For example, sedimentary rock shale becomes slate when heat and pressure are added.
Its industries are mainly in construction and maintenance with the presence of major international groups: the furnace SETAO, Colas, , , and Swiss.
There are also mosques.
Name of Method Age Range of Application Material Dated Methodology Radiocarbon 1 - 70,000 years Organic material such as bones, wood, charcoal, shells Radioactive decay of 14C in organic matter after removal from bioshpere K-Ar dating 1,000 - billion of years Potassium-bearing minerals and glasses Radioactive decay of 40K in rocks and minerals Uranium-Lead 10,000 - billion of years Uranium-bearing minerals Radioactive decay of uranium to lead via two separate decay chains Uranium series 1,000 - 500,000 years Uranium-bearing minerals, corals, shells, teeth, CaCO 3 Radioactive decay of 234U to 230Th Fission track 1,000 - billion of years Uranium-bearing minerals and glasses Measurement of damage tracks in glass and minerals from the radioactive decay of 238U Luminescence optically or thermally stimulated 1,000 - 1,000,000 years Quartz, feldspar, stone tools, pottery Burial or heating age based on the accumulation of radiation-induced damage to electron sitting in mineral lattices Electron Spin Resonance ESR 1,000 - 3,000,000 years Uranium-bearing materials in which uranium has been absorbed from outside sources Burial age based on abundance of radiation-induced paramagnetic centers in mineral lattices Cosmogenic Nuclides 1,000 - 5,000,000 years Typically quartz or olivine from volcanic or sedimentary rocks Radioactive decay of cosmic-ray generated nuclides in surficial environments Magnetostratigraphy 20,000 - billion of years Sedimentary and volcanic rocks Measurement of ancient polarity of the earth's magnetic field recorded in a stratigraphic succession Tephrochronology 100 - billions of years Volcanic ejecta Uses chemistry and age of volcanic deposits to establish links between distant stratigraphic successions Table 1.
The product of the decay is called the daughter isotope.
However, the intermediate decay steps to get to that stable end product are useful for dating as well.
The project has three phases at a cost of 125 billion CFA francs for a long loop of 32 km.
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