lichenometry
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Lichenometry — In archeology and paleontology, lichenometry is the study of dating a surface using lichens as age markers: lichens increase in size radially as they grow. Measuring the diameter of the largest lichen on a rock surface can thus be used to… … Wikipedia
lichenometry — … Useful english dictionary
Lichen — For other uses, see Lichen (disambiguation). Lichenes from Ernst Haeckel s Artforms of Nature, 1904 … Wikipedia
Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… … Wikipedia
Map lichen — Rhizocarpon geographicum Scientific classification Kingdom: Fungi Division … Wikipedia
Anno Domini — This article is about the designation of years. For other uses, see Anno Domini (disambiguation). AD redirects here. For other uses, see AD (disambiguation). Dionysius Exiguus invented Anno Domini years to date Easter. Anno Domini (abbreviated as … Wikipedia
Calendar — For other uses, see Calendar (disambiguation). For the Gregorian calendar for this year, see Common year starting on Saturday. A page from the Hindu calendar 1871–1872. A calendar is a system of organizing days for social, religious, commercial,… … Wikipedia
Columbia River — Coordinates: 46°14′39″N 124°3′29″W / 46.24417°N 124.05806°W / 46.24417; 124.05806 … Wikipedia
Common Era — BCE redirects here. For other uses, see BCE (disambiguation). Era Vulgaris redirects here. For the Queens of the Stone Age album, see Era Vulgaris (album). Common Era (sometimes Current Era[1] or Christian Era[2]), abbreviated as CE, is an… … Wikipedia
Chronicle — For other uses, see Chronicle (disambiguation). Generally a chronicle (Latin: chronica, from Greek χρονικά, from χρόνος, chronos, time ) is a historical account of facts and events ranged in chronological order, as in a time line. Typically,… … Wikipedia
