By W. O’Reilly BSc, PhD, MInstP (auth.)
The earlier 20 years have witnessed a revolution within the earth sciences. The quantitative, instrument-based measurements and actual types of. geophysics, including advances in know-how, have considerably remodeled the best way the Earth, and particularly its crust, is defined. The examine of the magnetism of the rocks of the Earth's crust has performed a big half during this transformation. Rocks, or extra particularly their constituent magnetic minerals, may be considered as a measuring tool supplied by way of nature, which are hired within the carrier of the earth sciences. hence magnetic minerals are a recording magnetometer; a goniometer or protractor, recording the instructions of flows, fields and forces; a clock; a recording thermometer; a place recorder; astrain gauge; an device for geo logical surveying; a tracer in climatology and hydrology; a device in petrology. No device is linear, or unfastened from noise and systematic error, and the functionality of nature's device needs to be assessed and authorized. This has been the duty of the examine employee in rock and mineral magnetism.
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