AYUDA!! FOSILES EN CANARIAS

Hola! me gustaría saber, si alguien puede resolverme la duda, que son estos fosiles que encontré, creo que algunos pueden ser huevos de lagarto, otros nidos de avispa y otros caracolas cristalizadas, pero no sé nada de fósiles así que lo dejo en manos de expertos. Muchas gracias.[left] https://2img.net/r/ihimg/photo/my-images/839/1001304j.jpg/ https://2img.net/r/ihimg/photo/my-images/59/1001305d.jpg/

Yo no veo ningun fosil... Eso si;son formaciones minerales muy interesantes.
Yo diria que son cantos rodados de origen sedimentario quimico (siliceos?), posiblemente de origen marino, cementados con una colada volcanica cargada de minerales (tonos claros-verdosos).
Es posible que la colada llegase a una zona marina o sedimentaria, y se adheriesen los cantitos...Muy bonitas y curiosas piezas minerales!

A mi la primera, muy curiosa, me parece crecimiento mineral en una vacuola. ¿Te has fijado si todas tienen la"laminación" en el mismo plano? Algo que marque un horizonte o nivelación por gravedad por ejemplo?. El segundo me recuerda mucho a los nidos de abejas terreras, las que hacen los nidos independientes en los taludes. Tengo uno que me trajeron de allí. Se llaman nidos de Anthophora. Mírate este artículos. Mira la página 324.

La contribution des poussières aux limons, sables et paléosols de Fuerteventura (Iles Canaries)

http://rapidshare.com/files/2523773172/abejas%20canarias%20fosiles.pdf

Aquí se ve mejor la imagen y en color, pero no está el artículo completo. http://books.google.es/books?id=8pzrTaDqTn4C&pg=PA291&lpg=PA291&dq=La+contribution+des+poussi%C3%A8res+aux+limons,+sables+et+pal%C3%A9osols+de+Fuerteventura+(Iles+Canaries)&source=bl&ots=PwEP9Kq_QM&sig=5HbSoF8JS6zTXei3zcG-PCVgdcA&hl=es&sa=X&ei=5cdnUYicEsqJhQf0hoHoDg&ved=0CDAQ6AEwAA#v=onepage&q=La%20contribution%20des%20poussi%C3%A8res%20aux%20limons%2C%20sables%20et%20pal%C3%A9osols%20de%20Fuerteventura%20(Iles%20Canaries)&f=false


Otro artículo: http://www.sciencedirect.com/science/article/pii/S0031018201004059

Y este texto que encontré por internet:http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?A2=ind9203&L=bee-l&F=&S=&P=13992

Date: Mon, 16 Mar 1992 09:29:31 CET Reply-To: Discussion of Bee Biology Sender: Discussion of Bee Biology From: "Willem N. Ellis" Subject: fossil Anthophora(?) nests On the Canary Islands Lanzarote and Fuerteventura I several times found large numbers of some fossil or subfossil insect nest, that might well have been made by one or more Anthophora species. The nests are about oval, 2-3 cm long and 1.5-2 cm wide; almost always they are single. No interior lining is recognizable, but the interior is very smooth. The cells are made of sandy loam or (more rarely) pure loam, that has been hardened by the fossilization process to a variable degree. The wall thickness is approx. 3 mm. The opening, at one of the poles, mostly has a narrow rim, has been closed but is, probably subsequently, perforated by a hole of about 7 mm. In perhaps 50% of the nests there is one, sometimes more, opening in the side as well. That they are fossil is certain. I found in Fuerteventura a intertidal rock formation of a few square meters that was entirely composed of these nests. In Lanzarote I once found a small erosion gulllly that had nicely made a steep cut of several meters in the soil, disclosing that the soil contained thousands of these nests, down to the very bottom of the cut. But usually they are found, together with huge numbers of shells of landsnails strewn over the surface of flats of moving sand, where they evidently have been blown bare by the wind. As far as I know, the nests are not found, at least not in these numbers, on the other, i.e. western islands of the Canarias. Except for Gran Canararia, these islands have no dunes, which might be part of the explanation. In the entomological literature pertaining to the Canary Islands (there is a good checklist by A. Machado) I could not find a reference to the these nests. In the geological literature (Rothe) they are mentioned indeed, and called RAntophoraS. This spelling error is signficant, because it is typically a Spanish error, and suggests to me that all identifications go back to one single man, a Spanish geologist called Bravo. The book in which he refers to the nests seems not to be available in The Netherlands, however. Secondary sources tell that Bravo had seen an Anthophora making this type of nest in the Orotava region (Tenerife) - which is a very different habitat indeed. I should add, finally, that closely similar nests are sometimes offered for sale in fossils shop, with "Australia" as origin, but I cannot testify that this is genuine. Does this long (apologies) description rings a bell to some of you on the list? The apidological literature has brought me nowhere, so far. Thanks in advance for any help! Willem Ellis (Inst. of Taxonomic Zoology, dept. Entomology, Univ. of Amsterdam).

Anthophora fossil nets https://www.google.es/search?safe=off&rlz=1C1GGGE_enES383ES383&psj=1&bav=on.2,or.r_qf.&bvm=bv.45175338,d.ZG4&biw=1280&bih=685&um=1&ie=UTF-8&hl=es&tbm=isch&source=og&sa=N&tab=wi&ei=tcVnUcqVEYeHhQevsIGoCw&q=fossil%20Anthophora%20nests

También he visto que cuando no se sabe de que insecto es reciben su nombre por icnoforma, llamadas Celliforma http://www.flickr.com/photos/banco_imagenes_geologicas/5008992570/

¡Qué interesante!

ATG, gracias por la información y a Lumpen, gracias por compartir esas fotos y bienvenido al foro. Saludos a todos.