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Verrucaria Funckii
''Verrucaria funckii'' is a species of saxicolous lichen, saxicolous (rock-dwelling), semi-aquatic, crustose lichen in the family Verrucariaceae. It occurs on inundated or submerged rocks (typically siliceous rocks) and pebbles in streams and lakeshores. It is widespread in Europe, including Northern Europe and Iceland, central Europe including the Carpathians and the Alps, and southern Europe. It is also found in Asia and North America. The lichen was first species description, formally described in 1826 by Kurt Polycarp Joachim Sprengel, as a species of ''Pyrenula''. The botanical name, species epithet honours German botanist Heinrich Christian Funck, who published the taxon in his series ''Kryptogamische Gewächse des Fichtelgebirges'' ("Cryptogamous plants of the Fichtel Mountains"). Alexander Zahlbruckner transferred the taxon to the genus ''Verrucaria'' in 1922. ''Verrucaria funckii'' is an example of a ; that is, a lichen in which the partner is yellow-green algae (class ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzite
Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of hematite. Other colors, such as yellow, green, blue and orange, are due to other minerals. The term ''quartzite'' is also sometimes used for very hard but unmetamorphosed sandstones that are composed of quartz grains thoroughly cemented with additional quartz. Such sedimentary rock has come to be described as orthoquartzite to distinguish it from metamorphic quartzite, which is sometimes called metaquartzite to emphasize its metamorphic origins. Quartzite is very resistant to chemical weathering and often forms ridges and resistant hilltops. The nearly pure silica conte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
