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Tim -"Jeero why are you stomping your bow tie?'
Jerro- "Because it is my falters."
Tim- "What is Jeero?"
Jeero- "We didn't get our invitationers to the Royalers Wedding."
Tim - "How Come?"
Jeero- "Me and Kate had a thing a whilers back. When I brokers it offers. She went all mentalers on me. I had to movers to get aways fromers her. I thinkers she is holding a grudgers."
These fault may represent 'soft-sediment' deformation related to dewatering of the sandstone - opinions differ. No broken grains may be observed along the faults, it looks like grains have rolled instead of fractured.
It rained last night. Not too much ice, but it was cold enough to freeze on the roof of the car this morning. Made some neat patterns.
Arched and grooved (striae) slickensided fault surfaces, Sacsayhuamán, Cusco, Peru
GABELMAN, JOHN W. (1968): Structure and Origin of El Rodadero, Cuzco, Peru
Division of Raw Materials, U. S. Atomic Energy Commission, Washington, D. C. 20545
El Rodadero at Cuzco, Peru, is a diorite porphyry boss transgressing limestone. The outcrop is an arched slickensided surface, which in detail is a mosaic of smaller slickensided arches. Structural mapping disclosed that each arch caps a joint block. Prominent high-angle northwest and northeast joint sets form rectangular joint blocks. Toward the southern margin, the northwestern set is locally supplemented by east-west and north-south joints. Evidence for a low-angle joint set parallel to the roof consists of the slickensided surfaces and flow layering indicated by parallel plagioclase and ferromagnesian phenocrysts. Most bounding joints are strong open fractures often filled with hydrothermal products; interior joints are rare and tight. The top of each joint block is arched and slickensided identically. Each arch is a tight doubly plunging fold terminating at the bounding joint.
Arches are interpreted to have formed by the continued upward movement of still plastic interior magma after the capping border zone had partially chilled. Joints must have formed before the border zone completely solidified. The confinement of each fold to its own joint block suggests each block expanded independently upward in the mosaic of rising blocks. One block broke through the roof and became a breccia pipe. Differential movement between passive roof and active chilled border could have formed the slickensides. Slight north-eastern elongation of the boss chamber may have controlled the identical orientation of all major fold axes and slickensides.
CARLOTTO, V., CARDÉNAS, J. y CARLIER, G., (2011): - Geología del Cuadrángulo de Cusco 28-s - 1:50 000. INGEMMET, Boletín, Serie A: 138.
El Rodadero de Sacsayhuaman, en Cuzco, Perú, es una apófisis de un stock cenozoico de pórfido diorítico con augita, intruido en lutitas, yesos y calizas del Albiense-Turoniense. Esta apófisis, de unos 200 m de diámetro, muestra superficies pulidas y acanaladas que cubren casi todo el afloramiento de diorita y constituyen una serie de resbaladeros naturales en forma de tobogán, de donde deriva su nombre.
El pórfido diorítico de El Rodadero es una roca maciza densa de grano fino y textura granular, distinguiéndose cristales de coloración oscura de augita y pequeños agregados de epidota, generalmente bastante alterados, de modo que la augita, la plagioclasa y la ortosa (escasa) están respectivamente reemplazadas por clorita, tremolita, epidota, prehnita, calcita y sericita. Los minerales accesorios están son titanita, apatito e ilmenita.
El origen de las estrías de El Rodadero es muy discutido, existiendo varias teorías, sin embargo, predominan las que proponen un fenómeno de espejos de falla por arqueamiento diferencial de los bloques entre la roca encajante y el borde del plutón.
El afloramiento es una superficie a modo de espejo de falla arqueado y estriado, que en detalle es un mosaico de espejos arqueados más pequeños. Cada espejo arqueado ocupa la parte superior de un bloque de fractura. Estos bloques están delimitados por una red rectangular de fracturas de orientación NW y NE. En el margen sur del stock se observa también que la familia de orientación NW está acompañada por fracturas E-W y N-S. Existe otra familia de diaclasas de bajo ángulo, paralelas al techo de la cúpula magmática, como demuestran los espejos de falla y una estratificación magmática de flujo, evidenciada por la orientación de plagioclasas y ferromagnesianos.
