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Geociencias. Medio ambiente
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Mineralogical, elemental and chemical composition of dinosaur bones from Teruel (Spain) - Luque Ripoll, Luis de; Alcalá Martínez, Luis; Mampel, L.; Pesquero, María Dolores; Cobos, Alberto; Aberasturi, Ainara; Marzo, Paz; Alloza Izquierdo, Ramiro
A detailed study has been carried out on 25 samples of dinosaur bone fragments which come from 8 sites belonging to six stratigraphic units that span from the Tithonian (Upper Jurassic) to Albian (Lower Cretaceous) in the province of Teruel, Spain. The aim of the study is to further understand the mineralogical, elemental and chemical composition of the bones which come from different depositional environments and try to determine the processes which created this composition starting from the initial biogenic phosphate. A diversity of chemical compositions within the same sedimentary environment, within the same site and even within the same...
"I hunt chickens, men hunt me": the biostratinomy of a shot red fox (vulpes vulpes L.) a case study - Gál, Erika
In this paper the author presents the decay process of a shot red fox that decomposed in a temperate forest environment during 2004. Close-up pictures taken regularly are compared with meteorological data concerning temperature and precipitation during the period of investigation. Since neither human- or other vertebrate disturbance, nor water transport or considerable wind affected the body, its complete decay in naturally sheltered conditions (light undergrowth in a wooded area) took about seven month. Due to the unusually warm and humid weeks at the end of the winter and early spring in 2004, however, autolysis, microbial decay and invertebrate scavenging...
Disarticulation and dispersal processes of cervid carcass at the Bosque de Riofrío (Segovia, Spain) - Cáceres Cuello de Oro, Isabel; Esteban Nadal, Montserrat
The Bosque de Riofrio, a natural forest and reserve in Spain (Segovia), has a wide population of red deer and fallow deer. The park, open to the public during the day light, has an extensive area restricted to the staff that take care of these wild animals in wild conditions. Carcasses derived from natural deaths are recorded by the park rangers, as population control, but left exposed to natural conditions and preserved by them from human entries. Since 2000 we are carrying out a project on dispersal and disarticulation of carcasses. Red fox and vultures also inhabit the reserve and...
The paradox of barren ancient rocky shores in the western mediterranean - Braga Alarcón, Juan Carlos; Checa González, Antonio Gerardo; Aguirre Rodríguez, Julio; Bennàsar, Mª de Lluc; Fernández Jalvo, Yolanda
Encrusting coralline red algae cover significant proportions of the surface of rocky walls, blocks, and boulders in the mid- and infralittoral zones in present-day temperate seas. Despite the common occurrence of their living counterparts, examples of fossil coralline plants attached to rock surfaces in ancient temperate shores are very scarce and can be considered cases of exceptional preservation. In the Mediterranean region, however, the most frequent encrusting species have existed at least since the Miocene; they comprise heavily calcified plants which, a priori, should have a high preservation potential. In fact, fossil representatives of these species are relatively common as...
Toothmarks on micromammal remains from level TE9 of Sima del Elefante (Sierra de Atapuerca, Burgos, Spain) - Cuenca Bescós, Gloria; Rofes, Juan; Bennàsar, Mª de Lluc
Small toothmarks on Talpa cf. T. europaea humerus have been identified during the taphonomical study of the micromammal remains found in Sima del Elefante site (Sierra de Atapuerca, Burgos). Toothmarks have been compared to Mustela nivalis modern molars and to Mustela palerminea and Beremendia fissidens fossil remains in order to identify the predator producing the marks. The results indicate that marks were produced by a smaller predator than Mustela, and resemble more to those produced by B. fissidens. This insectivorous species is smaller than Talpa and has a poison injector apparatus that allows it to hunt preys which double its...