Saturday, 28 December 2024

Archaeologists uncover Anglo Saxon sword in Kent.

Archaeologists working at an Anglo Saxon cemetery near Canterbury in Kent, England, (the exact location of which has not been revealed to protect it from looting) have uncovered an Anglo Saxon sword of exceptional quality. This sword has a decorative patterned hilt in silver and guilt, and a blade with a runic inscription, and has been compared to high-quality swords previously discovered at Sutton Hoo in Suffolk and Dover in Kent. Part of the scabbard was preserved along with the sword, this being made from leather and wood, and lined with Beaver fur.

An Anglo Saxon sword unearthed at a sixth century cemetery near Canterbury in Kent. Alice Roberts/BBC/Rare TV.

The grave is the twelfth of about two hundred at the cemetery, which is being excavated by a team of archaeologists led by Duncan Sayer of the University of Central Lancashire, and which contains both male and female burials. All of the male graves excavated at the site so far have contained weapons buried as grave goods, typically spears and sheilds, while all the female graves have contained knives, tools, and items of jewellery, a pattern typical of Anglo Saxon cemeteries.

Interestingly, the occupant of the grave which yielded the sword was also buried with a gold pendant with an inscribed image of a serpent or dragon, an item which would normally be associated with high-status women in Anglo Saxon cemeteries. Since the sword's owner is not thought to have been female, this may be a keepsake from a female relative or loved one. 

The excavation will be featured in the upcoming series of the BBC TV program 'Digging for Britain'.

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The Quadrantid Meteor Shower.

The Quadrantid Meteor Shower is one of the brightest meteor showers of the year, often producing over 100 meteors per hour at its peak, which falls around 3-4 January each year, and is predicted to peak at about 8.00 am on Friday 3 January 2025; three days after the New Moon, which falls on Tuesday 31 December, visibility for the shower should be reasonably good. The meteor shower originates in the constellation of Boötes, high in the northern sky, which is slightly confusing, as most meteor showers are named for the constellation in which they originate. This is because the constellation was named in the sixteenth century by astronomer Tycho Brahe, before the introduction of standardised constellations used by modern astronomers, though to make matters a little more confusing, Brahe didn't name the meteors this way either; the name comes from the constellation of Quadrans Muralis, introduced by Joseph Jérôme Lefrançois de Lalande in 1795, and dropped by the International Astronomical Union in 1922. Because Boötes is visible only from the Northern Hemisphere, the Quadrantid Meteor Shower is not visible from the Southern Hemisphere, and is best viewed from northerly locations such as Canada or Scandinavia.

The radiant point of the Quadrantid Meteors (i.e. the point from which the meteors seem to radiate). American Meteor Society.

Meteor streams are thought to come from dust shed by comets as they come close to the Sun and their icy surfaces begin to evaporate away. Although the dust is separated from the comet, it continues to orbit the Sun on roughly the same orbital path, creating a visible meteor shower when the Earth crosses that path, and flecks of dust burn in the upper atmosphere, due to friction with the atmosphere.

The Earth passing through a stream of comet dust, resulting in a meteor shower. Not to scale. Astro Bob.

The Quadrantid Meteors are unusual in that they typically are only visible for a few hours either side of this peak, whereas other showers are typically visible for days or even weeks. This is thought to be because they originate from an asteroid (196256) 2003 EH1, rather than the tail of a comet as with most meteor showers. The orbit of this asteroid is tilted at an angle of 71.9° to the plane of the Solar System, so that the Earth only very briefly passes through the debris trail left by it, rather than remaining in it for some time, as is the case with the trail of a comet with an orbit in roughly the same plane as the Earth.

The calculated orbit and current position (196256) 2003 EH1.  JPL Small Body Database

(196256) 2003 EH1 is a 2.6-4.0 km diameter object with a 2017 day (5.52 year) orbital period, with an elliptical orbit tilted at an angle of 70.8° to the plain of the Solar System which takes in to 1.19  AU from the Sun (119% of the distance at which the Earth orbits the Sun) and out to 5.05 AU (505% of the distance at which the Earth orbits the Sun slightly inside the orbit of the planet Jupiter). This means that close encounters between the asteroid and Earth happen occasionally, with the last calculated to have happened in December 1936 next predicted in December 2052.  It is therefore classed as an Amor Group Asteroid (an asteroid which comes close to the Earth, but which is never closer to the Sun than the Earth is). (196256) 2003 EH1 also has occasional close encounters with the planet Jupiter, with the last having happened in June 1984, and the next predicted for March 2044.