Las fracturas abiertas que delimitan los bloques están rellenas por materiales hidrotermales, pero las diaclasas internas son raras y están cerradas. Cada bloque culmina en un espejo de falla arqueado idéntico, cuya forma es la de un pliegue apretado cuyos flancos limitan con los bloques adyacentes.
El origen de las estrías de El Rodadero es muy discutido, existiendo varias teorías, sin embargo, predominan las que se deberían a un fenómeno de espejos de falla por arqueamiento diferencial de los bloques, entre las calizas y el borde del stock.
Se interpreta que los arcos se formaron por el continuo ascenso del magma interno, aún plástico, del plutón, mientras la zona marginal ya estaba parcialmente consolidada.
Las fracturas deben haberse formado antes de que la zona marginal solidificase por completo. Cada arco de fractura está confinado en un bloque, lo que sugiere que cada bloque se expandió independientemente dentro del mosaico de bloques ascendentes.
Uno de los bloques atravesó la cúpula del plutón y formó una chimenea de brecha magmática. Los espejos de falla arqueados pudieron originarse por la fricción entre la cúpula magmática pasiva y el bloque ascendente cuyo margen era todavía plástico.
El ligero alargamiento nororiental de la cámara del stock puede haber controlado la orientación idéntica de los principales ejes de pliegue y espejos de falla.
Experimenting with slight variations of film speed.
Film: Ilford HP5+
Developer: Ilfotec LC-29 1+19
Time: 8:10 @ 20C
Wasserbillig is a lovely village on the River Mosselle. It has territory in France, Luxembourg and Germany. A tax man's nightmare!
Front Camera
No doubt about the location of the fault here. Unfortunately the fault doesn't look like much here.
The Salton Sea area is one of the southernmost locations where it is possible to see the trace of the San Andreas fault. It is not as clear as in the Carrizo Plain but it is possible to follow an alignment in the field that marks the boundary between rocks of different colors. In this picture, taken while looking south along the fault, the orange rocks are west of the fault while the tan badlands in the background are east of the fault. Of course the ephemeral streams that cut through these valleys are not bothered by the tectonic history of the area and carry their sediment across the fault and onto the Salton Sea depression.
Mecca, California
Plenty detail, zoom in and see.
We had it tough in our coalfield compared to most others, that's why Lancashire mining engineers became so highly skilled and developed so many technical advances of national importance. Dealing with faults from a few inch to 600 yards was all part of the challenge, or the "art of mining".
Plan drawn up in 1958 for H.E.Clegg's Presidential address to the Manchester Geological Society Branch of the Institute of Mining Engineers (Vol 117 Part 2)
180 deg Panoramic, North-West view from Tebing Keraton to Tangkuban Perahu volcano (covered by cloud). Located +/- 6 km to the North from Bandung city, just on the edge of Lembang Fault.
If you listen to the stream
You may get thirsty
If you watch the dying tree
You may feel weak
But don't you feel sorry
Don't you get worried
Please don't at all
Don't you take pity
It's my own fault
Hossein Valamanesh
Sandstone, wood and bronze sculpture, 1996
Riverside Quay, Southbank (Melway ref. 1A, J12)
Hossein Valamanesh was born in Tehran, Iran, in 1949 and arrived in Australia in 1970. His distinguished career has involved national and international solo exhibitions across a variety of mediums.
Originally, his Fault Line, created for its Southbank site, comprised a 70-metre granite path to the river’s edge, a derelict wooden jetty, a sandstone-veneer ‘ruin’ and two bronze half-figures and a rowboat. The sculpture reflected Valamanesh’s abiding interest in memory, destruction and survival.
Fault Line was partially decommissioned in 2007. By then, the two figures had already been irreparably damaged and were removed, and the sandstone ‘ruin’ at the southern extremity had become impossible to maintain and keep safe. The regrettable decision was made to decommission these elements of the work, along with the bronze rowing boat and single oar that had not been stolen. In an effort to retain some presence of the ‘ruin’, a trace of its plan was made using the original sandstone. This memory trace is flush with the surrounding ground surface. The boat and remaining oar have been stored offsite.
Photograph by Louis Porter