”…As far as I can tel, as beautiful as they may be, those engravings have a very different style than that of Vero Beach. In particular they don't look alike any of the known highly realistic engravings found elsewhere in Europe and Africa while the Vero Beach engraving is quite similar to many of these European realistic engravings…”
Agreed. The engravings from Valsequillo don’t come close to portraying the realism of the Vero Beach specimen: the degree of three dimensional space; motion, etc…
”…Concerning the dating of this Valsequillo artefact, not being a specialist of America Palaeoanthropology, I can't figure which dates to believe given the controversies that seem to surround this subject…”
The main controversy that exists now is whether the artifact bearing beds are contained in strata that have been inset more recently than the dated strata. Mike Waters, with Center for the Study of the First Americans and Texas A&M, is currently working on this hypothesis. VanLandingham’s biostratigraphical analyses are at odds with this hypothesis. However, Waters has not yet reported on his analyses. I’m keeping an open mind and waiting to see what he has.
”…It would be important to know if this engraving dates from the Aurignacian or more like the Vero Beach one of the Magdalenian, using here the periods as described for European Palaeolithic art (sorry if this is not the appropriate way to name these periods for American prehistoric art...)…”
According to Armenta, the engraving was recovered from strata named Tetela 1. U-series dating conducted by Chuck Naeser (USGS) on the Tetela 1 indicated an age range of 600kya +/- 340ka. Sam VanLandingham’s biostratigraphy analyses indicate the Tetela 1 strata are pre-Wisconsin (greater than ca. 80kya). As you can tell, these are broad strokes but they do give minimum and maximum ages. The low-end of Naeser’s range is concordant with:
1. Barney Szabo’s (USGS) U-series dating of the stone artifact bearing beds- ca. 245kya for the bifacial bearing beds and ca. 280kya for the unifacial bearing beds.
2. Naeser’s own dating of the stone artifact bearing beds- 370kya +/- 200ka.
3. Ken Farley’s (Caltech) U-series dating of the stone artifact bearing beds- 400-500kya.
4. Ray Donelick’s (University of Idaho at the time) U-series dating of the stone artifact bearing beds- no younger than 250kya.
5. VanLandingham’s biostratigraphical analyses of the stone artifact bearing beds- no younger than 80kya and no older than ca. 430kya.
6. Recent USGS magnetic alignment analyses- no reverse polarity- therefore no older than ca. 700kya.
”Any reliable sources?”
I can give you these for now:
---------- VanLandingham, S.L., in press, Use of diatoms in determining age and paleoenvironment of the Valsequillo (Hueyatlaco) early man site, Puebla, Mexico, with corroboration by Chrysophta cysts for a maximum Yarmouthian (430,000 - 500,000 yr BP) age of the artifacts, International Chrysophyte Symposium volume.
----------, 2009, Use of diatom biostratigraphy in determining a minimum (Sangamonian = 80,000--ca. 220,000 yr. BP) and a maximum (Illinoian = 220,000--430,000 yr. BP) age for the Hueyatlaco artifacts, Puebla, Mexico. Nova Hedwigia, Beiheft 135, p. 15-36.
----------, 2008, Yarmouthian (430,000 - 500,000 yr BP) chrysophyte cyst assemblages aid in corroborating a maximum Illinoian (ca. 220,000 - 430,000 yr BP) age for the artifacts at the Hueyatlaco site, Puebla, Mexico (abs.), 7th International Chrysophyte Symposium, Connecticut College, 270 Mohegan Ave., New London, Connecticut, June 22-26, 2008, Program (with abstracts) Abstract: Bona fide artifacts have been found in situ in sedimentary deposits which, by various reputable means (including fossil cysts), have been demonstrated to be older than the Last Ice Age, but most American archaeologists disagree. No other archaeological site in the world is known to be associated with such highly significant age and environmentally diagnostic cyst/diatom evidence as Hueyatlaco. Two diagnostic Yarmouthian (430,000 - 500,000 yr BP) cyst assemblages (in samples VL2149 and VL2316) occur in a bed (Unit J) which is conformably below (and older) than the lowermost artifact-bearing bed (Unit I) at the Hueyatlaco archaeological site. And these two samples correlate with a third diagnostic Yarmouthian sample (68M288=VL2243) from a core 7 km NNW at Rancho Batan. The extinctions and earliest known first occurrences of the 26 extant and 8 extinct cyst taxa in the three samples (with a minimum 430,000 yr BP Yarmouthian age) corroborate a maximum of 430,000 yr BP age for the Hueyatlaco artifacts which previously was established by means of cyst/diatom assemblages with a maximum age of Illinoian (220,000 - 430,000 yr BP) in Unit I.
----------, 2006, Diatom evidence for autochthonous artifact deposition in the Valsequillo region, Puebla, Mexico during the Sangamonian (sensu lato = 80,000 to ca 220,000 yr BP and Illinoian (220,000 to 430,000 yr BP). J. Paleolimnol, 36, 101-116.
----------, 2004, Corroboration of Sangamonian age of artifacts from the Valsequillo region, Puebla, Mexico by means of diatom biostratigraphy. micropaleontology, 50:4, 313-342.
----------, 2002, Corroboration of Sangamonian Interglacial age artifacts at the Valsequillo archaeological area, Puebla, Mexico, by means of paleoecology and biostratigraphy of Chrysophyta cysts. Transactions of the 37th Regional Archaeological Symposium for Southern New Mexico and West Texas -- Southwestern Federation of Archaeological Societies Annual Meeting, April 6-7, 2001, Iraan, Texas, pp. 1-14.
----------, 2000, Sangamonian Interglacial (Middle Pleistocene) environments of deposition of artifacts at the Valsequillo archaeological site, Puebla, Mexico. Transactions, 35th Regional Archaeological Symposium for Southern New Mexico and Western Texas -- Southwest Federation of Archaeological Societies Annual Meeting, April 9-11, 1999, Midland, Texas, pp. 81-98.
---------, 1981, Geologic evidence for age of deposits at Hueyatlaco archeological site, Vasequillo, MexicoQuaternary Research 16, 1-17Virginia Steen-McIntyre, Roald Fryxell, Harold E. Malde
I don’t read Spanish, so the best I can do:
http://www.valsequilloclassic.net/nuke/armenta/armenta_monograph.pdf I’ll get with Steen-McIntyre on other published material.
Charlie