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Lepidolite is associated with other lithium-bearing minerals like spodumene in pegmatite bodies. It is the major source of the alkali metal rubidium. [13] In 1861, Robert Bunsen and Gustav Kirchhoff extracted 150 kg (330 lb) of lepidolite to yield a few grams of rubidium salts for analysis, and therefore discovered the new element rubidium. [14 ...
The oldest message in a bottle ever found was 131 years and 223 days old when it was discovered, Guinness World Records said in a statement. Australians Tonya and Kym Illman found the message on ...
The Ljubljana Marshes Wheel is a wooden wheel that was found in the Ljubljana Marsh some 20 kilometres (12 mi) south of Ljubljana, the capital of Slovenia, in 2002. [1] Radiocarbon dating , performed in the VERA laboratory ( Vienna Environmental Research Accelerator ) in Vienna , showed that it was approximately 5,100 to 5,350 years old, which ...
The history of glass-making dates back to at least 3,600 years ago in Mesopotamia. However, most writers claim that they may have been producing copies of glass objects from Egypt. [1] Other archaeological evidence suggests that the first true glass was made in coastal north Syria, Mesopotamia or Egypt. [2]
[9] [18] The majority of furniture in Sumeria was made of wicker wood. [19] Storage chests were common. Chests could be made from reed or wood. Some were elaborately carved. [12] [20] [21] Stools, tables, and reed mats were also common. Tables were used to hold meals or belongings. Wealthy Mesopotamians would decorate their tables with metals.
Granite requires a water content of 4 wt% at a pressure of 0.5 GPa (72,500 psi), but only 1.5 wt% at 0.1 GPa (14,500 psi) for phase separation to take place. [14] The volatiles (primarily water, borates, fluorides, chlorides, and phosphates) are concentrated in the hydrous phase, greatly lowering its viscosity. [5]
The age of bog-wood found in Croatian rivers ranges from several hundred years in the southern rivers to the oldest retrieved so far, from the Krapina River, dated at 8290 years old. [1] In Serbia, bog-wood over 8,000 years old is found in the valleys of the Danube River, Sava River and their tributaries, primarily in the province of Vojvodina.
Glass is made from silica and a variety of other components that gives the glass color. Glass, usually, is also referred to the most stable of archaeological materials, but glass artifacts, and glass from the 17th century can go through complex disintegration. Normally glass consists of 70% to 74% silica, 16% to 22% alkali and 5% to 10% of flux.
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