Certain features of the ramp first uncovered by the IFAO/University of Liverpool team in 2015 at the Old Kingdom alabaster quarry at Hatnub have been heralded as a model for ramps used in construction of the Great Pyramid of Giza. These features include a steep slope of up 20% (11⁰), inclined stairways on both sides and post holes at regular intervals. The archaeologists hypothesize that these features allowed the haul team to be split into two groups, one hauling upslope with a direct pull, and the other downslope on ropes passed around the posts “acting as pulleys”, thus enabling a steep slope to be used. This paper is based on the physics of various arrangements and demonstrates that the hypothesis is untenable as the posts would have acted as bollards and provided no mechanical advantage. The posts were necessary because of the problems large haul teams would have had negotiating the curvature of the ramp. Interesting as the features at Hatnub are, they are unnecessary and undesirable on the ramps that would have been required for pyramid construction, and the hypothesis should be rejected.
يُقدم هذا الفهرس المصور مجموعة مختارة من أهم أسماء ومصطلحات علم الدندروكرونولوجى باللغتين العربية والإنجليزية. ويهدف إلى تعريف متحدثي اللغة العربية بأدبيات هذا العلم على أمل تطبيق أبحاث حلقات نمو الأشجار بصورة أوسع فى الدراسات الأثرية وخصوصاً بـمصر
This illustrated glossary presents a selection of essential terms and people in the study of dendrochronology, in Arabic and English. It is intended to make accessible an array of related literature to Arabic readers, in hopes that the application of tree-ring research will be more widely applied to archaeological studies, especially in Egypt.
Stone beads are one of the most common artifacts of ancient Egypt, but despite this they have received little attention from scholars. The first and only attempt at a comprehensive study is the late 1930’s investigation of Nai Xia, who looked at beads in all materials at what is now the Petrie Museum of Egyptian Archaeology, University College London, UK. The present survey builds on the work of Xia, and offers summaries on two aspects of stone beads: first, the relative amounts of rock and mineral varieties used during each period of Egyptian history; and second, the changes in bead form, perforation and polish through time for broad categories of stone.
The article presents a list of funerary cones, which were not included in one of the last collections of the material. These objects were mainly collected from auctions, and the aim is to make these cones available for scholars.
A disconformity and lag deposit that separates the Tallahatta and Lisbon Formations along Pigeon Creek near Red Level, Conecuh-Covington Counties, Alabama contains osteichthyan remains belonging to: Pycnodus sp.; Lepisosteus sp.; Albula sp.; Egertonia isodonta Cocchi, 1864; Cylindracanthus rectus Agassiz, 1843; Sphyraena sp.; Triciurides cf. T. sagittidens Winkler, 1874; Scomberomorus sp.; Ariidae gen. indet.; Ostraciidae gen. indet., and cf. Beryciformes. This fossil osteichthyan assemblage is similar to other contemporaneous nearshore faunas found throughout Alabama, the Atlantic and Gulf Coastal Plains, and elsewhere throughout the Northern Ocean Basin. The accumulation and concentration of osteichthyans between the Tallahatta and Lisbon Formations is the result of third order eustatic sea level fluctuation and reflects a complex taphonomic history of exhumation, transport, and reburial across a shallow, middle Eocene shelf. Wide spread distribution of osteichthyan genera found in the Pigeon Creek assemblage demonstrates the continuity of shallow marine shelf environments of the Northern Atlantic Ocean Basin during the middle Eocene and the utility of osteichthyans in regional and transatlantic stratigraphic studies.
In their recent publication on an overview of theropod discoveries and classification, Hendrickx and colleagues mistakenly attributed the earliest historical reports of non-avian theropods in North America and South America to Joseph Leidy in 1856 and Florentino Ameghino in 1899, respectively. Yet, theropod tracks from Massachusetts had already been reported by Hitchcock in 1836, and isolated theropod centra from Patagonia were described by Lydekker in 1893. We here provide additional information on the earliest theropod discoveries in Asia, America and Oceania. We also credit Thomas Holtz as being the first author to give a phylogenetic definition for the clade Dilophosauridae, and correct the phylogenetic definitions of the clades Allosauroidea and Megalosauria.
Differentiation of tooth size and shape within the jaw (i.e. heterodonty) is an expected pattern in the majority of Neoselachii sharks. Various forms of heterodonty may be observed within an individual set of jaws, which can be the result of tooth position (monognathic), upper or lower jaw position (dignathic), tooth file or developmental position (ontogeny), or between male and female in sex specific differences (gynandric). Heterodonty patterns result from natural selection as a functional linkage tied to feeding niche for both feeding performance and dietary diversity. However, the types and/or degree of heterodonty present in Devonian sharks such as Cladoselache and Ctenacanthus have not previously been discussed or quantified in the literature. The objective of this study was to analyze a number of associated dentitions from representatives of these two genera, all collected from the Cleveland Shale Member of the Ohio Shale (upper Famennian; Upper Devonian), to test for, and quantify, various types of heterodonty within and across taxonomic lineages of early cladodont sharks. Geometric morphometrics and linear measurements were used to describe tooth shape and resulting axes and measurements were regressed with jaw position, tooth file position, and upper versus lower jaw to test for differentiation associated with various types of heterodonty. Teeth from Cladoselache and Ctenacanthus dentitions that were examined did not show any variation in tooth shape consistent with heterodonty. However, tooth size did vary slightly with jaw position and the presence of symphyseal teeth at the lower jaw symphysis does indicate differentiation between upper and lower jaws. Furthermore, the long period of tooth retention characteristic of these genera create a record of ontogenetic heterodonty within a tooth file observable as an increase in tooth size lingually. Although tooth shape did not significantly co-vary with jaw position in either taxa, significant morphometric differences between the two genera were evident. These findings strengthen the taxonomic validity of the genera and recognized species within these genera and provide further insights into the niche of these Devonian sharks.
PalArch’s Journal of Egyptology/Archaeology of Egypt, 12(2) (2015)
A good number of well-established colleagues, such as Brian Fagan, Kara Cooney and Kent Weeks, have written book reviews of ‘Wonderful Things’ (see http://www.aucpress.com/p-4927-wonderful-things.aspx) and I can only confirm their enthusiasm and opinions. ‘Wonderful Things’ “follows […]