#Liesegang rings
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Prehistoric ancestor of the corn chip
Hey geology guys
Why?
#at first glance without knowing the area or seeing the rock up close#I'd say either a xenolith or an odd pattern of weathering#more likely weathering given the shape of the rock#actually probably liesegang rings broken off at an odd angle
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Liesegang Rings at Bouddi National Park, New South Wales, Australia / Journey to Bouddi National Park and discover the mysterious and enchanting Liesegang Rings. These captivating geological formations are a testament to the wonders of nature's creative forces.
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Liesegang Rings at Bouddi National Park, New South Wales, Australia /
Step into tranquility and be captivated by the mesmerizing Liesegang Rings at Bouddi National Park. Marvel at this unique geological phenomenon found in the heart of New South Wales, Australia.
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Liesegang Rings at Bouddi National Park, New South Wales, Australia /
Step into tranquility and be captivated by the mesmerizing Liesegang Rings at Bouddi National Park. Marvel at this unique geological phenomenon found in the heart of New South Wales, Australia.
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sandstone at Maitland Bay by Peter Woodard Via Flickr: Terrigal Formation sandstone from the Triassic at Maitland Bay beach. On the other side of the Hawkesbury, the corresponding rocks are Newport Formation sandstone. Above them both, the Hawkesbury sandstone, all from the Triassic. Siderite is the mineral causing the colouration in these rocks, (FeCO3). I'd hoped my teenage companion would model for me in front of these rocks, but she declined.
#triassic#sandstone#Narrabeen Group of Sedimentary Rocks#sedimentary rock#boudi national park#terrigal formation#central coast#gosford#nsw#australia#hawkesbury river#maitland bay#siderite#liesegang#liesegang rings#liesegangbanding
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Liesgang rings Phenomenon
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Liesegang rings in a world-class Freisen agate
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Liesegang rings
The concentric rings are referred to as Liesegang rings/bands, which is a common feature in the weathered rocks. The rock has to be weathered for these bands form as it will free up the iron from minerals in the rock and allow water to travel through it. Once water soaks through the rock and picks up the iron it will redistribute and oxidise it forming bands like these of iron oxide.
Places where rock is unbroken the artistic Liesegang bands are formed and where there are cracks (joints), the iron oxide will concentrate along them. Hence, why we can see both, the irregular banding and straight-lined weathering features
Example from Gerringong, Australia
#geology#liesegang bands#weathering#chemical weathering#ironoxide#rock#water#joints#feature#physical geography#chemistry#science#geoscience#earth science#studyblr#study#art#abstract#natural#natural history#nature#photography#original photography#minerals#lensblr#ring#drrock
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Zwei von Millionen von Sternen
Gestern Ausflug nach Hanau. Lorenz Jäger hatte zum Abendessen geladen. Wie zu erwarten war, schlug die Stimmung gleich zu Beginn hohe Wogen, als nämlich alle Gäste da waren und von einander Kenntnis nahmen: unter anderen waren Gudrun und Hendrik gekommen, wie immer eleganter als alle zusammen und mindestens ebenso heiter, dann der Ideengeschichtler und seine Frau, ein angehender Priester aus dem Umfeld Mosebachs (auch entsprechend gekleidet, also nicht priesterlich, sondern mosebachhaft prachtvoll). Zum Auftakt tischte Lorenz eine gigantische Flasche Rosésekt auf, trug ein Gedicht vor und lud uns dann ein, gemeinsam »Stille Nacht, heilige Nacht« zu singen, freilich nicht auf Deutsch, sondern auf Bassa, der Sprache seiner Ehefrau Sophie, die aus Kamerun stammt. Um uns einen Eindruck vom Klang der Wörter dieser Sprache zu geben, sang Sophie die erste Strophe allein vor. So eine Stimme hatte ich noch nie gehört. So eine Sprache auch nicht. Die Melodie dafür schon Hunderte Male. Durch diese Kombination von Fremdem und Vertrautem erwachte das scheinbar altbekannte Weihnachtslied für mich zum Leben. Das heißt, es ging mich plötzlich etwas an. Das hatte auch damit zu tun, dass Lorenz nicht nur den Text auf Bassa ausgeteilt hatte, sondern auch dessen Übersetzung ins Deutsche, die keineswegs exakt der deutschen Fassung entsprach. Heißt die erste Zeile des Liedes auf Bassa »U u ba nlam, mbok i mom nwee«, bedeutet das eben nicht »Stille Nacht, heilige Nacht«, sondern »Die Nacht war schön, alles wurde still«.
