da Silva Tavares, T..(2015).Geological setting and paleoecology of the Upper Cretaceous Bench 19 Marine Vertebrate Bonebed at Bentiaba, Angola.NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW,94(1),121-136. |
MLA | Strganac, C.,et al."Geological setting and paleoecology of the Upper Cretaceous Bench 19 Marine Vertebrate Bonebed at Bentiaba, Angola".NETHERLANDS JOURNAL OF GEOSCIENCES-GEOLOGIE EN MIJNBOUW 94.1(2015):121-136. |
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