Km 10
Basic information
Sample name: Km 10
Reference: M. T. Antunes and P. Mein. 1992. Les plus anciens mammifères terrestres du Miocène marin de Lisbonne - le gisement du Km 10. Ciências da Terra (UNL) 11:127-140 [ER 2445]
Geography
Country: Portugal
Coordinate: 38.86° N, -9.06° W
Coordinate basis: based on nearby landmark
Time interval: Early Miocene
Zone: MN2b
Age basis: zone
Geography comments: "dans la tranchée Est de l'autorroute A1-IP1 (Lisbonne á Porto) au kilomètre 10, près de Quinta da Piedade" (coordinate based on Póvoa de Santa Iria)
"MN 2b... sans qu'on puisse exclure entièrement le début de MN3"
"MN 2b... sans qu'on puisse exclure entièrement le début de MN3"
Environment
Substrate: ground surface
Lithology: conglomerate
Habitat comments: "Il s'agît d'un conglomérat á fraction sableuse importante, avec des galets bien émoussés atteignant de 5 á 10 centimètres de dimension maximum... contenant quelques valves d 'huîtres dispersées et d'autres fossiles"
Methods
Life forms: rodents,other small mammals
Sampling methods: screenwash
Sample size: 54 specimens
Sampling comments: "on a pu faire des observations assez détaillées et prélever des sédiments pour lavage et tamisage (1 tonne environ)"
additional fossils mentioned without useable counts include charophytes, forams including Bolivina, sponges, ostracods, Gryphaea aginensis, Pholas sp., cf. Hemigaleus sp., other selachians, Pagrus, Pagellus, Sargus, Sphyraena sp., Diplocynodon sp., Cainotherium sp, and cf. Andegameryx andegaviensis
additional fossils mentioned without useable counts include charophytes, forams including Bolivina, sponges, ostracods, Gryphaea aginensis, Pholas sp., cf. Hemigaleus sp., other selachians, Pagrus, Pagellus, Sargus, Sphyraena sp., Diplocynodon sp., Cainotherium sp, and cf. Andegameryx andegaviensis
Metadata
Sample number: 2694
Contributor: John Alroy
Enterer: John Alroy
Created: 2017-03-14 20:31:13
Modified: 2023-09-11 10:38:05
Abundance distribution
14 species
6 singletons
total count 54
geometric series index: 31.1
Fisher's α: 6.132
geometric series k: 0.8163
Hurlbert's PIE: 0.8602
Shannon's H: 2.2576
Good's u: 0.8889
Each square represents a species. Square sizes are proportional to counts.
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