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Flow
Model / Mua / Stylist: Terfa Mazlom
Photographer / Retoucher: Kaa Dahl (DmansirPhotography)
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Found below quarry face. Photoed in water. The banding is reportedly caused by friction and cooling near the edge of the lava vent. Mattapan, MA 3/16/12
steel, water, hand-pump, light beacons
60’ x 33’ x 45'
2009
Sabine Water Pump Station and Buffalo Bayou Park, Houston, Texas
City of Houston Art Collection
Partly located inside the Houston Sabine Water Pump Station fence and partly outside the fence in Buffalo Bayou Park (and a few hundred feet from the public skateboard park) Open Channel Flow mimics in style and color much, much smaller structures that dot the Pump Station landscape. By using the stainless steel hand-pump one can experience a refreshing “shower” as water rains down from the showerhead 25 feet above. Simultaneously, and as a result of pumping water through the pipes, yellow and blue beacons on top of the 60-foot structure flash, signaling people as far away as downtown that another person has doused themselves with a refreshing, albeit very brief, shower.
Metakomatiite (serpentinized) in the Precambrian of Ontario, Canada. (this outcrop is bleached to prevent growth of vegetation; stratigraphic up is to the left; this is a NO HAMMER locality)
Komatiites are very rare, magnesium-rich, extrusive, ultramafic igneous rocks. They are named after the Komati River Valley in South Africa, the type locality. Komatiite is an exceedingly rare type of lava. No volcano on Earth erupts this material today. Komatiites are essentially restricted to the Archean (4.55 to 2.5 billion years ago). Experimental evidence has shown that komatiite lavas, when originally erupted, were considerably hotter (~1600º C) than any modern lava type on Earth. This indicates that Earth’s mantle was much hotter than now. Other geologic evidence also indicates that early Earth’s heat flux was much higher than today’s.
Komatiite lava had a very low viscosity - it could flow like an ultradense gas. This property permitted the solidification of some individual lava flows that are only 1 cm thick.
The classic texture of komatiites is spinifex texture, named after clumps of long, spiky (& painful!) grasses. Komatiites with spinifex texture have short to long blades or plates of olivine mixed with smaller-scale blades of pyroxene.
All Archean komatiites are metamorphosed - the original igneous mineralogy (olivine, pyroxene, minor chromite, etc.) is gone to mostly gone. Such rocks are best termed metakomatiites, but the prefix “meta-” is usually not specified in writing.
Komatiites have economic significance, as many are closely associated with copper-nickel minerals (chalcopyrite & pentlandite), plus minor platinum-group elements, arsenides, bismuthides, and maybe a little gold and silver. Komatiites are a world-class source of nickel in Canada and Western Australia.
The outcrop seen here is part of a stack of tectonically-tilted, nearly vertical, komatiite lava flows at Pyke Hill, Ontario, Canada. The original olivine spinifex texture is serpentinized for the most part. Pyroxene spinifex consists of small, felted needles. Cumulate-textured units are also present in these lava flows, plus knobby peridotite units and brecciated or cooling-cracked flow tops.
Pyke Hill is a world-famous locality for komatiites. The rocks there are part of the Kidd-Munro Assemblage, which consists of ultramafic and mafic volcanic rocks intruded by mafic to ultramafic dikes and sill-like bodies. Minor felsic volcanic rocks are also present. Volcanogenic massive sulfide deposits occur in the Kidd-Munro Assemblage - they have been mined at the Texas Gulf Mine and the Potter Mine.
The peridotites at Pyke Hill are 37 to 45% silica. Spinifex-textured rocks here are 42 to 45% silica. The chromium (Cr) content ranges from 1500 to 5000 parts per million in the peridotite and spinifex-textured rocks. Nickel (Ni) content ranges from 400 to 2000 parts per million.
Stratigraphy: Upper Komatiitic Unit, Kidd-Munro Assemblage, Abitibi Greenstone Belt, lower Neoarchean, 2.711-2.719 Ga
Locality: Pyke Hill outcrop - hillside exposures on the northwestern part of Pyke Hill, east of the Potter Mine, north of Route 101, east-northeast of Matheson & south of the western end of Lake Abitibi & ~83 kilometers east of the city of Timmins, Munro Township, southern Cochrane District, eastern Ontario, southeastern Canada (vicinity of 48° 35' 55.78" North latitude, 80° 12' 00.05" West longitude) (= locality 1b (“Fragile Spinifex exposures”) on the northwestern corner side of Pyke Hill of Fyon & Green, 1991 - Geology and ore deposits of the Timmins District, Ontario (field trip 6), Geological Survey of Canada Open File 2161, p. 27 (fig. N12).)
Aufgenommen am 01.04.13 in Hinte (Niedersachsen). Exifs : 1/320 s | f/3.2 | Iso 100 | 50mm | NIKON D7000 .
Just another flower from the Anna Scripps Whitcomb Conservatory at Belle Isle, in Detroit, Michigan.
I highly recommend this place if you are visiting the Detroit area.
Jungfru Marie nycklar är en ofta tämligen högväxt orkidé som kan bli nästan en halv meter hög. Bladen är ganska breda och trubbiga med en största bredd i eller framför mitten, vanligen blågrönaktiga på undersidan och med tydliga mörka fläckar på ovansidan. Jungfru Marie nycklar blommar i juni-juli, blommorna är mörkt till ljust rosa, ibland vitaktiga och sitter i en tät blomställning, som kan vara jämnbred eller mer eller mindre spetstoppig