View allAll Photos Tagged zigzag
Floris Jespers - Zigzag.
Exposition at Campo & Campo (Berchem, Belgium).
My first completed quilt (note - definitely not the first quilt I've started!). I used Crazymomquilt's zigzag pattern and Oh Fransson's binding tutorial - both absolutely fabulous!
ahappystitch.com/2012/06/03/zigzag-quilt/";
made using the tutorial on "a quilt is nice" and blogged on a happy stitch
While I was in Amsterdam I went to visit Ewald Spieker studio. His work is amazing , you can see more at his website "http://www.ewaldspieker.nl" [url='http://www.ewaldspieker.nl']www.ewaldspieker.nl[/url]
zigzag Kro
ontwerp:micheltaanman
uitvoering:michel taanman/van dik hout decor
contact:micheltaanman1@mac.com
06-53386198
Mount Everest Base Camp to Tingri (Shegar), Tibet
www.google.ca/maps/dir/Tingri,+Xigaze,+Tibet,+China/Evere...
Mount Everest Base Camp to Tingri (Shegar), Tibet
www.google.ca/maps/dir/Tingri,+Xigaze,+Tibet,+China/Evere...
Mount Everest Base Camp to Tingri (Shegar), Tibet
www.google.ca/maps/dir/Tingri,+Xigaze,+Tibet,+China/Evere...
Novaculite in the Paleozoic of Arkansas, USA.
Metamorphic rocks result from intense alteration of any previously existing rocks by heat and/or pressure and/or chemical change. This can happen as a result of regional metamorphism (large-scale tectonic events, such as continental collision or subduction), burial metamorphism (super-deep burial), contact metamorphism (by the heat & chemicals from nearby magma or lava), hydrothermal metamorphism (by superheated groundwater), shear metamorphism (in or near a fault zone), or shock metamorphism (by an impact event). Other categories include thermal metamorphism, kinetic metamorphism, and nuclear metamorphism. Many metamorphic rocks have a foliated texture, but some are crystalline or glassy.
Novaculite is a local name in Arkansas for metachert (= metamorphosed chert). The physical properties of chert and metachert are quite similar (in some cases, not distinctive at all) - hard, dense, relatively smooth surfaces, sharp broken edges, and conchoidal fracture. The metamorphism involves recrystallization of the chert's microscopic quartz grains.
Information given about Arkansas novaculite invariably mentions its use as a whetstone, which is a sharpening stone for knives. This is not a geologic definition. So, prima facie, “novaculite” shouldn't be a geologic term.
It turns out that metachert in Arkansas is distinctly, but variably, microporous. This is what makes novaculite different from ordinary chert. The texture, look, and feel of most novaculite is indeed different from chert. Some Arkansas novaculite is not microporous, and is exactly like non-metamorphosed chert. Most novaculites, however, are somewhat rough, even on cut surfaces. The roughness is a consequence of the microporosity. All that said, I’d still prefer to ditch the term “novaculite” and use “metachert” instead. A rose by any other name is still a rose.
Arkansas novaculites are composed of quartz grains that range from about 5 to 20 microns in size.
Stratigraphy: Arkansas Novaculite, Middle Devonian to upper Lower Mississippian
Locality: next to trailhead for Shortcut Trail, near the crest of Hot Springs Mountain (Hot Springs Mountain Anticline), Hot Springs National Park, ZigZag Mountains, Arkansas, USA (vicinity of 34° 30.939’ North latitude, 93° 02.863’ West longitude)
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Info. at:
For best view is on black
Little ZigZag Falls,Mount Hood National Forest
Oregon
photo by Gary Meyers photography .
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