Search results
Results from the WOW.Com Content Network
Dolomite is used as an ornamental stone, a concrete aggregate, and a source of magnesium oxide, as well as in the Pidgeon process for the production of magnesium. It is an important petroleum reservoir rock, and serves as the host rock for large strata-bound Mississippi Valley-Type (MVT) ore deposits of base metals such as lead, zinc, and copper.
Lignite (derived from Latin lignum meaning 'wood'), often referred to as brown coal, [1] is a soft, brown, combustible sedimentary rock formed from naturally compressed peat.It has a carbon content around 25–35% [1] [2] and is considered the lowest rank of coal due to its relatively low heat content.
It also contained about 20 kg (44 lb) of bronze objects along with numerous everyday objects such as nails, glass beads, parts of tools, pottery, iron bands and clasps. The treasure was found by using a metal detector, and the finders fee, given to the farmer who owned the land, was over 2 million kronor (about US$308,000). [ 29 ]
Imoti contends that there were numerous such Kaaba sanctuaries in Arabia at one time, but this was the only one built of stone. [31] The others also allegedly had counterparts of the Black Stone. There was a "Red Stone", in the Kaaba of the South Arabian city of Ghaiman; and the "White Stone" in the Kaaba of al-Abalat (near modern-day Tabala).
The longest known male tusk is 4.05 m (13.3 ft) long (measured along the outside curve) and weighs 115.5 kg (255 lb), with a historical report of a 4.30 m (14.1 ft) long tusk found in Siberia, while the heaviest tusk is 121 kg (267 lb), suggested to have been 125–130 kg (276–287 lb) when complete; [53] [54] 2.4–2.7 m (7 ft 10 in – 8 ft ...
The brain volume was quite large, measuring from 1,013 to 1,251 cubic centimetres (61.8 to 76.3 cu in), which is within the range of variation for present-day modern humans. One potentially female specimen may have been 158 cm (5 ft 2 in) tall and weighed 51 kg (112 lb); males were probably much bigger than females.
The density at the surface is 65 kg/m 3 (4.1 lb/cu ft), 6.5% that of water [88] or 50 times as dense as Earth's atmosphere at 293 K (20 °C; 68 °F) at sea level. The CO 2 -rich atmosphere generates the strongest greenhouse effect in the Solar System, creating surface temperatures of at least 735 K (462 °C; 864 °F).
By 1910, inventor Mark Barr began using the Greek letter phi ( ) as a symbol for the golden ratio. [32] [e] It has also been represented by tau ( ), the first letter of the ancient Greek τομή ('cut' or 'section'). [35] Dan Shechtman demonstrates quasicrystals at the NIST in 1985 using a Zometoy model.