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Friday, 27 December 2024

Magnitude 6.1 earthquake off the south coast of Cuba.

The National Seismological Research Service of Cuba recorded a Magnitude 6.1 Earthquake at a depth of 9 km, about 35 km off the south coast of Cuba at about 1.00 am local time (about 6.00 am GMT) on Monday 23 December 2024. The event was felt across eastern Cuba, Jamaica, and the Cayman Islands, and while there are no reports of any injuries, minor damage to buildings has been reported from across eastern Cuba, and several roads were blocked by landslides triggered by the Earthquake.

The approximate location of the 23 January 2024 Cuba Earthquake. USGS.

Cuba lies on the southern portion of the North American Plate, to the north of the Septentrional Fault Zone, which forms the boundary with the Gonâve Microplate, a small tectonic plate underlying northern Jamaica and most of the island of Hispaniola. The Gonâve Microplate is moving east relative to the North American Plate, pushed by the Mid-Cayman Spreading centre to the west of Jamaica.

To the south the Gonâve Microplate is separated from the Caribbean Plate by the Enriquilo-Plantain Garden Fault Zone, which runs across Southern Haiti and the Dominican Republic. To the west the fault runs through central Jamaica. The Caribbean Plate is rotating clockwise, effectively moving east relative to the Gonâve Microplate.

Plate movements and fault zones around the Gonâve Microplate. Mike Norton/Wikimedia Commons.

None of these movements are smooth, with rock formations at the boundaries of the plates constantly sticking together then breaking apart as the pressure from the plate movement builds up, triggering Earthquakes in the process.

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An Early Cretaceous Plesiosaur from Ellesmere Island, Canada.

The Plesiosaurs were a group of Marine Reptiles which appeared in the Triassic and persisted till the End of the Cretaceous. The group obtained a global distribution during the Jurassic, when the supercontinent of Pangea broke up and high global temperatures led to large areas of the world's continents being submerged. However, towards the end of this period the situation had changed, when falling sealevels led to many ocean basins becoming isolated, many groups of large Marine Reptiles becoming extinct, and faunal communities becoming provincialized in different ocean basins. Plesiosaurs are not thought to have been strongly affected by the End Jurassic Extinction Event, but their fossil record is poor during the Early Cretaceous, limiting our understanding of the group during this interval.

In a paper published in the journal Acta Palaeontologica Polonica on 2 December 2024, Lene Delsett of the Natural History Museum at the University of Oslo, adam Smith of Nottingham Natural History Museum, Stephen Ingrams of Llandudno, and Simon Schneider of the Cambridge Arctic Shelf Programme, describe a Plesiosaur from the Early Cretaceous Deer Bay Formation of Ellesmere Island in the Canadian Arctic.

The specimen was excavated in 1952 by the Danish geologist Johannes Christian Troelsen, however, while he mentioned it in a report of his expedition to the area, it was never formally described. It was sent to the University of Copenhagen, where it appears to have undergone some preparation work by a student working under the supervision of curator Eigil Nielsen, and possibly subsequent curator Niels Bonde. The remains were subsequently packed into a series of wooden crates, one of which was opened and examined by Adam Smith in 2005. This box were subsequently misplaced, possibly during the flooding which affected the museum in 2011, but was subsequently relocated by curators Bent Lindow and Arden Bashfortht, and its contents transferred to a draw s in the main fossil Vertebrate collection. Two further crates, labelled '“Reptile Creek, Troelsen’s office' were discovered in 2019, and found to contain several girdle elements of the Plesiosaur specimen. Another box was discovered in the collections of the Zoological Museum in 2020, containing what was labelled as part of a 'Scoresbysund Plesiosaur', but which clearly belong to the Elis Island specimen. Another box, labelled 'NHMD 189689' contained some fragmentary ribs which also appeared to belong to the Elis Island specimen, but in the absence of any documentation were not included in the study.

The surviving specimen comprises 22 non-consecutive vertebrae from the cervical, dorsal, and caudal regions, hundreds of rib fragments, partial girdle elements, all four propodials, and several distal limb elements. All these elements are worn, and the larger elements mostly fragmentary. Delsett et al. were able to assign the specimen to the Cryptoclidid genus Colymbosaurus, but, due to the fragmentary nature of the specimen and a limited amount of overlapping material with other specimens, were not able to determine whether it belonged to either of the two previously described species in the genus, or from a different, as yet undescribed species. 

