Книга: Piotr Nowinski «Desert Varnish»
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Производитель: "LAP Lambert Academic Publishing" Desert varnish, or rock varnish, is a thin paint-like surface coating found on rocks everywhere, but more commonly in arid regions of the world. Often, this red-brown to nearly black coating covers light colored rock. This manganese-rich coating is also known to incorporate other elements. Dr. Nowinski`s research-directing hypotheses were 1) `could this coating hold a record of recent air pollution, in spite of its very slow growth? and 2) `could one just pick up varnished rocks and use them to identify an area impacted by point sources of air pollution`? To answer these questions, samples of varnished rocks were collected upwind and downwind of two coal-fired power plants. Several methods were employed, including destructive laser-ablation inductively coupled plasma mass spectrometry, and, non-destructive portable X-ray fluorescence spectroscopy, to analyze these coatings for up to 26 chemical elements. The results are remarkable. They show, unequivocally, that these slow-growing... ISBN:9783659665240 Издательство: "LAP Lambert Academic Publishing" (2014)
ISBN: 9783659665240 |
См. также в других словарях:
Desert varnish — in Horseshoe Canyon, Canyonlands National Park, Utah. Desert varnish, or rock varnish is a orange yellow to black coating found on exposed rock surfaces in arid environments. Desert varnish is usually around one micron thick and present nanometre … Wikipedia
desert varnish — the dark, lustrous coating or crust, usually of manganese and iron oxides, that forms on rocks, pebbles, etc., when exposed to weathering in the desert. Also called desert polish. [1900 05] * * * or patina Thin, dark red to black mineral coating… … Universalium
desert varnish — noun or desert polish : a dark coating or polish found on rocks and pebbles after long exposure in desert regions … Useful english dictionary
desert varnish — (not preferred) refer to rock varnish … Glossary of landform and geologic terms
desert varnish — noun Date: circa 1898 a dark coating which is found on rocks after long exposure in desert regions and whose color is due to iron and manganese oxides … New Collegiate Dictionary
desert varnish — /ˈdɛzət vanɪʃ/ (say dezuht vahnish) noun a dark coating, composed principally of fine grained clay minerals, found on rocks or stone in arid regions …