Alsdann folgte ein exzellentes Abendessen in drei Gängen; es ging dabei eigentlich mal wieder um alles: die Macht der Sternzeichen, das Wesen der Frauen, den Roman »Michael« von Joseph Goebbels und die Totenmaske, die im Esszimmer gleich neben meinem Platz in einer Vitrine ausgestellt war. Sie zeigte das Gesicht von Raphael Liesegang, dem berühmten Kolloidchemiker und Entdecker der Liesegangschen Ringe, einem Mann, mit dessen Leben das von Lorenz auf vielfache Weise verknüpft war, wie wir am Tische nun erfahren durften.
Später nahmen Hendrik und Gudrun Joachim und mich in ihrem raumschiffhaften Wagen mit zurück nach Frankfurt. Die Autobahn führte uns durch völlige Dunkelheit zurück in die erleuchtete Stadt.
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Liesegang Rings at Bouddi National Park :: New South Wales, Australia.
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Webbed matrix of Iron concretions formed a very wavy Liesegang banding deposit, over time upwelling of air from this wet section of Red River Gorge let the sandstone weather to begin exposing the banding. As water also found its way through the rock, taking the path of least resistance, these holes became more pronounced leading to what you see in this image.
Much of the banding you see at Red River Gorge and other area’s where sandstone forms with sea bed cross bedding will take on many different patterns of Iron oxide Liesegang rings/banding In ways similar to this.
Red River Gorge specifically has one member that holds the largest amount of banding. This Member is the Corbin member, part of the Pennsylvanian Lee formation.
Normal banding progresses in more ring patterns or liniar strata as cross bedding occurs.
Exposed normalbanding on roof and side of rock shelter in Copperas Creek.
A closer look at the exposed roof as one solid layer.
band forming the shape of ripples in bed cross bedding.
Seap in sandstone.
Magnesium and Iron staining a shelf a purplish brown.
#Kentucky#geology#Red River Gorge.#sandstone#corbin member#lee formation#pennsylvanian era#banding#iron banding#iron oxide#magnesium shelf#concretion#liesegang banding#sand deposits as sea#inland sea fades#river delta forms#cuts sand through to slade member#some areas collapse exposing mammoth cave lime#thats the gorge for ya
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From Earth Science Picture of the Day; February 21, 2017:
Liesegang Phenomenon in a Granite Panel Photographer and Summary Author: Dale Chadwick
This photo of a granite panel (left photo) in a walk-in shower appears to demonstrate the Liesegang phenomenon. This phenomenon was described more than a century ago and was of intense interest to scientists in many different fields early in the 20th century. Note the dark area across the bottom of the left image, a xenolith, about 6 in (15 cm) across, just above the tiling. Above this area, there are at least three linear arcs that are slightly darker than their background. They're roughly marked on the photo at right. Some of the molecules from the darker area must have diffused into the granite while it was in a molten state and reacted with it to form the arcs or rings. The panel used in the shower was cut out from a piece of granite containing a much larger diffusion region. Photo taken on January 11, 2017.
Related Links
Boreal Forest Rings
Dale's Website
Student Links
Exploring Geochemistry in the Classroom
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Liesegang Rings, Bouddi National Park, New South Wales, Australia.
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https://www.researchgate.net/publication/316940479_Concentric_Archetype_and_Liesegang_Rings
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