Selected vertebrae of Plesiosaur Colymbosaurus sp. NHMD 189834 from Ellesmere Island, Nunavut, Canada, upper Berriasian–lower Valanginian. (A) Cervical vertebra (centrum C), in articular (A₁), dorsal (A₂), ventral (A₃), and lateral (A₄) views. (B), (C) Pectoral vertebrae. (B) Centrum E in articular view. (C) Centrum D, in articular (C₁) and lateral (C₂) views. (D) Sacral? rib. (E)–(G) Dorsal vertebrae. (E) Centrum H, in articular (E₁) and lateral (E₂) views. (F) Centrum M (dorsal?) in articular view. (G) Centrum I in articular view. (H), (I) Caudal vertebrae. (H) Centrum O in articular view. (I) Centrum P in articular (I₁) and lateral (I₂) views. The letters used in the element names are written on the individual elements. Delsett et al. (2024).

Previous known specimens of Colymbosaurus spp. have been described from Spitsbergen, southern England and western Russia, so the Elis Island specimen represents a significant range expansion for the genus. The genus was therefore present in two separate ocean basins, the Boreal Arctic and Boreal Atlantic, which were connected by two seaways, one running between Norway and Greenland beneath the modern North Atlantic, and one in present day western Russia.

Map with Cryptoclidid occurrences in the Northern hemisphere. (1) Ellesmere Island; (2) Spitsbergen; (3) Great Britain; (4), (5) Russia. Delsett et al. (2024).

The Boreal Ocean during the Late Jurassic and Early Creraceous has been considered to have been an ecologically depleted environment, with most of the described fossils being Bivalves, Ammonites, and Belemnites. However, Cryptoclidid Pleisiosaurs were large, predatory Animals, reliant on Fish for at least part of their protein intake, which implies that these must also have been present. Delsett et al. suggest that, few deposits from this interval are noted for their fossil content, at least part of the apparent absence of many Animal groups may be because most studies of these deposits have concentrated on their stratigraphy rather than their faunal diversity, and therefore useful index fossils, such as shelled Molluscs tend to have been described, whereas less stratigraphically useful fossils, such as Plesiosaurs or Fish, may have been overlooked.

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Sunday, 22 December 2024

A woman buried with weapons in tenth century Hungary.

The concept of 'warrior women' has fascinated historians, archaeologists, and the wider public for a long time. Many examples of potential 'warrior women' from archaeological sites have been put forward over the years, in the form of women buried with weapons and/or armour. However, gender assignment is often difficult in archaeological contexts, as is determining the relationship between the individuals within graves and the goods buried with them, particularly when the remains are fragmentary. Where a person is buried with a single weapon or piece of armour this is as likely to be a talismanic object or mark of social status as it is an indicator of their ever having held a military role.

A number of female burials with weapons have been reported in Hungary's Carpathian Basin, dating from the Sarmatian Period (1st–5th centuries AD), the Gepid Period (second half of the 5th century–567 AD), the Langobard Period (510–568 AD), and the Avar Period (ca. 567–9th century AD). However, typically only a single arrowhead, small piece of chainmail, or similar isolated item has been found in the grave, which is significantly less than is found in male 'warrior burials' from the same cultures, making it unlikely that these represent female warriors.

The Maygars, or Hungarians, migrated from the steppes of Eurasia to the Lower Danube region around 830 AD, subsequently reaching the Carpathian Basin by the late nineth or early tenth century. They soon came to control the area, forming the Kingdom of Hungary at the end of the tenth century. During this time, Hungarian mounted archers gained a fearsome reputation, both within the Carpathian Basin and in conflicts across much of the rest of Europe. Hungarian warrior burials are common from this period, with warriors found buried with a range of weapons including axes, spears, sabres, swords, and swords with sabre hilts, as well as composite bows, arrows, quivers, and bow-cases. Archery equipment is far more ubiquitous in these graves. However, our understanding of these burials is limited by the preservational conditions in the Carpathian Basin, which mean that in most cases only inorganic parts of weapons and equipment have survived, and an apparent lack of any correlation between the presence and quantity of grave goods and the social status of the person they are buried with.

In a paper published in the journal PLOS One on 26 November 2024, a team of archaeologists led by Balázs Tihanyi of the Department of Biological Anthropology and the Department of Archaeology at the University of Szeged, and the Department of Archaeogenetics at the Institute of Hungarian Research, describe a woman buried with weapons from the tenth century Sárrétudvari–Hízófóld Cemetery in Hajdú-Bihar County, Hungary.

