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(28)
Magnificent
Biography
Gender:
Female
Age:
28
Ethnicity:
Mixed
Nationality:
Magnificent
Hair color:
Light brown
Hair Length:
Long
Eye color:
Gray
Height:
178 cm
Weight:
62 kg
Sexual Orientation:
Bisexual
Services Offered For:
Men
Couples
2+
Dress size:
XS
Shoe size:
40
Cup size:
A
Breast:
Silicone
Pubic hair:
Shaved mostly
Tattoo:
No
Piercings:
No
Smoking:
Occasionally
Drinking:
Occasionally
Languages:
English
Portuguese
Chinese
Indian
Turkish
Available for:
Incall: Private apartment
Outcall: Hotel visits only
Services

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Argon–argon dating

Potassium, an alkali metal, the Earth's eighth most abundant element is common in many rocks and rock-forming minerals. The quantity of potassium in a rock or mineral is variable proportional to the amount of silica present. Therefore, mafic rocks and minerals often contain less potassium than an equal amount of silicic rock or mineral. Potassium can be mobilized into or out of a rock or mineral through alteration processes. Due to the relatively heavy atomic weight of potassium, insignificant fractionation of the different potassium isotopes occurs.

Potassium—argon dating , abbreviated K—Ar dating , is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the product of the radioactive decay of an isotope of potassium K into argon Ar. Potassium is a common element found in many materials, such as micas , clay minerals , tephra , and evaporites. In these materials, the decay product 40 Ar is able to escape the liquid molten rock, but starts to accumulate when the rock solidifies recrystallizes. The amount of argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors.

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K–Ar dating

The older method required splitting samples into two for separate potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes. The sample is generally crushed and single crystals of a mineral or fragments of rock hand-selected for analysis. These are then irradiated to produce 39 Ar from 39 K. The sample is then degassed in a high-vacuum mass spectrometer via a laser or resistance furnace. Heating causes the crystal structure of the mineral or minerals to degrade, and, as the sample melts, trapped gases are released.

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