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GLOSSARY

 

Ablation The stripping or erosion of material from the surface of the (re-entry) body.
AnteriorThe front of the tektite, facing the ground/flight direction. Also termed windside.
AustralitesTektites found in Australia
Bald spotOccuring in splatform tektites on the anterior surface. The bald spot is formed by flaking of material from the edge of the tektite, due to thermal shock during re-entry. It is also possible that bald spots may also form on impact with the ground, this is particularly recognisable in dumbbells.
BikolitesA subtype of Rizalites or Philippinites. This term is applied in two senses, firstly to tektites found in the Bikol (with a k, not a c) region/peninsula of the Philippines. These tektites are characterised by large ‘breadcrust’ forms and the shells of breadcrusts exhibiting deep and prominent grooving. The term has also been applied in a broader sense to tektites from the Philippines exhibiting Bikol-like morphologies and sculpture.
Billitonites Tektites from Belitung Island, Indonesia.
BiscuitsA term commonly applied to lens shaped Philippinites.
BreadcrustA term applied to large Philippinite tektites (commonly 250g-400g) exhibiting U-grooving.
ButtonA morphology developed only in Australia (and Java). Ablated material from the anterior of the tektite cools on the posterior and forms a flange.
Dent-bentform Forms that impacted the ground and bent creating bald spots, bent forms and occasionally cracked forms.
DumbbellsA primary tektite form, created by the rotation of the molten tektite ‘blob’ forming two ‘blobs’ connected by a neck. Can be symmetrical or asymmetrical.
GuttersAnother term for U-grooves that are found primarily on, but not restricted to Philippinites and Billitonites.
ImpactitesMaterials close to, or within, the source crater. These can include melted glasses. Some ‘tektites’ such as Darwin Glass and Moung-Nong type tektites are borderline between tektite and impactite.
IndochinitesTektites from the Indochinese peninsula. In this case not in the strictest sense of the Indochinese Peninsula, but incorporating Thailand, Laos, Cambodia, Vietnam and parts of China.
Indicator formA tektite that has partially spalled, resulting in a half way from, for instance between an Australite button and core or a Philippinite breadcrust and nucleus.
JavanitesTektites from Java.
Lei-gong-moThe older or proper name for tektites found in China meaning thunder god ink-black stone. (Also lei-gong-moh and lei-gong-shih)
Malaysianites Tektites from Malaysia.
Moung NongTektites that show no form and were effectively puddles of molten liquid formed when very large molten blobs of tektite material rained down. The large size of the ‘blob’ prevented sufficient cooling to preserve the shape on impact. Often exhibiting layering, flow lines, stretched bubbles and also pentagonal cooling cracks. Exclusively occurring in the Indochinese region and questionably in the Philippines.
NavelsU-grooves that form circular shapes on the grooved side of oriented tektites from, but not restricted to, the Philippines.
OnionsA term applies to splatform teardrops that have ‘relaxed’ when they landed. The thinner part of the teardrop was more solid than the body.
PhilippinitesTektites from the Philippines. Identical to the term Rizalite, the official name for tektites from the Philippines, but avoiding the geographical confusion.
PosteriorThe back of the tektite, facing space/direction of source. Also termed leeside. 
Radial groovesGrooves radiating from a central point, very similar to starburst rays, but maintaining a constant width.
Rizalites This was the name coined by Henry Otley Beyer in his 1928 paper ‘Tektites in Luzon’. The term applies to all Philippine tektites, not just those from the Rizal Region. The name was chosen as most of the tektites found by Beyer at the time were from the Rizal region and secondly after José Rizal, for whom the province was named, who was also the first Filipino to take a serious interest in Archaeology and Natural History of his native land.     
SpallingThe spontaneous chipping, fragmentation or separation of a surface.
SplashformTektites that show no significant alteration to the original shape (no ablation or impact ‘splatting’) other than surface sculpture.
SplatformTektites that have hit the ground and either ‘splatted’ or ‘relaxed’ after impact, but retain a form. Characterisd by the onion morphology.
SpoonsSplatform or bentform type morphology where a teardrop has flattened and bent. Similar to a Chinese spoon.
Starbust RayTektites displaying numerous skin splits, exposing plastic material in the tektite interior. The skin splits are arranged in a radial fashion and are interpreted as being caused when the semi-molten tektite impacted the ground. They characteristically decrease in width away from the impact point.
Stretch tektitesThese tektites show breaks in the hard exterior, exposing the plastic interior. In order to qualify as a stretch tektite, as oppose to a starburst ray, the tektite must show a split and an angular bend.
TeardropsA primary tektite form, created when a dumbbell form was rotating at high speed, thus causing it to split in two and from teardrops.
TektitesGlassy objects of various shapes and sizes, which result from the melting of terrestrial rock by means of asteroid of comet impact. Tektites differ from impactites in that they are considered to have been ejected and ‘flown’ from the impact site.
ThailanditeA tektite from Thailand. Also broadly termed Indochinite.
U-groovesAlso termed gutters and worm tracks. These are elongate U-shaped depressions on the specimen. On oriented specimens they occur on only one side - the anterior. Common on Philippinites and Billitonites. U-grooves are thermal cracks enhanced by chemical etching in the soil.
V-groovesAs the name suggests V-grooves are V-shaped depressions. Anda subtype III exhibits V-grooves. They also occur in Moldavites and Australites. V-grooves are chemically enhanced stress-related cracks - the original micro-cracks being formed due to the rapid cooling of the glass.
Z-bendsWhen the front of a tektite strikes the ground it stops moving, but the back continues to move and wants to shear the specimen in half at 45 degrees. In elongate forms such as dumbbells this often translates into a slight bend in the middle.

  

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