Датотека:"Liesegang banding" in quartzose sandstone (Upper Paleozoic; quarry near Crossville, Tennessee, USA) 2 (40280403530).jpg
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Opis"Liesegang banding" in quartzose sandstone (Upper Paleozoic; quarry near Crossville, Tennessee, USA) 2 (40280403530).jpg |
“Liesegang banding” in sandstone from the Upper Paleozoic of Tennessee, USA. Irregular, reddish or brownish or orangish-brown iron oxide banding is commonly seen in many porous rocks, particularly sandstones and pebbly sandstones. These have been almost universally referred to as “Liesegang banding”, representing precipitation lines of iron-rich minerals (e.g., hematite, limonite, goethite, etc.) at & along groundwater chemical interfaces. But, according to Neil Wells of Kent State University, the original concept of Liesegang banding (Liesegang, 1896) does not match up with what is seen in the rock record (see Wells et al., 2003). True Liesegang banding refers to parallel bands of precipitate formed by diffusion along a single chemical gradient during one event. What's seen in the rock record often consists of sets of irregularly concentric iron bands, with different sets of bands quite frequently oriented in different directions, and showing cross-cutting and dissolution of older sets. Iron banding in the rock record is clearly the result of numerous precipitation events over long periods of time by moving groundwater (Wells et al., 2003). Iron mineralization along these bands appears to be induced by the presence of either a redox interface (change from reducing to oxidizing conditions in the groundwater) or a pH interface (change in acidity). Because Neil Wells is the first (apparently) to point out that what geologists have been calling Liesegang banding really isn’t, a renaming seems to be in order. It was jokingly suggested in 2003 that the iron banding discussed above be called “Wells Banding”. I’m all for that. From Diemer et al. (2012) - Building Stone Walking Tour of Uptown Charlotte: The 1.5 acre urban pocket park known as the Green is located between the 400 block of South Tryon and South College Streets, immediately west of the Charlotte Convention Center. Designed by Wagner Murray Architects of Charlotte, it was completed in 2002 and sits directly on top of a 7-level underground parking structure. Sandstone blocks in the retaining wall This fine-grained quartz sandstone was quarried near Crossville, Tennessee. Red iron staining highlights cross-bedding on some specimens. The high quartz content of this sandstone, deposited along the coast of an inland sea that covered most of North America in the Mississippian, about 340 million years ago, has made it a desirable and durable building stone. It is called a fieldstone because it has been left in its natural state. Provenance: quarry near Crossville, Cumberland County, east-central Tennessee, USA Locality: building stone in wall at "The Green", College Street & 2nd Street, downtown Charlotte, North Carolina, USA References: Liesegang, R.E. 1896. Ueber einige Eigenschaften von Gal-lerten [On some properties of gelatin]. Naturwissenschaftliche Wochenschrift 11: 353-362. (see also: Liesegang, R.E. 1945. Geologische Bänderungen durch Diffusion und Kapillarität [Geologic banding by diffusion and capillarity]. Chemie der Erde, Zeitschrift der Chemischen, Mineralogie, Petrographie, Geologie und Bodenkunde 15: 420-423.) Wells, N.A., D.A. Waugh & A.M. Foos. 2003. Some notes and hypotheses concerning iron and iron remobilization features in the Sharon Formation (Summit County, Ohio). in Pennsylvanian Sharon Formation, past and present: sedimentology, hydrogeology, and historical and environmental significance, a field guide to Gorge Metro Park, Virginia Kendall Ledges in the Cuyahoga Valley National Park, and other sites in northeast Ohio. Ohio Division of Geological Survey Guidebook 18: 33-37. |
Datum | |
Izvor | "Liesegang banding" in quartzose sandstone (Upper Paleozoic; quarry near Crossville, Tennessee, USA) 2 |
Autor | James St. John |
Licenciranje
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40280403530 (archive). It was reviewed on 6. decembar 2019. by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6. decembar 2019.
Natpisi
Stavke prikazane u ovoj datoteci
prikazuje
Neka vrednost bez stavke na projektu Vikipodaci
status autorskog prava Serbian (transliteracija)
zaštićeno autorskim pravima Serbian (transliteracija)
3. novembar 2012
izvor datoteke Serbian (transliteracija)
file available on the internet English
model kamere Serbian (transliteracija)
Canon PowerShot D10 English
vreme ekspozicije Serbian (transliteracija)
0,003125 sekunda
žižna razmera Serbian (transliteracija)
8
žižna daljina Serbian (transliteracija)
6,2 milimetar
ISO brzina Serbian (transliteracija)
80
image/jpeg
kontrolna suma Serbian (transliteracija)
1f20a845a5cb92790285f0fc43f16502fca278ca
veličina podatka Serbian (transliteracija)
5.311.171 bajt
visina Serbian (transliteracija)
2.535 piksel
širina Serbian (transliteracija)
3.993 piksel
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Datum/vreme | Minijatura | Dimenzije | Korisnik | Komentar | |
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trenutna | 05:13, 6. decembar 2019. | ![]() | 3.993 × 2.535 (5,07 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Proizvođač kamere | Canon |
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Model kamere | Canon PowerShot D10 |
Ekspozicija | 1/320 sek. (0,003125) |
F broj | f/8 |
ISO osetljivost na svetlo | 80 |
Datum i vreme slikanja | 13:42, 3. novembar 2012. |
Žarišna daljina sočiva | 6,2 mm |
Naziv slike | |
Širina | 4.000 p |
Visina | 3.000 p |
Dubina boje |
|
Sastav piksela | RGB |
Orijentacija | Normalno |
Broj delova | 3 |
Vodoravna rezolucija | 180 tpi |
Vertikalna rezolucija | 180 tpi |
Korišćeni softver | Adobe Photoshop Elements 13.0 (Macintosh) |
Datum i vreme poslednje promene datoteke | 15:25, 13. maj 2018. |
Položaj Y i C | Uporedo |
Exif verzija | 2.21 |
Datum i vreme digitalizacije | 13:42, 3. novembar 2012. |
Značenje svakog dela |
|
Režim sažimanja slike | 3 |
Brzina zatvarača | 8,3125 |
Otvor blende | 6 |
Kompenzacija ekspozicije | 0 |
Najveći broj otvora blende | 2,96875 APEX (f/2,8) |
Režim merača | Matrični |
Blic | Blic nije aktiviran, obavezno bez blica |
Podržana verzija FlashPix-a | 1 |
Prostor boje | sRGB |
Rezolucija fokusne ravni X | 16.460,905349794 |
Rezolucija fokusne ravni Y | 16.483,516483516 |
Jedinica za rezoluciju fokusne ravni | inči |
Način senzora | Jednokristalni matrični senzor |
Izvorna datoteka | Digitalni fotoaparat |
Prilagođena obrada slika | Normalan proces |
Režim ekspozicije | Automatska ekspozicija |
Bela ravnoteža | Automatska bela ravnoteža |
Odnos digitalnog uveličanja | 1 |
Tip snimanja scena | Pejzaž |
Korišćeni objektiv | 6.2-18.6 mm |
Datum poslednje izmene metapodataka | 11:25, 13. maj 2018. |
Jedinstveni ID izvornog dokumenta | ECD50709369F733F175420C735D1217E |