Map of Hungary showing the location of the Sárrétudvari–Hízófóld archaeological site. Luca Kis in Tihanyi et al. (2024).

The Sárrétudvari–Hízófóld Cemetery, close to the village of Sárrétudvari in Hajdú-Bihar County, was excavated in 1983-85, and has since been effectively destroyed as an archaeological site by intensive agriculture. The site contained a small number of burials dating back to the Bronze Age, and 262 graves dating from the tenth century AD. The skeletons of 263 individuals were recovered from the 262 graves excavated, with another two individuals identified but two fragmentary to be recovered. Of these individuals, 101 were identified as sub-adults, and 162 as adults. 

An initial assessment of the individuals from the Sárrétudvari–Hízófóld Cemetery, based upon morphological examination of their skulls and post-cranial skeletons, determined that 70 were female and 85 were male, with the remainder impossible to classify. A subsequent analysis based upon examination of the pelvis only (thought to be a more reliable technique) determined that 52 of the skeletons were female and 69 were male, with a larger proportion of undiagnosable remains. 

The majority of the graves have west-east orientation (i.e. head to the west, feet to the east), although some are orientated north-south, and a smaller number south-north. Most of the individuals were buried flat on their backs in an extended position, although two had bent knees. 

A wide range of grave goods were buried with the individuals in the Sárrétudvari–Hízófóld Cemetery. These include items of jewellery such as penannular hair rings, earrings, strings of beads, bracelets, and finger rings, clothing elements such as belt buckles, bell buttons, and broaches which would have been used to secure dresses, knives, fire-lighting tools, and riding-related items, such as stirrups, bits, fragments of saddle, and even horse bones. Notably, 58 of the individuals were burried with weapons, a far higher proportion than is seen in other known cemetery-sites in the Carpathian Basin in the same period. These weapons include sabres and axes, as well as many archery-related items, such as arrowheads, traces of quiver, and antler bow plates.

One of these armed burials was  Grave No. 63, located at the western end of the cemetery, which contained an individual buried with a southwest-northeast orientation, lying on its side, with knees bent. This individual was buried with a range of grave goods, including a silver penannular hair ring near the left part of the occipital bone, three bell buttons (one positioned beneath the skull, another beneath the right clavicle, and the third close to the knees), a string of beads near the left clavicle, including faience beads with blue eye-shaped inlays, yellow and white semiprecious stone beads, and segmented glass beads in various colours, an 'armour-piercing' arrowhead found at the distal end of the grave pit (several iron fragments possibly belonging to further arrowheads were also found in the soil of the grave), fragmented iron parts of a quiver situated near the left side of the skeleton from the shoulder to the toes, and an antler bow plate with convex sides and peaked ends located near the hip and the left hand, which was possibly being gripped by the individual when buried.

Artifacts found in grave No. 63: 91) arrowhead; (2) bell button; (3) silver penannular hair ring; (4) a string of beads; (5) fragments of bell buttons; and (6) antler bow plate. Zoltán Faur & Luca Kis in Tihanyi et al. (2024).

The individual from Grave No. 63 (SH-63) has a skull with a reasonably well-preserved cranium, but lacking most of the face, of which only the mandible, fragments of the two maxillae, and the left zygomatic bone remain. More than 50% of the post-cranial skeleton is present, but the bones of the spine, sternum, and pelvis are mostly represented by bone fragments. SH-63 has been determined to be an adult on the basis that all of the bones which would be expected to have fused in an adult individual are fused, and the thinness of the bones has been taken as an indication that this was an older individual, although it was not possible to make a more precise age estimation.

The skeletal remains discovered in grave No. 63. (A) Photo indicating the current state of preservation of the bones; and (B) Photo of the burial No. 63 in situ. Luca Kis & Ibolya Nepper in Tihanyi et al. (2024).

The poor preservation of the skeleton. and in particular the pelvis, of SH-63 made it difficult to determine the individual's sex by morphological means. The skull did appear to show some feminine traits, but this was not deemed sufficient to assign a sex to the skull by previous studies. Tihanyi et al. were able to extract genetic from a tooth, one humorous, and the petrosal process of the temporal bone. All three of these indicate that the individual was female, the sample from the pars pretrosa with sufficient confidence to rule out the possibility of the individual being male.

Cranial features used for sex determination showing feminine characteristics. (A) A very small mastoid process; (B) A smooth frontal contour with little or no projection of the glabellar area; (C) Complete absence of nuchal crest with a smooth external occipital surface; and (D) A smooth mental eminence with slight projection above the surrounding bone. Luca Kis in Tihanyi et al. (2024).

Examination of the skeleton of SH-63 revealed a number of signs that the individual was suffering from osteoporosis, notably bone fragility, traces of a reduced trabecular system in the vertebrae, an increased diameter of the medullary cavity in the long bones, thinning of cortical bone in both the skull and postcranial elements, and several antemortem bone fractures. Since osteoporosis is a condition which predominantly affects older women, this could be another indication that SH-64 was female, although Tihanyi et al. are careful to note that the observed conditions are only indicators of the disease, not enough for an absolute diagnosis. Previous studies of skeletons at Sárrétudvari–Hízófóld have found six other possible cases of osteoporosis, five affecting skeletons confidently assigned as female, and one affecting an individual of unknown sex. No instances of confidently male skeletons with symptoms of osteoporosis have been found.

The skeleton shows a number of signs of injuries having been suffered in life. These include a possible two-part neck fracture to the right humerus, an injury most commonly associated with an accidental fall onto an outstretched arm. Such injuries are most commonly seen in adolescents and the elderly, with older women suffering from osteoporosis being particularly vulnerable. 

Changes observed on the proximal end of the right humerus, at the level of the surgical neck. (A) Lateral and anterior views; (B) Anterior and medial views; and (C) Medial and posterior views. Luca Kis in Tihanyi et al. (2024).

Another fracture is present on the right scapula, with two parts of the bone having apparently healed without rejoining, producing new secondary facets which faced one-another. The left scapula also shows signs of a fracture, although in this case it appears to have healed more normally. Fractures to the scapula are unusual, and are generally associated with older individuals, as in younger people the scapula tends to be well-protected by overlaying muscle. Again, such injuries are generally associated with falls, and an individual with osteoporosis would be more vulnerable to such injuries.

Changes observed on the lateral margin of the right scapula. (A) The two separate bone fragments of the lateral margin (anterior view). Note: the glenoid cavity is in the upper left corner of the photo; and (B) The margins of the two bone fragments forming a secondary facet. Luca Kis in Tihanyi et al. (2024).

Signs of traumatic injury in life are quite common in male skeletons from Sárrétudvari–Hízófóld, but relatively unusual in females, suggesting the two sexes had very different lifestyles. Multiple injuries, and in particular injuries to the arms, are particularly common on male skeletons buried with weapons or riding equipment. Thus, although the injuries to SH-63 are consistent with a diagnosis of osteoporosis, they are also typical of the injuries seen in individuals buried with weapons and riding equipment. 

Interestingly, SH-63 also showed asymmetry in the development of the tendon and muscle attachments, with the right side being more developed than the west, sugesing a lifetime spent carrying out activities which promoted such asymmetric development. This has previously been recorded in male skeletons from Sárrétudvari–Hízófóld, and has been theorised to be associated with practice with weapons. 

The way in which SH-63 was buried is also interesting. The southwest-northeast orientation of the grave is at odds with the majority of the graves at Sárrétudvari–Hízófóld, but it is by no means unique; there are several other graves with this orientation, the majority of which are at the western end of the cemetery, where SH-63 was found. Notably, most of these other southwest-northeast orientated graves also contain weapons. SH-63 is also one of two individuals buried on one side with flexed knees at Sárrétudvari–Hízófóld; all others being buried on their backs with limbs extended. The other such individual, SH-69, has previously been determined to have been female, and was buried with a silver penannular hair ring, two bronze finger rings, and a knife, but no weapons or other potential military equipment. Some previous studies of other sites from the same period within the Carpathian Basin have suggested that bodies buried in a flexed position tend to have less grave goods than those in an extended position, and it has been proposed that such individuals may have been slaves. However, Tihanyi et al. could find no study which has caried out a systematic analysis of this phenomenon, and suggest instead that is may relate in some way to the sex of the individuals buried this way, although, since the majority of female burials are also on their backs in an extended position, it is unclear how.

(A) Silhouette of the skeleton of SH-63; (B) Illustration of the burial based on archaeological, anthropological, and archaeogenetic data. Luca Kis in Tihanyi et al. (2024).

Thus individual SH-63 appears potenrially to have been a woman both buried with, and practiced in the use of weapons, who developed a number of traumatic injuries later in life, either due to this unconventional lifestyle or to the onset of osteoperosis, or some combination of both. However, Tihanyi et al. are careful to point out that the poor preservation of SH-63 means that this interpretation cannot be taken as proven.

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